How does An EMF detector work?

Devices such as laptops, cellphones, and tablets emit EMF.

With this understanding, you can see why one of the most important devices you need to acquire in this era is a quality EMF meter.The best EMF meters should be accurate, easy to use, and should measure different kinds of radiations. To help you choose one, I have created an EMF meter review. Read on to make a wise buying decision.

EMF Detectors

After spending over 24 hours researching the best EMF meters, we found the following 5 EMF detectors to be the best.

1. Extech EMF450 Multi-Field EMF Meter

What our testers say ...
" You can use it in any area of the home to ensure that the electromagnetic fields are within your operational norms. It’s a great choice for determining the elevated fields in the home and, therefore, prevent various health problems "

How does An EMF detector work?

If you are searching for a reliable three in one EMF detector, you should consider the Extech EMF 450 Multi-Field EMF meter. The radiation detector will measure and display Radio Frequency Strength, Electric Field, and Magnetic Field. It also allows you to choose your desired measurement unit for each ladder.

The small and professional meter is ergonomically designed to fit into your pocket. It’s a good choice for measuring the electromagnetic pollution levels in the environment. It can also be used to measure the emission level from mobile phones, Wi-Fi systems, cordless devices, microwave ovens, power lines, home appliances, and many more.

On top of its ergonomic design, the pocket-sized radiation detector comes with an easy to navigate the menu on a big and well-colored TFT display that shows the results graphically and digitally. With the EMF 540, users can choose from two magnetic units (Tesla or Gauss).

With this EMF meter, you can measure and keep data of up to 20 radio frequencies. The EMF tester comes with 3 AAA batteries and a USB power supply cable to charge the batteries. You can also power it by connecting to any USB portable power supply.

Pros & Cons

  • Compact and ergonomic
  • Fairly accurate
  • Easy to use
  • Different measurement units
  • Batteries drain fast

The only downside of the EMF meter is that the 3 AAA batteries drain fast. It would have been better if it was using a rechargeable lithium battery. Overall, it’s a fairly good device especially when you consider the weight and dimensions.


2. EMF Meter, Advanced GQ EMF-390

With the digital reading of this EMF meter, it will provide you with radiation data that can be downloaded to your PC. It will analyze real changes of each signal in real-time. However, To work perfectly, it has to be pointed to the device being tested. All in all, it’s a good EMF detector that will help you understand the radiation risk in your home.

How does An EMF detector work?

Nothing beats a meter that can test all kinds of EMFs and RFs. One of the options that can do that is the EMF, Meter, Advanced GQ emf-390. This is a topnotch gadget that will allow you to test low-frequency EMF and RFs from mains.

The EMF detector features different modes that enable it to measure the signal in the form of a numerical display or a spectral display for a detailed analysis of the frequency. The EMF detector features memory for storing the results. The stored data can be downloaded using an app or PC to carry out offline analysis. The meter readings are fairly good for RF and Microwave radiation.

The EMF meter comes with multiple sensors that can help detect smart meters EMF and, radiation from appliances such as TVs, microwaves, and refrigerators. It can also detect other sources of radiations such as EMFs from WiFi, 3G, 4G to a maximum of 10 GHz. Therefore, the EMF detector is a good choice for detecting electric and magnetic fields.

The EMF tester provides safety tips that help you to analyze your current situation. It is a good choice for helping you understand the common sources of your EMF radiation. It features a USB port that you can use to connect to an external source of power. If need be, you can connect it to a headphone or microphone.

Pros & Cons

  • Lightweight and portable
  • Shows all kinds of EMF in a single screen
  • Easy to read and understand
  • Safety tips help you understand your danger level
  • Provides fairly accurate data
  • Has a plastic housing
  • Doesn’t detect 360 degrees radiation
  • Not as precise as the professional-grade EMF detectors


3. Extech EMF510 EMF/ELF Meter

What our testers say...
"If you are searching for an EMF meter that can measure an electromagnetic field that ranges from 0 to 2000Mg, and with a resolution of 0.1 mG, you should consider the Extech EMF510 EMF/ELF meter."

It takes measurements using a single axis sensor and over 30 Hz to 300 Hz. The measurement can be in MicroTesla(uT) and milliGaus(mG).

You can see all the measurement data through a backlit digital screen which comes with a data hold feature and a minimum and maximum recording features.

The EMF detector features simple push buttons that allow you to choose from 2 ranges for maximum precision. Batteries and a wrist strap are included in the package, allowing you to mount it on a TR 100 Tripod. However, you will need to buy the mounting tripod separately.

The ergonomic design of the EMF tester enables you to operate the device using one hand while a backlit display enables you to see the data in dimly lit areas.

