How to measure electromagnetic radiation - EMF meter selection guide

How to choose an EMF meter? Which features to look out for and for which you should avoid overpaying? How to use them – user manuals and great videos! Is there a device that measures all types of radiation? Are radiation measurements only needed when there is a significant radiation source nearby? Which radiation values are considered high and where are they usually recorded? What methods of protection are available if you find elevated prices? The last web page you are going to visit before you buy electromagnetic radiation meters!

What do radiation meters measure?

EMF (electromagnetic fields) or EMR (electromagnetic radiaton) meters are divided into 3 main categories according to the type of the radiation they measure:

  • Low frequency radiation meters measure electric and magnetic fields from electrical and electronic devices, power cables and transformers etc.
  • High frequency radiation meters measure electromagnetic fields (radio waves, micro waves etc) from cell phones and cell phone masts, wireless internet, cordless phones, bluetooth devices, alarm systems, microwave ovens, wireless game consoles, TV and radio broadcasting antennas, radars, police communications etc.
  • Radioactivity meters measure a and b particles, gamma and X rays from granite tiles, medical equipment, radon gas, subsoil, nuclear accidents etc. (especially for radon measurements we recommend you choose a radon monitor instead of a general use radioactivity geiger type counter)

electromagnetic frequency spectrum

Where do we usually record elevated electromagnetic fields?

  • In densely populated areas because of the presence of more mobile antennas, greater power consumption and more dense power distribution network
  • In houses where the low voltage cables are situated near high use areas (bedrooms, living rooms etc.)
  • In residences adjacent to mobile phone masts, power lines and transformers
  • In offices because of the multitude of electronic and wireless devices
  • In apartments due to the presence of a multitude of wireless phones and wi-fi modems
  • In older homes due to wiring problems
  • On the upper floors of buildings due to increased exposure to high frequency antennas
  • In the lower floors with insufficient ventilation due to elevated levels of radon

various electromagnetic field sources

Which radiation values are high?

You can read the proposed safe levels of exposure to each type of radiation in our low frequency, high frequency and radioactivity meters guides or in our article about the proposed and legal safe levels of radiation..

How can a radiation meter help me reduce my radiation exposure?

  • You will identify the obvious or hidden radiation sources around you so that you can remove or replace them
  • You will avoid radiation hotspots (were the limits of safe long-term exposure to high frequency radiation are exceeded) by increasing your distance from the radiation source.
  • You will see if you have achieved low radiation levels in your areas after using electromagnetic shielding materials or implementing other solutions proposed in our radiation reduction tips guide.

It is easy to measure electromagnetic fields on my own?

Since radiation measurements have become mainstream the past years, the majority of EMF meters (and all the meters we recommend) are very simple to use and do not require any technical knowledge.

How do you choose the meters you recommend?

There are dozens EMF meter manufacturers, selling hundreds different EMF meters, from every corner of the world.

How did we end up recommending only a few of them?

Well…

Home Biology is run by engineers who perform electromagnetic radiation measurements for a living.

We know what features you to need to look for when buying an EMF meter, so that you can easily and reliably take the necessary measurements, without overspending.

We’ve got everything covered! Just read on and choose the meter you like!

Thinks we consider before recommending a meter…

  • Frequency range

Does it cover the frequency range of the most common radiation sources?

  • Measurement span

Does it measure even low radiation values so that you can compare them to even the lowest recommend safety limits?

Does it measure high enough values so that you can record the radiation from the majority of the high radiation sources?

  • Necessary features

Does it offer the basic features needed to perform an EMF measurement?

  • Price

Does it offer the same features but with a lower price than other similar meters?

  • Ease of use

Is it simple to use, without confusing lights, buttons and directions of use?

  • Ability to detect radiation sources

Does it help you find which radiation sources affect you or were their location is (by using audio signal, directional antenna etc)?

  • Manufacturer

Is it manufactured by a reputable company with real factories, personnel , email, phone and website? Good luck with finding the manufacturers of some of the cheapest china made meters on the market…

  • Warranty

Does it come with at least a year of real and binding warranty, so that you can have it replaced or repaired if there is a problem?

  • Seller

Is it sold by trusted sellers with good customer service, that can ship the meters worldwide?

  • Helpfull manuals or videos

Does it have easy to read English manuals and/or videos of real use online?

Unfortunately most meters in the market do not include one or all of the above basic features. All these above factors are analyzed in our high frequency meter, low frequency meter and radioactivity meter guides. Please read them carefully before you purchase!

varuous emf meters

How can i measure radiation from cell towers, cordless phones, Wi-Fi modems, tablets, smartphones, baby monitors, microwave ovens etc.?

 You will need a high frequency (=wireless) radiation meter which measures electromagnetic field power density (in mW/m2 = milliwatts per square meter = 1000 μW/m2 = 1000 uW/m2 = 1000 microwatts per square meter) or high frequency electric field intensity (in V/m), or both.

High frequency meters should be able to record radiation in the frequency range 800-2500MHz (at least) which most modern wireless radiation sources emit.

Some have an antenna attached that can help you locate the direction fo the radiation, others produce different sounds according to the radiation source, others have both features.

Learn more about high frequency radiation meters, sources and safety limits..

How can i measure radiation from power cables, transformers, pylons, electrical devices etc.?

You will need a low frequency radiation meter which measures low frequency magnetic and/or electric fields from all wired radiation sources.

All wired radiation sources connected to the power network generate electrical alternative current (AC) fields due to electrical voltage. When electrical current flows through the conductors (when there is electricity consumption) AC magnetic fields are also produced.

Low frequency meters should be able to record radiation in the frequency range 50-60Hz (at least) which is the main frequencies of electrical grids.

Magnetic field meters measure magnetic field flux density in nT (= nano Tesla) or mG (= milli gauss = 100nT).  Magnetic fields penetrate unaffected almost all building materials and the most common cause of elevated values ​​are the low voltage power cables, especially in densely populated areas.

Measuring magnetic fields is, in our opinion, the most important measurment you should take before buying or renting property, because high magnetic fields are difficult and expensive to reduce.

Electric field meters measure electric field density in V/m (= Volt per meter) or Body Voltage in mV (= milli volt). Electric fields are elevated near high voltage cables, but do not enter the interior of the buildings because they are grounded from most building materials (except from glass or wood). Inside the buildings electric fields are produced mainly form the in wall cables anf the electricl appliances that are plugged in.

Low frequency electric field measurements are indicated in areas such as bedrooms, where continuous power supply of devices and circuits is not necessary. Also the presence of high electric fields ia probably more aggravated during night sleep.
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Learn more about low frequency radiation meters, sources and safety limits...

How can i measure radioactivity from building materials, nuclear accidents, medical equipment, radon etc.?

The radioactivity or ionizing radiation meters measure the radiation from radioactive materials (subsoil, food, building materials, tiles, granite counters, nuclear accidents, ionization smoke detectors, medical equipment etc.) and from the radioactive radon gas that is emitted from the soil, enters the buildings from pipes and cracks, accumulates especially in low floors with inadequate ventilation and is the most common source of radioactivity exposure.

