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EMF Detector, Detect All 3 Types of Electromagnetic Radiation Field in 1 EMF Meter for Cell Towers, and Smart Meters, EMF Reader for Home, Office

4.4 4.4 out of 5 stars 760 ratings
$31.19
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Model: RD630
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Purchase options and add-ons

  • Three types: EMF meters detects three yypes of EMF pollution, AC magnetic, AC electric, and microwave
  • Auto Sound and Tricolor Alarm: Tricolor LCD will turn green, yellow, and red, automatic alarm triggers above the safe value (250 V/m or 5 uT/50 mG or 50 mW/㎡
  • Easy to Use: Operate with one hand and move or make field measurements(You have to hold the EMF METER to make a test)
  • Mute Function: The device can be muted to prevent scaring ghosts away. or when you’re testing some quiet areas, you can turn off the buzzer first, avoid disturbing the others
  • The device features an automatic shutdown after 15 minutes to save battery life. If you need continuous measurement, you can disable the APO function: Press and hold the "APO" button to turn off the auto power-off feature
  • Illuminated Screen: Designed with an illuminated Tri LCD screen to aid ghost hunting in the dark
  • When measuring the electric field, it is essential to hold the device in your hand. This is because the human body acts as a grounding source, ensuring more accurate readings. If the device is placed on a surface, the measurements may be inaccurate due to environmental interference
› See more product details

Frequently bought together

EMF Detector, Detect All 3 Types of Electromagnetic Radiation Field in 1 EMF Meter for Cell Towers, and Smart Meters, EMF Rea
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Product details

  • Product Dimensions ‏ : ‎ 4.72 x 1.97 x 1.5 inches; 6.88 ounces
  • Item model number ‏ : ‎ RD630
  • Batteries ‏ : ‎ 1 Lithium Polymer batteries required. (included)
  • Date First Available ‏ : ‎ December 4, 2023
  • Manufacturer ‏ : ‎ SHENZHEN REDDRAGON INSTRUMENTS CO.,LTD
  • ASIN ‏ : ‎ B0CPF7GC3L
  • Country of Origin ‏ : ‎ China
  • Customer Reviews:
    4.4 4.4 out of 5 stars 760 ratings

From the brand

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Product Description

emf meter

Detects All Three Types of EMF Pollution: AC magnetic, AC electric, and R_field microwave.

EMF Meter Technical Parameter

(EMF Meter)Sensitivity EF(Electric Fields):1V/m ; MF(Magnetic Fields) :0.1mG or 0.01uT ; ( Frequency Field):0.1mW/m²
Measuring range of the EMF EF:1-1999V/m ; MF:0.1-999.9mG or 0.01-99.99uT ; R—Field:0.1-999.99mW/m²
Measuremet Accuracy ±5%
Bandwidth 40Hz-10GHz
Temperature/Humidity temperature :-10~+60'C; humidity:<80%RH
Battery 1*9V Battery
Size 147*68.5*28mm
Weight 132g
emf meter

  • Sensitive for measuring the signal from mobile phones and so on
  • Specific frequency information is NOT displayed.

emf

  • You have to hold the EMF METER to make a test

Here are some reasons to use an EMF meter

- There is a good reason I always suggest people purchase an EMF meter once they understand how dangerous long-term exposure to EMF radiation can be.

✔ To Understand Your Home and Office Details

- It eliminates guesswork when testing EMF levels in our living room and office, where we spend a significant amount of time.

✔ To Lead a Long and Safe Life

- You can make informed decisions and take effective preventive measures against electromagnetic radiation based on the test results.

emf
emf

EMF Meter Radio Frequency Field Detector

Detects 2G,3G,4G and 5G cell tower signal level and up to 8Ghz

emf_meter

Auto-Off

Long press "APO"， till the APO reads on display

it will shut down after 15 minutes automatically

emf

Hold Function

Press"HOLD" freezes measurement on screen for hard to see areas.

emf

Mute Function:

The device can be muted to prevent scaring ghosts away.

emf

Unit Switch

Unit switch fron μT to mG

and automatic alarm above safe value 5uT/50mG

emf meter

What's in the box

  • 1*EMF METER

    • Looking for specific info?

