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The 8 Best magnetic field meters of 2024

Are you trying to find magnetic field meters among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling magnetic field meters on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 30 hours of research and did 30 magnetic field meters tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best magnetic field meters you can buy today

SaleNo. 1
ERICKHILL EMF Meter, Rechargeable Digital Electromagnetic Field Radiation Detector Hand-held Digital LCD EMF Detector, Great Tester for Home EMF Inspections, Office, Outdoor and Ghost Hunting
  • PRECISE MEASUREMENT: Equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on the clear LCD digital display after processing by control micro-chip. Testing magnetic field radiation with optional units mG/µT, the electric field with unit V/m. This emf meter can not test the RF value.
  • SOUND-LIGHT ALARM: When the testing result exceeds the value(0.4µT (4mG) or 40V/m), the screen will turn red and the indicator will be flashing, and the buzzer will alarm. If you’re testing some quiet areas, you can close the buzzer first, avoid disturbing the others.
  • MULTIFUNCTION: Testing average or peak value(Maximum) reading, and one key hold the data for a view. Large and back-light LCD is clear for viewing. Auto power off after 5 minutes without operation. WIDELY APPLICATIONS: Mainly used for testing TV, computer, printer, microwave oven, refrigerator, cell towers, for low-frequency home appliances, and ghost hunting, etc.
  • CUSTOMER SERVICE: ERICKHILL strives to create professional and high-quality meter. We provide a 36-month after-sale service, lifetime technical support. If you have any questions, please feel free to contact us, our professional after-sales team will solve your problem in time.
No. 2
TriField EMF Meter Detects Radio, Magnetic & Electric Fields - For 5G, Cell Towers, WiFi, Bluetooth, Smart Meters
2,937 Consomer Reviews
TriField EMF Meter Detects Radio, Magnetic & Electric Fields - For 5G, Cell Towers, WiFi, Bluetooth, Smart Meters
  • Detects all three types of EMF pollution: Magnetic, Electric, and Radio/Microwave Fields
  • Displays field signal level, peak level, and a fast indicator bar in the upper left (for RF pulse monitoring)
  • Measures 4G and 5G cell phones, cell towers, WiFi routers, Bluetooth, AC Powerlines, and Smart Meters
  • Dual Mode: Standard or Weighted Frequency Responses (Weighted emphasizes the effects on the body)
  • Manufactured in USA by AlphaLab,Inc; 1-Year Manufacturer Warranty
No. 3
Magnetism Detector
  • RESIDUAL MAGNETISM ONLY, NOT INTENDED TO MEASURE STRENGTH OF MAGNETS,Inexpensive, Pocket Size, Light in Weight, Ruggedly constructed
  • Instruction Sheet Downloadable Above
SaleNo. 4
EMF Meter, 3 in1 Electromagnetic Electric Magnetic Radio Frequency Field Detector Hand-held Digital LCD EMF Detector, Great Tester for Home EMF Inspections, Office, Outdoor with a 9V Battery (RD630)
  • ✅EMF Detector Detects All Three Types of EMF Pollution: AC magnetic, AC electric, and RF/microwave
  • ✅Auto Sound-light Alarm: Tricolor indicator bar will turn green, yellow, and red; Automatic alarm triggers above the safe value (40V/m or 0.4μT/4mG or 5 mW/㎡). But the Specific frequency information is NOT displayed.
  • ✅Illuminated Screen: Designed with an illuminated LCD screen to aid ghost hunting in the dark.
  • ✅Operate with one hand and move or make field measurements.(You have to hold the EMF METET 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.
  • ✅In addiction , Automatically shut down after 15 minutes without operation.
  • ✅What you will get: 1* EMF Reader; 1* 9v Battery; 1*Manual; 1*soft carry bag.
  • ✅Provides Worry-Free Returns! If our product doesn't perform well or if any problems arise, please kindly contact customer service.