Radioactivity meters 

Radioactivity meters usually contain a Geiger - Muller tube which records the effective dose rate of radioactivity in μSv/h ( = uSv/hr = micro sivert per hour) from building materials (granite etc.), nuclear accidents, medical equipment etc.

Most Geiger counters measure only gamma radiation, some additionaly measure X-rays and beta particles.

They usually cannot measure alpha particles which are emmited by radon.

Radon meters

The radioactive radon gas is emitted from the soil, is the main source of population exposure to radioactivity, and is listed as a proven carcinogen by the Wolrd Health Organization.

Radon meters measure the concentration of radon per cubic meter (in Bq / m3), were Bq = Becquerel =  the number of radioactive disintegrations per second.

Learn more about radioactivity - geiger meters, sources and safety limits...

Learn more about radon meters, sources and safety limits...

How can I measure geopathic radiation?

Geopathic fields are non artificial fields believed to be emitted from the earth. These are separated into water, Ley, Hartmann, Curry lines etc. Their existence today is disputed and / or considered insignificant in relation to strong electromagnetic fields from modern artificial radiation sources (antennas, transformers, cables, etc.).

Also, there is yet to be found a scientific commonly accepted way of measuring them.

To identify them the main way used is still dowsing by people who have the ability to feel ethereal or earthy fields (radiaesthesis). Some research has been done on the subject (Betz, Hans D .: Journal of Scientific Exploration 8: 436, 1994, Recent results on water dowsing / Maes W: Radiästheten im Test. Wohnung und Gesundheit 58; 1991) and our personal experience (the writer of this article is a certified Geobiological Consultant by the German Institut Geo-Baubiologie) makes us believe that this method gives very subjective results. Some claim that they measure geopathic fields with the use of geomagnetometers, however this measurement, especially indoors, detects static fields from steel pipe lines, reinforcement, bed springs and is not related to earthly energies.

Is there a meter that measures all types of radiation?

So far there are no meters that measure all types of radiation (ionizing and non ionizing), but there are meters that measure the basic artificial electromagnetic fields that are the main part of electrosmog today:

  • low frequency magnetic fields (non ionizing radiation from power lines, transformers etc)
  • low frequency electric fields (non ionizing radiation from electrical cables, devices, etc)
  • high frequency electromagnetic fields (non ionizing radiation from wireless phones, cell phones masts etc)

These are called combination meters and their main advantages is that you only need one to carry around for your basic emf measurements and they usually cost a lot less compared to buying 2-3 different meters to do the same measurements.

On the other hand combination meters tend not to perform well in all types of measurements.

Some times their performance in specific measurements is really terrible, so try to read their specifications and our comments in the comparison tables before you decide to buy one of them.

Read more about combination meters, their advantages and disadvantages..

Why should i measure the electromagnetic fields in my home or workplace?

The continuous increase of modern day electromagnetic pollution (=electrosmog) makes radiation measurements more relevant and necessary than ever, especially for the most vulnerable population groups (pregnant women, children, elderly and ill people).

Measurements of the invisible electromagnetic fields is the only way to determine if the areas where you spend most of your time exceed the proposed limits exposure to artificial radiation due to the presence of visible and invisible radiation sources (mobile phone masts, cordless telephones, and modem-router Wi- Fi, electrical appliances, cables, pylons, transformers etc.).

By measuring electromagnetic fields you can significantly reduce your daily electromagnetic burden, by identifying and avoiding electromagnetic hotspots and in many other ways which are detailed in the Home Biology EMF reduction guide.

“whereas electromagnetic fields (EMFs) exist in nature and have consequently always been present on earth; whereas, however, in recent decades, environmental exposure to man-made sources of EMFs has risen constantly, driven by demand for electricity, increasingly more specialised wireless technologies, and changes in the organisation of society; whereas the end effect is that every individual is now being exposed to a complex mixture of electric and magnetic fields of different frequencies, both at home and at work” European Parliament resolution on the health problems associated with electromagnetic fields (2008/2211) [1]

Are EMF measurements only needed when there is a significant radiation source nearby?

The high levels of radiation in a space is not only related to the proximity of visible external radiation source but also to the presence of radiation sources that you have no visible contact with or known sources that most people do not suspect as significant fields emitters.

For example wireless devices you or your neighbors use (such as cordless phones and Wi-Fi modems) often expose you to higher radiation values than neighboring cell phone masts due to shorter distance and indoor transmission.

Similarly, statistics indicate that the most common cause of elevated magnetic fields are the low voltage distribution cables that bring electricity to our homes and not the high voltage power transmission cables.

Other sources you should consider:

  • cell phone masts that are usually camouflaged as fake chimneys, solar panels, billboards, etc .. (cell phone masts are now in almost every neighborhood and their camouflage is a common practice of the telecommunication companies so as to avoid confrontations with neighbors)
  • amateur radio antennas, radio networks for police, taxis, logistic and security companies, radars in airports, ports, military, meteorological etc.
  • wireless devices from neighbors (cordless phones and modems, baby monitors, wireless alarms, cell phone signal amplifiers etc.)
  • underground power cables and transformers
  • ungrounded electrical appliances
  • electrical wiring issues (damaged insulation, errors in circuit connections etc)
  • radioactive building materials or radioactive radon gas leaking from cracks and pipes

Which population groups should definitely check their areas for high electromagnetic fields?

"We need to test the electromagnetic exposure of the sleeping location of the mother during pregnancy and also her working area, if she is working. If the mother is sleeping in strong electromagnetic fields the child will be neurologically abnormal. Within 2 years the child will develop all the signs of autism, neurological dysfunction, hyperactivity, learning disorders and so on." Dr. Dietrich Klingkchart, Institute of Neurobiology Washington [2]

  • For patients or those with unexplained health symptoms, because long-term exposure to a variety of artificial radiation is related to the development of wide range of health symptoms.

"Too often do we observe a marked concentration of particular illnesses in correspondingly high -frequency microwave radiation (HFMR) polluted areas or apartments. Too often does a long-term disease or affliction improve or disappear in a relatively short time after reduction or elimination of HFMR pollution in the patient's environment. Too often are our observations confirmed by on-site measurements of HFMR of unusual intensity." The Freiburger Appeal - Union Resolution of Environmental Medicine, Germany ( IGUMED) [3]

[1] European Parliament resolution of 2 April 2009 on health concerns associated with electromagnetic fields (2008/2211(INI))
[2] Dr. Dietrich Klinghardt, MD, PhD, Why the U.S. Needs Pre-Conception Healthcare, http://www.youtube.com/watch?v=sSit3i_-z0w

We advise you to read our guides on Low Frequency Meters, High Frequency Meters, Combination Meters and Radioactivity Meters which contain detailed information about how to use each type of meter and which are the important features to look for, but if you are in a hurry see all the recommended meters below:

Single axis magnetic field meters 

Basic magnetic field meters which can measure only in one direction at a time. Some of the meters presented also measure electric fields (single axis).