    Customer reviews

    4.4 out of 5 stars
    760 global ratings

    Review this product

    Share your thoughts with other customers
    Write a customer review

    Customers say

    Customers find the product useful and easy to use for detecting radiation frequencies of various types. They find it reliable and helpful for small DIY home electrical safety projects. The bright display is also appreciated. Many customers appreciate its value for money and quality. However, some have differing views on accuracy and sensitivity.

    AI-generated from the text of customer reviews

    Select to learn more

    FunctionalityEase of useRadiation detectionUtilityValue for moneyQualityAccuracySensitivity
    29 customers mention "Functionality"26 positive3 negative

    Customers like the product's functionality. They say it works well and is easy to read. It performs as expected and is suitable for small DIY home electrical safety projects.

    "...This bad baby works and if you want to know what radiation you and your family are being subjected to I’d say this is a must and not bad for the..." Read more

    "...While there’s room for improvement in the packaging, the device itself performs well...." Read more

    "Works...don't know how sensitive it is but it works" Read more

    "Great Product!!! I would highly suggestion an anti-shatter case." Read more

    15 customers mention "Ease of use"15 positive0 negative

    Customers find the product easy to use and understand. They appreciate the well-written manuals.

    "...It’s easy to read, and the ability to change measurements (e.g., milligauss or microtesla) is a useful feature...." Read more

    "Easy to read, and is okay on batteries. the sensor does have some limitations since it is built into the case...." Read more

    "...Overall, the backlit color changing is neat and makes this intuitive to use...." Read more

    "Well written manuals seem to be the most difficult thing to provide...." Read more

    15 customers mention "Radiation detection"11 positive4 negative

    Customers appreciate the radiation detection capability of the product. They find it helpful for detecting various radiation frequencies and providing essential information about electromagnetic radiation. The device is reliable, easy to use, and provides useful information about wave signals, including radio waves, magnetic fields, electrical and network frequencies, and electric field radiation.

    "...It’s reliable, easy to use, and provides essential information about electromagnetic radiation...." Read more

    "...This device/tool can measure the strength of all these wave signals. Now, the eye-opening part...." Read more

    "...while plugged up and they all gave red warnings meaning high levels of radiation!..." Read more

    "This device is pretty helpful to detect the radiation frequencies of various types...." Read more

    13 customers mention "Utility"13 positive0 negative

    Customers find the product useful and informative for everyday life. They appreciate its easy-to-use, bright display and reliable features. The product helps them avoid hot spots around town and provides peace of mind.

    "...Overall, the EMF Detector has been a valuable addition to my toolkit...." Read more

    "...All my friends have borrowed it and thought it was very interesting. Glad I purchased it." Read more

    "Great general purpose tool to have and useful / informative in every day life too. Worked better than expected...." Read more

    "...So I'm thinking I'm going to keep this gadget around. It's very interesting to use. Very eye opening." Read more

    13 customers mention "Value for money"13 positive0 negative

    Customers appreciate the product's value for money. They say it's a good investment and it tells them how much and whether it's at a safe level, alert, or avoid level.

    "...your family are being subjected to I’d say this is a must and not bad for the price. It does beep but I turned the sound off...." Read more

    "Seem to work well for the price" Read more

    "...Worked better than expected. Surprisingly sensitive and seemingly accurate for the price it is a good value" Read more

    "...It gives you all 3 readings at the same time. It lets you know how much and indicates if it is at a safe level, alert, or avoid...." Read more

    10 customers mention "Quality"8 positive2 negative

    Customers appreciate the product's quality. They find it reliable, durable, and a good product for the price. However, some reviewers suggest an anti-shatter case.

    "...It’s reliable, easy to use, and provides essential information about electromagnetic radiation...." Read more

    "Great Product!!! I would highly suggestion an anti-shatter case." Read more

    "Easy reading, battery long lasting, size is what you would expect, great quality...." Read more

    "...Definitely very low sensitivity. Cheap, low quality, not accurate. Misleading; Inaccurate product descriptions. Do not waste your money." Read more

    21 customers mention "Accuracy"12 positive9 negative

    Customers have mixed opinions about the meter's accuracy. Some find it reliable and useful for detecting EMFs from different appliances and how close you can get before reaching a high level. Others mention inaccurate readings, low or no readings, and questionable calibration.