No. 5
Handheld Digital Tesla Meter High Precision Gaussmeter Fluxmeter Surface Magnetic Field Tester with Probe 0-2400mT
  • Power Supply: 1PCS 9V battery(not included)
  • Range: 200mT, 2000mT(Automatic range switching)
  • Minimum Resoltion: 10μT; 4 digits display
  • Measurement Rrange: 0-2400mT(24000GS)
  • Accuracy: 0-1000mT(±2%); 1000mT-2400mT(±5%)
No. 6
GLTL Gaussmeter Tesla Meter Surface Magnetic Field Tester with N/S Function + Metal Probe
  • Application: Handheld digital WT103 gauss meter used to measure the magnetic field of the permanent magnet material surface, DC motors, speakers, magnetic separator, permanent magnetic separator magnetic field demagnetization and the leakage of the magnetic field, parts machining residual magnetic field. Measuring range: 0 to 200mT milli-Tesla of - 2000mT milli-Tesla
  • Basic error: 0-1000mT(±2%); 1000mT-2400mT(±5%)
  • Ambient temperature: 5℃~40℃ Relative Humidity: 20%~80% (non-condensing)
  • Package Included: 1 x WT103 Gaussmeter Tesla meter; 1 x User Manual; 1 x Metal Probe;1 x DC Adapter ( includes AAA*3 Batteries )
No. 7
NOPWOK EMF Meter Rechargeable Electromagnetic Field Radiation Detector Handheld Digital LCD EMF Reader Temperature Measure, Tester for Home Inspections, Outdoor and Ghost Hunting
  • 【Accurate Measurement】The EMF meter detector has built-in electromagnetic radiation sensor, which can display the radiation value on a clear LCD digital display by controlling the microchip. Optional units mG/µT for testing magnetic field radiation, V/m for testing electric field.
  • 【Sound Light Alarm】When the electric field value exceeds 40V/m, and the magnetic field exceeds 0.4µT or 4mG, the LED screen turns red, the indicator light flashes, and the buzzer alarms. If you find it noisy, you can long press the "AVG/VPP" button to turn off the sound.
  • 【Widely Used】EMF meters can measure electromagnetic fields, identify equipment that generates high radiation, and enable you to make decisions about limiting exposure. Mainly testing magnetic and electric fields, such as testing TVs, computers, refrigerators, printers, microwave ovens, cell phone towers, low-frequency appliances, ghost hunting, etc.
  • 【Multiple Functions】Short press "AVG/VPP" to switch test average or peak readings, short press "℃/℉" button to switch temperature units °F and °C. Detector will automatically shut down after 5 minutes without operation.
  • 【What You Get】: 1 x EMF Radiation Detector + 1 x USB cable + Instruction manual. Feel free to contact us at any time, guaranteed response within 24 hours.
No. 8
JahyShow LED EMF Meter Magnetic Field Detector Ghost Hunting Paranormal Equipment Tester Portable Counter
  • ✅ The range of emf meters used for ghost hunting helps to measure electromagnetic fields to identify devices that generate high radiation, enabling users to make decisions about limiting exposure.
  • ✅ Easy-to-read multi-segment led display. The detector is associated with the location and it is reported that the unexplained phenomenon is related to radiation.
  • ✅ The Ghost Hunting Detector operates on a single battery and reports emf measurements in the 5 milligauss range.
  • ✅ Measuring a variety of emfs from 50 Hz to 20,000 Hz, it can register mobile phones within 2 feet. Emf levels are measured to prevent potentially harmful long-term overexposure to emf.
No. 9
EMF Meter, Votery Rechargeable Electromagnetic Field Radiation Detector Digital EMF Detector with LCD, Temperature Measure, Hand-held Magnetic Field Detector for Home, Office, Outdoor
  • Widely Used: The EMF meter detector is mainly used for testing TV, computer, microwave oven, cell towers, low-frequency home appliances, etc.
  • Accurate Measurement: Equipped with a built-in electromagnetic radiation sensor, users can determine the radiation value of the environment. Optional units mG/µT for testing magnetic field radiation, V/m for testing electric field.
  • Sound Light Alarm: Measuring various electromagnetic fields from 4Hz to 3.5GHz. When the electric field value exceeds 40V/m, and the magnetic field exceeds 0.4µT or 4mG, the indicator light turn green and flashes, and the buzzer alarms. Tp avoid disturbing the others, you can close the buzzer first.