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Antenna/Sencor
  •   Low frequency range (Hz)
  •   High frequency range (MHz)
  •   Units of measurement
  •   Measurement range low frequency magnetic field
  •   Measurement range low frequency electric field
  •   Measurement range high frequency electromagnetic field
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • Gauss Master
  • Unknown (China?)
  • $35
  • The cheapest single axis magnetic field meter with analogue display!
  • Single axis low frequency magnetic
  • 30 - 400
  • mG, μΤ
  • 0.1 -199.9 mG or 10-199900nT
  • Analogue
  • 4% ±3 digits at 50/60 Hz
  • 9V (not included)
  • 30 days from Lessemf
  • EMF 822-A
  • Lutron Electronic Enterprise Co. Ltd. (Taiwan)
  • $80
  • The cheapest single axis magnetic field meter with digital display!
  • Single axis low frequency magnetic
  • 30 - 300
  • mG, μΤ
  • 0.1 -199.9 mG or 10-199900nT
  • Digital
  • 4% ±3 digits at 50/60 Hz
  • 9V (not included)
  • 1 year
  • GM3120
  • Benetech - Shenzhen Jumaoyuan Science and Technology Co. Ltd (China)
  • $50
  • The cheapest single axis magnetic and electric field meter!
  • Single axis low frequency magnetic / Single axis low frequency electric
  • 5-3500
  • μΤ, V/m
  • 10-19990nT
  • 1-1999 V/m
  • Digital
  • 6F22 9V battery
  • 30 days from EMFields
  • ED-88T
  • CORNET Microsystems Inc. (USA)
  • $190
  • The cheapest single axis magnetic and electric field meter which also measures high frequency (wireless) electromagnetic fields! According to the WILA Bonn report though, another Cornet meter, the ED78S, greatly exaggerates its high frequency range and accuracy. Also, measurement values are dependent on how meter is held and sometimes show extreme underestimation of exposure levels at higher signal strengths..
  • Single axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 50-10000
  • 100-8000
  • mG, μΤ, dBm, V/m, mw/m²
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • Peak
  • Digital
  • RF: +/- 3.5dBm, LF: 20%, E-field: 25%
  • 9V alkaline battery or 9v Li-ion rechargeable battery (not included)
  • >20 hours
  • 30 days from Lessemf

Triple axis magnetic field meters 

Advanced magnetic field meters which calculate directly the total three-dimensional value and are very easy to use. Again, some of the meters presented also measure electric fields (single axis).

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Antenna/Sencor
  •   Low frequency range (Hz)
  •   High frequency range (MHz)
  •   Units of measurement
  •   Measurement range low frequency magnetic field
  •   Measurement range low frequency electric field
  •   Measurement range high frequency electromagnetic field
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • MT-263
  • Magnii Technologies (USA)
  • $260
  • The cheapest triple axis magnetic field meter with analogue display!
  • Triple axis low frequency magnetic
  • 15-5500
  • mG, μΤ
  • 0.01-250mG or 1-25000nT
  • True-RMS + Max Hold
  • Digital
  • ±(4% + 4 digits) from 48 to 62 Hertz
  • 9v alkaline battery (included) You can also buy AC to 9V DC Adapter for A107 (Cat. #A174-9) ............ $12.95
  • Approximately 15 hours
  • 18$ hard plastic case from Magniie Technologies (Case dimensions are 10.69" x 9.52" x 3.36" and features pluck-foam so you can customize it to hold any of your equipment!)
  • Can be recalibrated for $50. Magniie uses digital calibration methods that don't drift with normal operation, so typically recalibration isn't necessary unless the unit has been damage.
  • 2 years
  • DSP-523
  • Magnii Technologies (USA)
  • $290
  • Similar to the Magnii 263 with extra analysis of dirty electricity and harmonics. Allows you to isolate or ignore power line frequencies at 50 (Europe) or 60 Hz (North America) or measure non-power line related fields without distortion from power line fields (including harmonics) or accurately measure power line fields without any distortion from other field sources. Not sure if you need all of these though.
  • Triple axis low frequency magnetic
  • 30-300
  • mG, μΤ
  • 0.01-250mG or 1-25000nT
  • True-RMS + Max Hold
  • Digital
  • ±(4% + 4 digits) from 48 to 62 Hertz
  • 9v alkaline battery (included) You can also buy AC to 9V DC Adapter for A107 (Cat. #A174-9) ............ $12.95
  • Approximately 20 hours
  • 18$ hard plastic case from Magniie Technologies (Case dimensions are 10.69" x 9.52" x 3.36" and features pluck-foam so you can customize it to hold any of your equipment!)
  • Can be recalibrated for $50. Magniie uses digital calibration methods that don't drift with normal operation, so typically recalibration isn't necessary unless the unit has been damage.
  • 2 years
  • Trifield 100XE
  • Alphalab (USA)
  • $150
  • Cheap combination meter (Triple axis low frequency magnetic – Single axis low frequency electric – Single axis high frequency electromagnetic). It is kind of worthless as a high frequency meter because it only detects vey high radiation values, so the Tri-field name is rather misleading. Also it has an analogue display and outdated look.
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 40-100000
  • 50-3000
  • mG, V/m, mW/cm2
  • 0.2 -100 mG (=20-10000nT)
  • 5-1000 V/m
  • 100000-10000000μW/m2 VERY HIGH VALUES-NOT RECOMMENDED FOR HIGH FREQUENCY MEASUREMENTS
  • Analogue
  • +/- 20% of reading for low frequency magnetic, +/- 30% of reading for low frequency electric, ½ x to 2 x of reading for high frequency electromagnetic
  • 9V battery
  • ~40 hours
  • 1 year limited warranty from EMFields
  • Trifield Broadband 100XE
  • Alphalab (USA)
  • $190
  • More or less the same as the 100XE model, but with a difference in high frequency range (0.1-2500 MHz compared to 50-3000MHz for the 100XE) so it can also detect some type of radio transmitters the 100XE can’t. ). This model is also kind of worthless as a high frequency meter because only detects vey very high radiation values for high frequency fields, but again it has good value because of the low frequency measurements it offers.
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 40-100000
  • 0.1-2500
  • mG, V/m, mW/cm2
  • 0.2 -100 mG (=20-10000nT)
  • 5-1000 V/m
  • 10-1000 V/m (= 265251-2652519893μW/m2) VERY HIGH VALUES-NOT RECOMMENDED FOR HIGH FREQUENCY MEASUREMENTS
  • Analogue
  • +/- 20% of reading for low frequency magnetic, +/- 30% of reading for low frequency electric, +30% to -25% for high frequency electromagnetic
  • 9V battery
  • ~40 hours
  • 1 year limited warranty from EMFields
  • TM-190
  • TENMARS ELECTRONICS CO. LTD, (TAIWAN)
  • $200
  • Cheap combination meter similar to Trifield meters but this is a lot better at measuring high frequency fields. Again, this model also must have its limitations on high frequency measurements, since according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect many sources in the specified frequency range or showed abnormally elevated values...
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 50-60
  • 50-3500
  • mG, μΤ, V/m, mV/m, V/m, μA/m, mA/m, μW/m2, mW/m2, μW/cm2
  • 0.02-2000mG or 2-200000nT
  • 50-2000V/m
  • 0.02-554000μW/m2 (according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect as low as 3.6 μW/m2 but only from 41 μW/m2, which is not acceptable for Building Biology standards)
  • RMS
  • Digital
  • Magnetic ±(15%+100dgt), Electric ± (7% + 50dgt), Electromagnetic: ± 2dB at 2.45GHz
  • 1.5V AAA Alkaline Battery*3.
  • ~8 hours

 Triple axis magnetic field meters with Data Logging

Triple axis meters which can store magnetic field measurements and calculate the average level of exposure at the end of the measurement session. Some of the meters presented also measure electric fields (single or triple axis!). Our recommendation for low frequency measurements!