    "...The GOOD news, this meter can detect the distances at which the signals can be dangerous, AND Faraday cloth, or blankets can totally block all these..." Read more

    "...Weaker emfs will not read unless detector is very close." Read more

    "Not super sensitive but a good indicator of where radio frequencies are coming from...." Read more

    "...as I went closer towards it in the backyard, there was minor spike in the reading...." Read more

    9 customers mention "Sensitivity"5 positive4 negative

    Customers have different views on the sensitivity of the product. Some find it very sensitive and accurate, with no more tingling in their fingers. However, others say it has low sensitivity, low quality, and inaccurate measurements. There are also complaints about the device constantly going off and not stopping at zero.

    "...However, the device is still useful to get a relative feel of the strength of various emission sources." Read more

    "Easy to read, and is okay on batteries. the sensor does have some limitations since it is built into the case...." Read more

    "...Worked better than expected. Surprisingly sensitive and seemingly accurate for the price it is a good value" Read more

    "Not super sensitive but a good indicator of where radio frequencies are coming from...." Read more

    Works well
    4 out of 5 stars
    Works well
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    Top reviews from the United States

    • LadyRomar
      5.0 out of 5 stars Worth every penny if you want to know what ☢️ are throughout your home
      Reviewed in the United States on March 11, 2025
      Model: RD630Verified Purchase
      The media could not be loaded.
      What I’ve learned from getting this is DON’T use your devices while plugged up to the charger! My MacBook let off a red alert while plugged into the charger vs green (0) when not charging. I tested all of my Apple products and computers while plugged up and they all gave red warnings meaning high levels of radiation! ☢️ This was alarming to me because my kids use there windows based pcs while on the charger so I stopped that! Another thing that tested high were my Himalayan salt lamps!! Big shock to me and saddening as these are supposed to purify the air.

      This bad baby works and if you want to know what radiation you and your family are being subjected to I’d say this is a must and not bad for the price. It does beep but I turned the sound off.
      I also tested the electrical component of my electric desk that allows me to alternate between sitting and standing and it gave a RED!!

      Green-safe
      Orange-alert
      Red-AVOID!!
      Helpful
       Report
    • Roberto Morales
      5.0 out of 5 stars Works great
      Reviewed in the United States on February 28, 2025
      Model: RD637Verified Purchase
      Definitely a must have.
      Helpful
       Report
    • Ryan Zabka
      4.0 out of 5 stars Reliable EMF Meter with Useful Features
      Reviewed in the United States on July 20, 2024
      Model: RD630Verified Purchase
      I recently purchased the EMF Detector to assess electromagnetic radiation fields in my home and office while I tinker on projects. Here’s my experience with the product:

      Timely Delivery: The product arrived on time, which is always appreciated.

      Packaging: While the package was slightly damaged, the device itself was unharmed. It would be great if the packaging could be improved to prevent any damage during transit.

      Battery Reminder: One thing to note is that you’ll need to buy batteries separately. Make sure to have them ready when your EMF Detector arrives.

      Color Display and Measurement Options: I really like the different color display on this device. It’s easy to read, and the ability to change measurements (e.g., milligauss or microtesla) is a useful feature.

      Alert Indicators: The color-coded alert indicators are a standout feature. Here’s what they mean:
      Green: Everything is good and safe.
      Yellow: Elevated readings—be cautious.
      Red: Dangerous levels—leave the area or take additional safety measures.

      Multiple Uses: I purchased this tool for various reasons:
      Setting up a temporary Faraday cage.
      Measuring homemade antenna functionality.
      And, of course, ghost hunting in my house!
      Overall, the EMF Detector has been a valuable addition to my toolkit. It’s reliable, easy to use, and provides essential information about electromagnetic radiation. While there’s room for improvement in the packaging, the device itself performs well.