Pros & Cons

  • Compact and ergonomic design
  • Easy to use
  • Ability to choose from two ranges
  • Accuracy reading of ±5%
  • Saves on battery
  • Not a professional-grade device

The EMF 510 can be a good choice for measuring radiation levels near electrical appliances, power lines, and electrical circuits. The radiation detector will automatically shut after 10 minutes to save on power. While it’s not a professional grade EMF tester, overall, this is a fairly good EMF detector that is worth considering.


4. LATNEX AF-3500 EMF Meter RF Detector

What our testers say...
"One such option that you should consider is the LATNEX AF-350 EMF meter. This is a great EMF detector that takes precise measurements. The EMF detector is highly portable and comes with a protective carry case"

In the recent past, we have seen telecommunications towers getting installed everywhere. This is why you need a good EMF meter that will provide you with a clear picture of the radiation levels.

The device is easy to operate and can be used to measure radiation levels form household appliances, power lines, refrigerators, power transmission lines, computers, air conditioners, electrical wires, computers, and more. It features large buttons and screens that make it easy for you to toggle between RF, Gauss Meter, Electrical, and alarm function. It can be easily used by beginners, seniors, or elderly persons.

The EMF meter can measure low-frequency EMF in a range of 50 to 60 Hz. It can also measure high-frequency RF in a range of 50 MHz to 3.5 Hz. There are two units of measuring the strength of the magnetic field. These are microTesla and MilliGauss. The 2 inch TFT LCD will show all the 3 results simultaneously. You can also hold the data if necessary. There are 5 selections of languages( English, Japanese, Spanish, and Simplified Chinese)

Pros & Cons

  • Accurate and reliable
  • Easy to locate hotspots
  • Compact and lightweight
  • Sturdy soft protective cover
  • No ability to adjust the brightness
  • Has to be kept close to the radiation source

The EMF meter comes with the regular AAA batteries. It also comes with an alarm feature that notifies you when there is a radiation source near you. Overall, this is a great EMF meter that is worth the money.


What our testers say...
"One of the key factors you should consider when searching for an EMF meter is its accuracy. If you need an option that works great and provides accurate results, you should consider the TACKLIFE MET01 EMF meter."

This EMF meter will test the magnetic field radiation and display the units in mg/µt. You even have an option to lock the detected data.

The EMF meter has a large measurement frequency that ranges from 5HZ to 3500 MHz, providing accurate measurements of your daily home appliances such as Mobile phones, TV, home appliances, Induction cooker, electrical wires, refrigerators, etc.

The EMF tester comes with an LCD that can be turned on and off. It also has a flashlight and holes at the back where you can connect a tripod. When the result of your tests gets beyond the safe levels, the sound and light alarm will show notify you. When you buy the EMF detector, you will get one 9V battery and a user manual.

The EMF meter is well made with a rubberized body that doesn’t feel delicate. With the multi-function button, you can do different things with short presses or long presses. When you long-press the button, you will be putting the meter on/off. When you short press the button, you will disable the alarm. It may take time to get used to using one button to do different things. But when you do, it will make it easier to use.

Pros & Cons

  • Easy to use
  • Ergonomic design
  • Accurate
  • Bright LCD
  • Delays for one or two seconds when measuring
  • No RF detector

Factors to consider when choosing the best EMF meters

There are several factors you should consider when choosing the best EMF meters. These include:


If the EMF meter provides inaccurate data, it will be of no good. If you want to nail down the EMF radiation source, you should ensure that you get an accurate meter. Luckily, the EMF testers we have reviewed above have an above-average accuracy level.

Ease of Use

A good EMF detector should provide you with easy to understand readings. Consider how complicated the equipment is, how difficult it is to take the readings, and how practical it is to use this information. Consider if it’s possible to transfer the information from the device to your computer. Does the device come with a digital or analog display? All these are key considerations when choosing the best EMF tester.

Construction and design

You will want to consider the material used to make the EMF meter. Is it durable and sturdily made? When it comes to the design, EMF meters can be categorized into two: The single-axis meters and the 3 axis meters. While the single-axis meters are cheaper, they are slower than the 3 axis meters. In other words, they aren’t as good as the 3 axis meters. On the other hand, the 3 axis meters offer an extensive range and, therefore, provide more accurate results as compared to the single-axis meters.


Consider also the additional features that the best EMF detectors come with. These specs will help to improve performance and, therefore, ensure that you have precise results. For instance, if it comes with a colored LCD screen, you can easily spot the potential risk.

best EMF meters


When trying to track down your source of EMF radiation, one of the key factors you should consider is the sensitivity in and out of your home. A cheap and insensitive EMF meter will not even trace an EMF leak to your microwave oven. A good EMF meter should pick weak signals too and not only the strong ones. This is why you need to pick an EMF tester with high sensitivity.