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Antenna/Sencor
  •   Low frequency range (Hz)
  •   High frequency range (MHz)
  •   Units of measurement
  •   Measurement range low frequency magnetic field
  •   Measurement range low frequency electric field
  •   Measurement range high frequency electromagnetic field
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • TM-192D
  • TENMARS ELECTRONICS CO. LTD, (TAIWAN)
  • $200
  • Cheapest triple axis meter with data logging and PC software! The PC software requires installation and is not good as the Gigahertz NFA software though.
  • Triple axis low frequency magnetic
  • 30-2000
  • mG, μΤ
  • 0.01-2000mG or 1-200000nT
  • Datalogging capacity with Memory Size: 9999 data sets. USB PC interface
  • Digital
  • 20 mG ±(3.0%+30dgt) at 50Hz/60Hz.
  • 9V NEDA 1604, IEC 6F22 or JIS 006P Don't forget the AC to 9V DC Adapter to power this meter for prolonged use: Regulated AC to 9V DC Adapter for A108 (Cat. #A174-9) ............ $12.95
  • ~100 hours
  • EMDEX Mate
  • Enertech Consultants (USA)
  • $569
  • Simple to use triple axis meter which provides the average level of exposure at the end of the measurement session.
  • Triple axis low frequency magnetic
  • 40-1000
  • mG, μΤ
  • 0.1 -1000 mG or 10-100000nT
  • True RMS
  • When data collection is finished the meter shows Time-Weighted-Average (this is the average level of exposure during the measurement period), Minimum and Maximum levels recorded during the measurement period, Standard Deviation, Percent of Time in Six Different Exposure Level Ranges and Cumulative Exposure Time.
  • Digital
  • 1-3%
  • 9 Volt Alkaline or Lithium
  • >50 hours (alkaline battery)
  • Comes with a calibration certificate (NIST Traceable serialized) and can be recalibrated from the manufacturer.
  • 30 days from EMFields
  • NFA30M
  • Gigahertz Solutions GmbH (Germany)
  • $650
  • Best choice for the triple axis magnetic fields measurements. Includes a 4GB memory card and the “no installation needed”, simple to use software NFAsoft which is in our opinion the best for datalogging and analyzing the results.
  • Triple axis low frequency magnetic
  • 16-32000
  • mG, μΤ, nT
  • 0.01-199.90mG or 1 - 19990 nT (up to 400000 nT upon request)
  • True RMS, Peak, Peak Hold
  • Measurement data are recorded in the 4GB SD memory card and can be analyzed though a PC using the NFAsoft application (no installation needed). Can record continuously up to a week with power supply or up to 48 hours without power supply. NFAsoft provides average, minimum and maximum values (total and for each axis separately) and allows you to analyze the much discussed phenomenon of "dirty power (harmonics)" by showing you measurement data for the total 16-32000Hz frequency range, and for 16Hz, 50/60Hz, 100-120Hz (2nd harmonics), 150-180 (3rd harmonics),<2000Hz and >2000Hz
  • Digital
  • 50 / 60 Hz: +/- 5 % 16 Hz - 30 kHz: +/- 1 dB Isotropic deviation: +/- 1,5 dB Offset +/- 3 Digits
  • Rechargeable 7.4-Volt Li-ion high quality battery pack (included) Power supply unit included
  • ~48 hours in logging mode
  • Gigahertz plastic transport case K5 (approx. 27 x 18 x 8 cm) with foam filler inserts
  • 2 years
  • NFA400
  • Gigahertz Solutions GmbH (Germany)
  • $1200
  • Similar to the NFA30M but also offers single axis electric field measurements.
  • Triple axis low frequency magnetic / Single axis low frequency electric
  • 5-400000
  • mG, μΤ, nT, V/m
  • 0.01-199.90mG or 1 - 19990 nT (up to 400000 nT upon request)
  • 0.1-1999Vm (+ 1 - 19,990 mV for Body Voltage Measurements)
  • True RMS, Peak, Peak Hold
  • Measurement data are recorded in the 4GB SD memory card and can be analyzed though a PC using the NFAsoft application (no installation needed). Can record continuously up to a week with power supply or up to 48 hours without power supply. NFAsoft provides average, minimum and maximum values (total and for each axis separately) and allows you to analyze the much discussed phenomenon of "dirty power (harmonics)" by showing you measurement data for the total 16-32000Hz frequency range, and for 16Hz, 50/60Hz, 100-120Hz (2nd harmonics), 150-180 (3rd harmonics),<2000Hz and >2000Hz
  • Digital
  • 50 / 60 Hz: +/- 5 % 16 Hz - 30 kHz: +/- 1 dB 5Hz - 400 kHz: +/- 2 dB Isotropical deviation: +/- 1.5 dB Offset +/- 5 Digits
  • Rechargeable 7.4-Volt Li-ion high quality battery pack (included) Power supply unit included
  • ~36 hours in logging mode
  • Gigahertz plastic transport case K5 (approx. 27 x 18 x 8 cm) with foam filler inserts
  • 2 years
  • NFA1000
  • Gigahertz Solutions GmbH (Germany)
  • $1900
  • Our top recommendation for low frequency measurements! The only triple axis magnetic field meter which also offers triple axis electric field measurements in that price range.
  • Triple axis low frequency magnetic / Triple axis low frequency electric
  • 5-1000000
  • mG, μΤ, nT, V/m
  • 0.01-199.90mG or 1 - 19990 nT (up to 400000 nT upon request)
  • 0.1-1999Vm (+ 1 - 19,990 mV for Body Voltage Measurements)
  • True RMS, Peak, Peak Hold
  • Measurement data are recorded in the 4GB SD memory card and can be analyzed though a PC using the NFAsoft application (no installation needed). Can record continuously up to a week with power supply or up to 48 hours without power supply. NFAsoft provides average, minimum and maximum values (total and for each axis separately) and allows you to analyze the much discussed phenomenon of "dirty power (harmonics)" by showing you measurement data for the total 16-32000Hz frequency range, and for 16Hz, 50/60Hz, 100-120Hz (2nd harmonics), 150-180 (3rd harmonics),<2000Hz and >2000Hz
  • Digital
  • 50 / 60 Hz: +/- 5 % 16 Hz - 30 kHz: +/- 1 dB 5 Hz - 1000 kHz: +/- 2 dB Isoptropic deviation: +/- 1.5 dB Offset +/- 5 digits
  • Rechargeable 7.4-Volt Li-ion high quality battery pack (included) Power supply unit included
  • ~48 hours in logging mode
  • Gigahertz plastic transport case K5 (approx. 27 x 18 x 8 cm) with foam filler inserts
  • 2 years

Basic high frequency meters

Low cost meters from various manufacturers with basic functions. Also, their small size makes them easier to carry around.