      I hope this review helps potential buyers make an informed decision! 👻
      65 people found this helpful
      Helpful
       Report
    • Michael
      5.0 out of 5 stars Good for most things
      Reviewed in the United States on February 25, 2025
      Model: RD630Verified Purchase
      Easy to read, and is okay on batteries. the sensor does have some limitations since it is built into the case. meaning you have to have the room for the entire unit to correctly get readings. Weaker emfs will not read unless detector is very close.
      One person found this helpful
      Helpful
       Report
    • F. Adamski
      5.0 out of 5 stars An eye opener if you are unaware of how strong Wi-fi and electromagnetic fields can be.
      Reviewed in the United States on December 18, 2023
      Model: RD630WVerified Purchase
      A concerning, but widely unknown fact is how strong cell phone signals, Wi-fi, and electromagnetic fields have become over the last three decades. As any competent Biology professor will tell you, a human body is an electro-chemical machine utilizing electrical impulses through nerves to move muscles, feel pain and pressure. Chemical actions within a body regulate cellular activity, hormones, break down food consumed into usable components, etc. Interference with those vital function can and do cause problems.

      Keeping all this in mind, Cell phone signals and Wi-fi utilize wave energy to operate. Wave energy can range from microwave, x-ray, radio waves, infrared and ultraviolet waves, essentially across the entire wave spectrum. For example, a Microwave oven uses microwave energy to make molecules vibrate rapidly creating heat, that cooks food, such as 'meat' etc. Meat is 'muscle' tissue. The metal sheet with small holes in the glass of a microwave creates a 'Faraday shield' through which microwave signals cannot pass.

      As the wave strength of Cell phone signals and Wi-fi increases, the potential for disruption in Human cells increases exponentially. This is also true for Electromagnetic fields. Computers generate powerful magnetic fields. The strength of these fields decreases rapidly over distance, so the closer to the source, the stronger the magnetic energy.

      Cell phones contain very powerful, miniaturized computers! They therefore create powerful electromagnetic fields.

      This device/tool can measure the strength of all these wave signals.

      Now, the eye-opening part. Turn the device on while standing away from your cell phone, W-fi router, laptop, or Apple computer. You will notice that the various type of signal strengths displayed on the meter either reads zero, or very, very low from background sources.

      Then move the device closer and closer to the cell phone, computer, router etc., and watch the numbers (signal strength energy) skyrocket. As those numbers increase a series of lights change from green to yellow, and the red light meaning extremely powerful.

      I have measured my iPhone 15 Pro, our whole house Netgear router, and pc.

      For all of them the signal strength goes 'off the charts' as you get close. Within two to six inches of the cell phone the cell signal, microwave band, and electromagnetic readings are alarming! The other devices are the same - alarming.

      Imagine the potential harm these can do to at the cellular level in your body (such as your brain), if held close for extended periods of time, or continual exposure such as having your phone on your hip all day, or in your pant pockets, close to reproductive organs. Think microwave cooking type damage.

      The GOOD news, this meter can detect the distances at which the signals can be dangerous, AND Faraday cloth, or blankets can totally block all these signals. Do some research and get some of these Faraday shield materials to protect yourself, and your children.

      There are many types of Faraday shielding materials such as very light cloth, and blankets sold on Amazon. A word to the wise . . .
      204 people found this helpful
      Helpful
       Report

    Top reviews from other countries

    Translate all reviews to English
    • Kent S.
      5.0 out of 5 stars The product works great and is fairly durable!
      Reviewed in Canada on January 31, 2025
      Model: RD630WVerified Purchase
      The product is pretty sensitive and is a good item for checking the safe areas within you're house or work areas, and having the extra radio detection function is helpful too when it comes to checking how hazardous your cellphones and walkie talkies high powered transmission lines or towers are, I didn't get that high of a reading from my Wifi router though!
      Report
    • Mehrdad Pazooki
      1.0 out of 5 stars No funciona
      Reviewed in Mexico on July 23, 2024
      Model: RD630Verified Purchase
      Sigue mostrando cero. Ninguna señal. Quiero que me devuelvan el dinero.
      Customer image
      Mehrdad Pazooki
      1.0 out of 5 stars
      No funciona