Your measuring needs

No one meter is a one size need for all measurements. For the best results, you need to ensure that you understand what you are measuring. Is your goal to measure magnetic fields that come from power lines, cars, and appliances? Do you intend to measure electric fields such as extension cords, lighting, and monitor? Do you want to measure the radio waves coming from microwaves, cell towers, or Wi-Fi connections? Different EMF detectors and meters are made for different needs. (we have written extensively for the best generators brands)

Frequency range

The wireless signals are usually transmitted across different frequency ranges. Some of the latest technologies such as 5G cellular have a very high-frequency range. If you will detect such signals, you need to pick an EMF meter that has a wide frequency range.

best EMF meters


Just like any other device, you will want to consider how portable the EMF meter is. You want a meter that you can carry with you when traveling. Therefore, choose a lightweight meter that is also portable and easy to store.(we have written extensively for the best generators brands)


If you choose a battery-operated EMF meter, you want to ensure that it is easy to turn on and off. It should also come with a low battery indicator that shows you when the battery is down.

FAQs on the best EMF meters

  • What do the EMF readings mean?

EMFs are measured in a unit known as volts per meter (V/M). The higher this number is, the stronger the EMF produced by your electrical. To be safe, it’s advisable to ensure that the EMF falls within the ICNIRP’s guidelines.

According to these guidelines, the natural electromagnetic fields, such as those from the sun should be 200 V/M. The limits for power mains that are a distance from the power lines is 100 v/m. If the power mains are close to the power lines, the limits should be 10,000 v/m. The maximum for microwave ovens is 14 v/m.

  • How can you neutralize EMF radiation?

There are several measures you can use to end the EMF radiations. These include:

  • Buy a cellphone case that can protect you from EMF radiation
  • Ensure that your body doesn’t get into contact with a computer or cellphone
  • Get rid of smart meters
  • Get grounded
  • Use healing crystals
  • Spend more time in nature
  • Does the EMF radiation go through a wall?

Like it’s the case with electric fields, the magnetic fields are usually stronger at their source. Their strength decreases with distance. However, magnetic fields can’t be blocked by materials such as walls.

  • Can a phone be used as an EMF meter?

Smartphone apps can only detect EMF coming from communication equipment like Bluetooth, 2G, 3G, 4G technologies. They cannot detect other EMF sources.

  • How does An EMF detector work?

An EMF detector works by detecting the fields that are emitted by electrically charged objects.

  • What materials can I use to block EMF?

Materials such as copper, aluminum, and Mylar can attenuate EMF radiation as they scatter or absorb the photos when they pass through them.

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  • Why do readings from different Meters differ?

Two different meters can give different results for several reasons. In a real-life situation, you will rarely find a single signal. That means you will be exposed to a mixture of signals from different sources. The frequencies, orientations, and digital characteristics of these signals will be different. The readouts will depend on how a meter interprets these signals.

  • What units should I Use to measure radio frequency?

When measuring RF, different units can be used. When measuring low levels of RF radiation, it’s advisable to use small units like V/M. If, on the other hand, there are huge amounts of radiation, you can consider using bigger units like mW/cm2.

  • What distance from the source is a meter effective?

All EMF detectors have a zero feet range. Therefore, all-electric field meters, gauss meters, and R/F microwave meters can only measure the field’s strength at the place where the meter is located. However, the effectiveness of the meter will depend on sensitivity. For instance, if a gauss meter has a sensitivity of 0.1 mG, it will be more effective than another one which can only detect a minimum of 1.3 mG. A more sensitive meter can be effectively used far away from the field source but it will still measure the field at the meter’s location.

Final thoughts

Scientists suggest that there is a weak connection between the low –level EMF exposure and health challenges such as cancer. On top of this, high-level exposure to EMF can cause various physiological and neurological issues such as disruption of the human nerve function.

You don’t have to be afraid to use a cellphone, microwave, or Wi-fi as low exposure to EMF isn’t harmful. But the risk of high-frequency exposure is high and you need to be aware of its existence. Instead of worrying about exposure, you need to be aware of it and reduce your exposure.

One of the first steps towards reducing your exposure is by getting yourself an EMF reader. You will want to ensure that you choose an option that is accurate and will meet your needs.

Fortunately, we have narrowed down your option to the best 5 EMF testers available. With one of the above options, you can pin down your source of EMF.

This EMF meter works great and will show you a fairly safe distance to stand from the radiation source to keep you safe. Its biggest downside is that it has no RF detector. But all in all, it’s a great EMF meter that is worth buying.

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