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Special features
  •   Antenna/Sencor
  •   Frequency range (MHz)
  •   Units of measurement
  •   Measurement range
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • Acousticom 2
  • EMFields Solutions Ltd (United Kingdom)
  • $250
  • Very simple to use device that does not give a precise measurement but has 8 LED lights that correspond to different radiation levels and are easy to interpret. Recommended if you do not want to get confused with numbers and measurement units.
  • Single axis
  • 200-8000
  • V/m
  • 0,01-6 V/m (0,27-95490μW/m2)
  • Peak
  • 8 LED lights
  • (but you can see the LEDs anyway)
  • (with audio signal analysis for recognizing different radiation sources)
  • +/-6dB
  • 1x PP3/MN1604 9 volt Alkaline or Rechargeable
  • Up to 10 hours continuous use with normal alkaline battery
  • (Carry pouch)
  • 2 years from EMFields, 30 days from Lessemf
  • ED-15C
  • CORNET Microsystems Inc. (USA)
  • $90
  • Cheap single axis meter with basic features. According to the WILA Bonn report though, another Cornet meter, the ED78S, greatly exaggerates its frequency range and accuracy. Also, measurement values are dependent on how meter is held and sometimes shows extreme underestimation of exposure levels at higher signal strengths...
  • 8 LED lights used for quick RF signal level indications + moving bargraph showing signal changes over the last 32 readings. According to the WILA Bonn report the LED lights of another Cornet meter, the ED78S,were confusing as they showed "All clear" green light at 4000μW/m2 which is considered very from high from Building Biology perspective..
  • Single axis
  • 100-3000
  • dBm, V/m, mw/m²
  • 0.025-14.8 V/m or 1.5-58000 μw/m²
  • Peak
  • Digital
  • 9V alkaline battery, (not included)
  • >20 hours
  • 30 days from Lessemf
  • MD-18
  • CORNET Microsystems Inc. (USA)
  • $190
  • Covers a wide frequency range than ED-15C. It also detects the frequency of the primary radiation source which is helpful in identifying were the radiation comes from. According to the WILA Bonn report though, another Cornet meter, the ED78S, greatly exaggerates its frequency range and accuracy. Also, measurement values are dependent on how meter is held and sometimes shows extreme underestimation of exposure levels at higher signal strengths... MD-18 has a more professional look than the other Cornet meters
  • 8 LED lights used for quick RF signal level indications + moving bargraph showing signal changes over the last 32 readings. According to the WILA Bonn report the LED lights of another Cornet meter, the ED78S,were confusing as they showed "All clear" green light at 4000μW/m2 which is considered very from high from Building Biology perspective..
  • Single axis
  • 100-8000
  • dBm, V/m, mw/m²
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • Peak
  • Digital
  • two AA size 1.5V alkaline or rechargeable NiMH battery, (not included)
  • >20 hours
  • 30 days from Lessemf
  • ED-88T
  • CORNET Microsystems Inc. (USA)
  • $190
  • New Cornet combination meter that measures high frequency like the MD18 but also offers audio signal and low frequency fields measurements for the same price! According to the WILA Bonn report though, another Cornet meter, the ED78S, greatly exaggerates its frequency range and accuracy. Also, measurement values are dependent on how meter is held and sometimes shows extreme underestimation of exposure levels at higher signal strengths...
  • Also measures low frequency electric and magnetic fields (single axis, 50-10000Hz, 0.1-600mG, 10-1000V/m). 8 LED lights used for quick RF signal level indications + moving bargraph showing signal changes over the last 32 readings. According to the WILA Bonn report the LED lights of another Cornet meter, the ED78S,were confusing as they showed "All clear" green light at 4000μW/m2 which is considered very from high from Building Biology perspective..
  • Single axis
  • 100-8000
  • dBm, V/m, mw/m²
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • Peak
  • Digital
  • RF: +/- 3.5dBm, LF: 20%, E-field: 25%
  • 9V alkaline battery or 9v Li-ion rechargeable battery (not included)
  • >20 hours
  • 30 days from Lessemf
  • TM-195
  • TENMARS Electronics Co. Ltd (TAIWAN)
  • $199
  • Low cost meter which covers almost all basic features. Would be great if it also had audio signal to help distinguish the different radiation sources. According to the WILA Bonn report though, another Tenmars model, the TM-196, could not detect many sources in the specified frequency range or showed abnormally elevated values...
  • Triple axis
  • 50-3500
  • mV/m, V/m, μA/m, mA/m, μW/m2, mW/m2, μW/cm2
  • 0.038- 20 V/m or 3.83-1061007 μW/m2 (according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect as low as 3.6 μW/m2 but only from 41 μW/m2, which is not acceptable for Building Biology standards)
  • Instantaneous, maximum, average or maximum average value
  • (records Max and Average values, up to 200 data sets, up to 100 minutes total)
  • Digital
  • 9V NEDA 1604, IEC 6F22 or JIS
  • ~15 hours
  • 1 year
  • TM-190
  • TENMARS Electronics Co. Ltd (TAIWAN)
  • $199
  • Cheap combination meter similar to Trifield meters, but this one is a lot better at measuring high frequency fields! Again this meter also probably has its own problems, since according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect many sources in the specified frequency range or showed abnormally elevated values...
  • Also measures low frequency electric and magnetic fields (triple axis magnetic,50/60Hz 0.02-2000mG, single axis electric, 50/60Hz, 50-2000V/m)
  • Single axis
  • 50-3500
  • μW/m2
  • 0.02-554000μW/m2 (according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect as low as 3.6 μW/m2 but only from 41 μW/m2, which is not acceptable for Building Biology standards)
  • Instantaneous
  • Digital
  • ± 2dB at 2.45GHz
  • 1.5V AAA Alkaline Battery*3
  • ~8 hours
  • 1 year
  • TES-593
  • TES (China)
  • $499
  • Meter similar to the Tenmars 195 but with a wider frequency range and a lot higher price. According to the WILA Bonn test though, it could not detect UMTS signal at all and in other frequencies it showed abnormally low or high values...
  • You can choose a calibration factor according to the frequency of the source (serves to calibrate the result display). Is a useless feature if you are not sure what the source is.
  • Triple axis
  • 10-8000
  • mV/m, V/m, μA/m, mA/m, μW/m2, mW/m2, μW/cm2
  • 0.020 - 108 V/m or 1-30938992 μW/m2 (according to the WILA Bonn report, at 10μW/m2 the 100MHz and 400MHz readings were more than 20 times higher, at 900MHz 30 times lower and at higher frequencies 100 to 500 lower than what would be correct!)
  • Instantaneous, maximum, average or maximum average value
  • (records Max and Average values, up to 99 data sets)
  • Digital
  • ±1dB
  • 9V NEDA 1604/1604A (Alkaline battery)
  • >3 hours
  • 1 year
  • EM2
  • Heliognosis (Canada)
  • $129
  • Basic device with analogue display that covers a very wide frequency range. Does not detect very low levels of radiation.
  • Single axis
  • 50- 10000 (with decreased response up to 18Ghz=18000MHz).
  • μW/cm2, mW/cm2
  • 0.005 - 40mW/cm2 (50- 400000000 μW/m2)
  • Peak
  • Analogue
  • +/-10% (50Hz to 10Ghz)
  • 9V Duracell
  • ~50 hours
  • 1 year