      Reviewed in Mexico on July 23, 2024
      Sigue mostrando cero. Ninguna señal. Quiero que me devuelvan el dinero.
      Images in this review
      Customer image
      Report
    • Amazon Kunde
      5.0 out of 5 stars Funktioniert
      Reviewed in Germany on February 24, 2025
      Model: RD637Verified Purchase
      Funktioniert gut.
      Man kann sogar den Kabelverlauf in der Wand finden.
      Report
    • Cliente Amazon
      5.0 out of 5 stars Confrontato con strumento professionale
      Reviewed in Italy on January 31, 2025
      Model: RD630WVerified Purchase
      Strumento curato, anche nella confezione e nel manuale di istruzione in italiano, inglese e tedesco. Provato in prossimità di una linea elettrica a 380 kV ha dato le misure ragionevoli, sia per il campo elettrico che magnetico. Anche un prossimità di un monitor LCD consente di individuare la posizione del trasformatore switching. Anche la parte RF pare funzionare, ma non ho potuto fare confronti. Ho preferito questo modello 630W con batteria a 9 V (fornita) rispetto a quella ricaricabile, perché comunque lo userò poco e la preferisco sostituibile.
      Aggiornamento
      Confrontato con uno strumento professionale dal costo 10 volte superiore, mostra valori del campo elettrico molto simili, per quello magnetico molto simili ma solo a partire da intensità superiori a 150-200 nT, mentre per valori inferiori la lettura scende rapidamente a zero, anche per campi dell'ordine dei 100 nT. Questo strumento fornisce una lettura isotropica del campo magnetico (mediando sui tre assi), coerentemente alla struttura dei sensori, uno per asse. Lo strumento professionale di confronto invece fornisce la lettura su un unico asse. Il giudizio rimane molto positivo, ma va evidenziato che campi deboli, seppur in teoria misurabili, non vengono visulizzati. Considerando che la soglia di attenzione è 200 nT, lo strumento rimane utile. Allego foto di confronto del campo elettrico e magnetico, e una dello strumento aperto che ne mostra la struttura.
      Customer image
      Cliente Amazon
      5.0 out of 5 stars
      Confrontato con strumento professionale

      Reviewed in Italy on January 31, 2025
      Strumento curato, anche nella confezione e nel manuale di istruzione in italiano, inglese e tedesco. Provato in prossimità di una linea elettrica a 380 kV ha dato le misure ragionevoli, sia per il campo elettrico che magnetico. Anche un prossimità di un monitor LCD consente di individuare la posizione del trasformatore switching. Anche la parte RF pare funzionare, ma non ho potuto fare confronti. Ho preferito questo modello 630W con batteria a 9 V (fornita) rispetto a quella ricaricabile, perché comunque lo userò poco e la preferisco sostituibile.
      Aggiornamento
      Confrontato con uno strumento professionale dal costo 10 volte superiore, mostra valori del campo elettrico molto simili, per quello magnetico molto simili ma solo a partire da intensità superiori a 150-200 nT, mentre per valori inferiori la lettura scende rapidamente a zero, anche per campi dell'ordine dei 100 nT. Questo strumento fornisce una lettura isotropica del campo magnetico (mediando sui tre assi), coerentemente alla struttura dei sensori, uno per asse. Lo strumento professionale di confronto invece fornisce la lettura su un unico asse. Il giudizio rimane molto positivo, ma va evidenziato che campi deboli, seppur in teoria misurabili, non vengono visulizzati. Considerando che la soglia di attenzione è 200 nT, lo strumento rimane utile. Allego foto di confronto del campo elettrico e magnetico, e una dello strumento aperto che ne mostra la struttura.
      Images in this review
      Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
      Report
    • sam
      5.0 out of 5 stars Convenient and easy to use.
      Reviewed in India on January 10, 2025
      Model: RD630Verified Purchase
      Gives readings for all 3 EMF radiations in one shot with safe/alert/avoid lights.
      Report