 Advanced high frequency meters

High quality Gigahertz meters with directional and/or isotropic antennas for easy and reliable identification and measurement of wireless radiation sources!

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Special features
  •   Antenna/Sencor
  •   Frequency range (MHz)
  •   Units of measurement
  •   Measurement range
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • HFE35C
  • Gigahertz Solutions GmbH (Germany)
  • $795
  • Combines the best features for locating, recognizing and measuring radiation sources. Contains the HF35C device with a directional antenna which helps you find where the radiation comes from and an omnidirectional antenna which extends the measured frequency range and helps get more accurate radiation readings. Reliable German technology.
  • Contains a directional antenna which helps you find where the radiation comes from and an omnidirectional antenna which extends the measured frequency range and helps get more accurate radiation readings.
  • 800-2700 with directional antenna, 27-3300 with omnidirectional antenna
  • µW/m², mW/m2
  • 0.1 - 1999 µW/m² (can be extended up to 199900 µW/m² by connecting the attenuator DG20 to the antenna, which reduces the sensitivity of the measuring device by a factor of 10 – sold for about 50$)
  • Peak and Average
  • Digital
  • (with audio signal analysis for recognizing different radiation sources)
  • +/-6dB
  • 9 Volt alkaline manganese battery (included)
  • ~4-7 hours
  • Gigahertz plastic transport case K5 (approx. 27 x 18 x 8 cm) with foam filler inserts - INCLUDED!
  • 2 years
  • HFE59B
  • Gigahertz Solutions GmbH (Germany)
  • $1600
  • The best model for professional or amateur use! Reliable German technology. Contains the HF59B device with a directional and omnidirectional antenna. Compared to the cheaper Gigahertz models, HFE59B offers many advanced features.
  • A quantitative differentiation between pulsed and un-pulsed radiation + Rechargeable battery pack with a battery charger + LEDs for monitoring the function of the antenna + 800 MHz high pass filter HP800_G3 for the suppression of low frequencies when measuring with the directional antenna + High frequency preamplifier HV10_27G3 and attenuator DG20_G10 which increase the measurement range + Audio output for PC (sound card) / headphones / spectrum analyzer + Big Gigahertz plastic transport case with formed foam filler inserts which fits at least two devices with antenna.
  • Contains a directional antenna which helps you find where the radiation comes from and an omnidirectional antenna which extends the measured frequency range and helps get more accurate radiation readings.
  • 800-2700 with directional antenna, 27-3300 with omnidirectional antenna
  • µW/m², mW/m2
  • 0.01 - 19990 µW/m² (can be extended up to 1999000 µW/m² by connecting the attenuator DG20_G3 to the antenna, which reduces the sensitivity of the measuring device by a factor of 10 - INCLUDED!)
  • Peak, Peak Hold and Average
  • Data logging available by connecting to the Gigahertz NFA1000 or NFA400. Data can be transferred to PC showing analytic charts, minimum, maximum and average exposure + other features.
  • Digital
  • (with audio signal analysis for recognizing different radiation sources)
  • +/-3dB
  • 9-Volt NiMH high quality recharchable battery pack with a battery charger (included)
  • ~7-8 hours
  • Gigahertz plastic transport case K2 (approx. 33 x 27 x 16 cm) with formed foam filler inserts (fits two devices with antenna) INCLUDED!
  • Can be send from the manufacturer to an official accredited calibration institute, and is pretty expensive (800 - 900 euros)
  • 2 years

Combination EMF meters

They measure all 3 basic types of manmade radiation (low frequency magnetic fields, low frequency electric fields, high frequency electromagnetic fields). They are cheap compared to buying multiple meters, practical and handy.

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Antenna/Sencor
  •   Low frequency range (Hz)
  •   High frequency range (MHz)
  •   Units of measurement
  •   Measurement range low frequency magnetic field
  •   Measurement range low frequency electric field
  •   Measurement range high frequency electromagnetic field
  •   Signal
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • Trifield 100XE
  • Alphalab (USA)
  • $150
  • Cheap combination meter (Triple axis low frequency magnetic – Single axis low frequency electric – Single axis high frequency electromagnetic). It is kind of worthless as a high frequency meter because it only detects vey high radiation values, so the Tri-field name is rather misleading. Also it has an analogue display and outdated look.
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 40-100000
  • 50-3000
  • mG, V/m, mW/cm2
  • 0.2 -100 mG (=20-10000nT)
  • 5-1000 V/m
  • 100000-10000000μW/m2 VERY HIGH VALUES-NOT RECOMMENDED FOR HIGH FREQUENCY MEASUREMENTS
  • Analogue
  • +/- 20% of reading for low frequency magnetic, +/- 30% of reading for low frequency electric, ½ x to 2 x of reading for high frequency electromagnetic
  • 9V battery
  • ~40 hours
  • 1 year limited warranty from EMFields
  • Trifield Broadband 100XE
  • Alphalab (USA)
  • $190
  • More or less the same as the 100XE model, but with a difference in high frequency range (0.1-2500 MHz compared to 50-3000MHz for the 100XE) so it can also detect some type of radio transmitters the 100XE can’t. ). This model is also kind of worthless as a high frequency meter because only detects vey very high radiation values for high frequency fields, but again it has good value because of the low frequency measurements it offers.
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 40-100000
  • 0.1-2500
  • mG, V/m, mW/cm2
  • 0.2 -100 mG (=20-10000nT)
  • 5-1000 V/m
  • 10-1000 V/m (= 265251-2652519893μW/m2) VERY HIGH VALUES-NOT RECOMMENDED FOR HIGH FREQUENCY MEASUREMENTS
  • Analogue
  • +/- 20% of reading for low frequency magnetic, +/- 30% of reading for low frequency electric, +30% to -25% for high frequency electromagnetic
  • 9V battery
  • ~40 hours
  • 1 year limited warranty from EMFields
  • TM-190
  • TENMARS ELECTRONICS CO. LTD, (TAIWAN)
  • $200
  • Cheap combination meter similar to Trifield meters but this is a lot better at measuring high frequency fields. Again, this model also must have its limitations on high frequency measurements, since according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect many sources in the specified frequency range or showed abnormally elevated values...
  • Triple axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 50-60
  • 50-3500
  • mG, μΤ, V/m, mV/m, V/m, μA/m, mA/m, μW/m2, mW/m2, μW/cm2
  • 0.02-2000mG or 2-200000nT
  • 50-2000V/m
  • 0.02-554000μW/m2 (according to the WILA Bonn report, another Tenmars model, the TM-196, could not detect as low as 3.6 μW/m2 but only from 41 μW/m2, which is not acceptable for Building Biology standards)
  • RMS
  • Digital
  • Magnetic ±(15%+100dgt), Electric ± (7% + 50dgt), Electromagnetic: ± 2dB at 2.45GHz
  • 1.5V AAA Alkaline Battery*3.
  • ~8 hours
  • ED-88T
  • CORNET Microsystems Inc. (USA)
  • $190
  • The cheapest single axis magnetic and electric field meter which also measures high frequency (wireless) electromagnetic fields! According to the WILA Bonn report though, another Cornet meter, the ED78S, greatly exaggerates its high frequency range and accuracy. Also, measurement values are dependent on how meter is held and sometimes show extreme underestimation of exposure levels at higher signal strengths..
  • Single axis low frequency magnetic / Single axis low frequency electric / Single axis high frequency electromagnetic
  • 50-10000
  • 100-8000
  • mG, μΤ, dBm, V/m, mw/m²
  • 0.1-600mG or 10-60000nT
  • 10-1000 V/m
  • 0.014 - 26.2 V/m or 0.52- 1800000μW/m2
  • Digital
  • RF: +/- 3.5dBm, LF: 20%, E-field: 25%
  • 9V alkaline battery or 9v Li-ion rechargeable battery (not included)
  • >20 hours
  • 30 days from Lessemf

 

Radioactivity meters (Geiger counters)

Easy to use radiation meters that measure radioactivity from building materials, granite, medical equipment, nuclear accidents etc

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Detector type
  •   Detects Alpha particles
  •   Detcets Beta particles
  •   Detects Gamma-rays
  •   Detects X-rays
  •   Units of measurement
  •   Measurement range
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio signal
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Low battery indication
  •   Auto power off
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • Radex RD1503
  • Quartarad (Russia)
  • $100
  • Simple, Reliable and Affordable Geiger counter. Russian tech company Quarta-Rad has more than 20 years of experience in developing radiation detection technology for consumers and government agencies. Other Radex models have been tested by the Japanese Consumer Protection Agency and were rated on par in accuracy with professional scientific measuring stations that cost over 2000 dollars!
  • Geiger–Muller tube
  • No
  • Yes, from 0.25 to 3.5 MeV
  • Yes, from 0.1 to 1.25 MeV
  • Yes, from 0.03 to 3.0 Mev
  • µSv/h, µRem/h
  • 0.05 – 9.99 µSv/h or 5-999μRem/h
  • No
  • Digital
  • ± 15 + 6/Р % (where P is a doze rate in µSv/h)
  • 2*AAA
  • 550 hours
  • 1 year
  • GMC-300
  • GQ Electronics LLC (USA)
  • $150
  • Cheap device for radiation detection and monitoring. It can continually monitor the radiation and log the data each second into internal memory. When connected to a PC, software can download the radiation history data to the computer and the user is able to analyze those data later. Also, very portable, since the internal rechargeable battery can be charged with the supplied wall adapter or with the car adapter for the cigarette lighter.
  • Geiger–Muller tube
  • No
  • Yes, from 0.25 to 3.5 MeV
  • Yes, from 0.1 to 1.25 MeV
  • Yes, from 0.03 to 3.0 MeV
  • mR/hr, μSv/hr, CPM
  • 0-327.99 μSv/h 0-32.99 mRem/h 0-65535 CPM
  • Data logging, with date/time stamp (select every second, minute, or hour), USB PC interface and free simplistic software for real-time or delayed downloading and manipulation of your data (Windows XP/Vista/Win7 32 and 64 bits)
  • Digital
  • 20%
  • Rechargeable 9V battery included (can also use Alkaline 9V)
  • 30 days from LessEMF
  • USB-RAD121
  • Magnii Technologies (USA)
  • $220
  • Radiation detector that runs completely off your computer's USB port. Classic geiger counter click and light pulse for every count registered. Radiation levels are displayed on the computer. RadGraph software interface displays and graphs readings over time, and even allows the readings to be streamed to a personal webpage. No batteries or external power required. Must be connected to computer to work, not a stand alone device.
  • Geiger–Muller tube, Detector Window: 30 mg/cm2 x .002” thick
  • No
  • Yes
  • Yes
  • No
  • mR/hr, μSv/hr, CPM
  • 0-50 mR/hr
  • Yes, software allows monitoring of BETA and GAMMA radiation levels right away and shows graphically how the levels are changing over time.
  • No display - Must be connected to PC
  • ±10% Typical
  • Port-Powered from USB Port
  • 2 years
  • RadAlert GEM 2
  • Perspective Instruments (UK)
  • $330
  • Very simple to use Geiger counter that does not give a precise measurement but has 7 LED lights that correspond to different radiation levels (from green = 0 to red = greater than 7.5 micro-sieverts per hour) and are easy to interpret. Recommended if you do not want to get confused with numbers and measurement units.
  • Geiger–Muller tube miniature GM tube LND Inc. Model 712 stainless steel cathode Mica window effective dia. 9.14mm gas filling neon halogen
  • Yes, to a limited extend
  • Yes, to a limited extend
  • Yes, it is calibrated for the measurement of gamma rays
  • Yes, to a limited extend
  • μSv/h
  • 0-7,5 μSv/h
  • No
  • LED lights
  • (but you can see the LEDs anyway)
  • (but the LEDs flash above alarm threshold)
  • typically around ±10% on 10 minute period monitoring
  • 1 x PP3/MN1604 9 volt battery
  • > 24 hours continuous monitoring; approximately 2 years with 15 minutes use per week
  • 1 year
  • Monitor 4
  • S.E. International Inc (USA)
  • $375
  • Easy to use, great general purpose radiation detector for a wide array of applications. Analog display!
  • Geiger–Muller tube, Mica window 1.5-2.0 mg/cm2 thick - diameter 9.1 mm (0.36 in.).
  • Yes, down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%.
  • Yes, at 50 keV with typical 35% detection efficiency at 150 keV with typica 75% detection efficiency
  • Yes, down to 10 keV typical through the window, 40 keV minimum through the case
  • Yes, down to 10 keV typical through the window, 40 keV minimum through the case
  • mRem/h or µSv/, CPM
  • 0-50 mR/hr, 0-500 μSv/hr, 0-50,000 CPM
  • No
  • Analogue
  • typically ±15% of reading (referenced to Cs-137)
  • One 9 Volt alkaline battery
  • up to 2000 hours
  • 1 year limited warranty
  • Inspector USB
  • S.E. International Inc (USA)
  • $580
  • The SEI Inspector USB features large detection window, built in isotope efficiencies, data collection, great sensitivity, backlit display, timer, digital readout, red LED count light and audible tone. Includes padded vinyl case. Nice!
  • Geiger–Muller tube, Mica window, 1.4-2.0 mg/cm2 areal density - diameter 45 mm (1.77 in.).
  • Yes, down to 2 MeV
  • Yes, down to 0.16 MeV; typical detection efficiency at 1 MeV is approx. 25%.
  • Yes, down to 10 KeV
  • Yes
  • mRem/h or µSv/, CPM
  • 0.001-100 mR/hr 0.01-1000 µSv/hr 0-350,000 CPM
  • Can store measurements by using the Observer Software which is sold for 99$. The Observer Software runs on a Windows platform and can be used with the Inspector to record Counts, CPM, and CPS and has the ability to collect, log, and perform statistical analysis on the data received. The data is displayed on a graph as well as digital and analog on-screen meters and can be saved or printed in various ways including a spreadsheet format. The on-screen meters in the software have adjustable settings as well as a settable alarm in CPM. There are both visual and audio indicators, and you can play the meter click through your PC speakers. Windows 95, 98 ME, XP, NT, 2000 compatible. Includes USB connection cable.
  • Digital
  • typically ±15% of reading (referenced to Cs-137)
  • One 9 Volt alkaline battery
  • ~1200 hours
  • 1 year limited warranty
  • Inspector EXP
  • S.E. International Inc (USA)
  • $780
  • It has the same valuable features, small size, and quality of the Inspector with the added versatility of an external probe. Designed to meet the requirements of emergency response personnel.
  • External Geiger–Muller tube. Mica window, 1.4-2.0 mg/cm2 areal density - diameter of window is 45 mm (1.77 in.)
  • Yes, down to 2 MeV
  • Yes, down to 0.16 MeV; typical detection efficiency at 1 MeV is approx. 25%.
  • Yes, down to 10 KeV
  • Yes
  • mRem/h or µSv/, CPM
  • 0.001-100 mR/hr 0.01-1000 µSv/hr 0-350,000 CPM
  • Can store measurements by using the Observer Software which is sold for 99$. The Observer Software runs on a Windows platform and can be used with the Inspector to record Counts, CPM, and CPS and has the ability to collect, log, and perform statistical analysis on the data received. The data is displayed on a graph as well as digital and analog on-screen meters and can be saved or printed in various ways including a spreadsheet format. The on-screen meters in the software have adjustable settings as well as a settable alarm in CPM. There are both visual and audio indicators, and you can play the meter click through your PC speakers. Windows 95, 98 ME, XP, NT, 2000 compatible. Includes USB connection cable.
  • Digital
  • typically ±15% of reading (referenced to Cs-137)
  • One 9 Volt alkaline battery
  • ~1200 hours
  • 1 year limited warranty

 

Radon meters

Monitors which continuously display the levels of the proven carcinogen radioactive radon gas which is accumulated in your home from soil and building materials.

  •   Model
  •   Manufacturer
  •   Average price
  •   Review
  •   Detector type
  •   Units of measurement
  •   Measurement range
  •   Data logging
  •   Display
  •   Backlight Display
  •   Audio alarm
  •   Accuracy
  •   Battery type
  •   Battery life
  •   Carrying case
  •   Calibration service
  •   Warranty
  •   Instructions of use
  • Canary Radon Monitor
  • Corentium (Norway)
  • $250
  • Great device with technologically advanced internal architecture normally used in commercial-type detectors. Continuous display of daily, weekly and long term average radon concentrations.
  • Active - Radon diffusion chamber - Silicon photo-diode
  • Bq/m³ or pCi/L
  • 0-9999 Bq/m³ or 0-500 pCi/L
  • No (but it constantly displays the daily, weekly and yearly average)
  • Digital
  • Measurement Uncertainty at 100Bq / m³: 7 days <20%. 1 month <10%
  • 3 AAA alkaline batteries
  • 3 years
  • The Canary preserves measurement reliability under normal conditions of home use for many years without requiring an annual external calibration. Without annual calibration, the estimated life of the device is 10 years or more.
  • 1 year
  • Safety Siren Pro Series3
  • Family Safety Products (USA)
  • $129
  • Affordable solution for monitoring the radon level in home with an easy-to-read digital display of short or long term average readings + audible alarm when readings are too high.
  • Active - Ionization Chamber- Diffused-junction photodiode
  • pCi/L
  • 0-9999 Bq/m³ or 0-500 pCi/L
  • No (but it constantly displays the weekly average and the averages from last reset or up to 5 years)
  • Digital
  • (when the reading on the long-term reaches a level of 4 pCi/L or greater)
  • Typical accuracy: ± 10%, Guaranteed accuracy: ±20% or ±37 Bq/m³ (the highest one)
  • Plugs into a standard 120-volt household outlet using the attached power cord
  • Can be calibrated from the manufacturer.
  • 1 year

 

Why you should pay attention to our recommendations

Home Biology is run by engineers who perform electromagnetic radiation measurements for a living.

We know what features you to need to look for when buying an EMF meter, so that you can easily and reliably take the necessary measurements, without overspending.

We recommend EMF meters that offer all the basic features with a reasonable price, are simple to use, have easy to read English manuals and/or videos and are sold by trusted sellers.

This website is affiliated with the sellers presented, meaning that we earn a commission every time someone buys a meter coming from our website. This does not in any way affect our judgment when choosing the meters to recommend. Those sellers sell also many other meters which we do not recommend because they do not fill our criteria.

Found another meter?

Please check before you buy if this meter fills all the criteria mentioned here. The frequency range, the measurement span etc. Since we frequently scan the market for new meters it is likely that we have rejected this meter for some reason.

For example, we do not include the popular Trifield meters in the high frequency section because they can only detect very high radiation values. We recommend them only as low frequency meters.

In case you find a meter that does tick all the boxes and has a lower price go ahead and buy it! And we would appreciate if you would let us know so we can add it to our catalogue.

 

What you should know about modern day electrosmog

Why has our exposure to electromagnetic fields increased significantly in recent years? What are the main radiation sources today? How is human health affected? Are we protected by existing legal safety limits? Why many scientists warn about the dangers of uncontrolled use of technology, particularly by pregnant women and children? How to protect yourself.

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How to measure electromagnetic radiation

Why buy an EMF meter? How to choose the right one - Which features to look out for and for which you should avoid overpaying - How to use the meter - Is there a device that measures all types of radiation? Are radiation measurements only needed when there is a significant radiation source nearby? Which radiation values are considered high and where are they usually recorded?

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