  • Multifunction: The flashlight makes it easy to use in the dark. Auto power off after 5 minutes without operation.
  • Package Includes: 1 x EMF Radiation Detector, 2 x 1.5V AAA Batteries, 1 x Instruction manual.
SaleNo. 10
Olmlmo Emf Meter,Electric Field, Radio Frequency (Rf) Field, Magnetic Field Strength Meter,Rechargeable Radiation Detector for 5g Cell Tower, WiFi Signal Detector,Emf Inspections,Ghost Hunting
  • Measures All Emfs:Olmlmo Emf Meter measures magnetic, electric, and radio frequency radiation, when some other meters did not. If you care about EMF radiation in your home, you need to be able to measure all types of radiation.EMF Meter equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on an LCD screen after processing by the micro-control chip
  • User-Friendly & Scenes : Whether you are an expert on EMF radiation ,or you’re just starting out,our meters work well for both.RF function can detect 5G signal and radio frequency up to 10Ghz. EF, and MF functions can measure electromagnetic radiation emitted by household appliances such as TV, induction cooker, rice cooker, refrigerator, computers, wires.RF meters have long been popular because simple to operate but also have the accuracy and functionality that professionals are looking for
  • Multifunction :Testing average, peak value, and Maximum reading, and one key hold the data for a view. Large and back-light LCD is clear for viewing. Auto power off after 15 minutes without operation.Black and white two-color display mode. Sound and light warnings to remind you of the safe range.
  • Display & Audio : The Olmlmo emf meter provides an enormous amount of information in a way that is simple to find and easy to understand,compairing with any of the other EMF meters on the market.if you’re trying to determine actual EMF radiation levels of certain things, you will want the field indicator, if you are just trying to move around your home and locate EMF radiation sources, the audio is fantastic. Using the audio, you don’t even need to look at the display
  • Package List :1 * EMF Meter, 1 * charging cable, and 1 * User manual; If you have any questions, please contact us, our professional after-sales team will solve your problem in time NOTE: 3-IN-1 EMF METER CANNOT TEST TEMPERATURE, NUCLEAR RADIATION, AND MAGNETISM. (SUPPORTS TESTING OF ELECTRIC OR MAGNETIC FIELDS GENERATED BY THE ELECTRONIC DEVICE ITSELF OR DURING USE. NOT MAGNETISM. SUCH AS MAGNETS)
No. 11
AC Magnetic Field Meter
  • Save graph data to file.
  • Units of Gauss or microTesla.
  • Peak indicators for the frequency spectrum.
  • English (Publication Language)
SaleNo. 12
Digital EMF Tester Electric and Magnetic Field Radiation Detector Temperature Measure with Color-Screen Display and Rechargeable Battery Handheld Tool
  • Electric Field Radiaition: (1)Range: 1V/m-1999V/m (2)Accuracy: 1V/m (3)Alarm threshold: 40V/m
  • Magnetic Field Radiaition: (1)Range: 0.01μT-99.99μT (2)Accuracy: 0.01μT (3)Alarm threshold: 0.4μT
  • FEATURES: Sound and light alarm (when the test result exceeds the safe value), Data Hold feature, Temperature measurement and with Backight function
  • POWER SOURCE: Comes with USB Cable, Rechargeable battery strenght indicator is display on the screen and the meter will automatically shut down after 5 minutes of no operation
  • APPLICATION: Electromagnetic radiation monitoring (House and apartment, office, outdoor and industrial site), Electromagnetic radiation test (Mobile phone, computer, TV set, refrigerator and high voltage cable radiation test), Radiation protection product test (Test effects of radiation-proof clothes, radiation proof film and other radiation prevention products)
No. 13
3 in 1 EMF Meter,EMF Reader,Electromagnetic Field Radiation Detector,EMF Tester for Home,EMF Detector with sound light alarm,Ghost Hunting Equipmetent
86 Consomer Reviews
3 in 1 EMF Meter,EMF Reader,Electromagnetic Field Radiation Detector,EMF Tester for Home,EMF Detector with sound light alarm,Ghost Hunting Equipmetent
  • 【Widely used】Home, office, outdoor, industrial;Mobile phone, computer,TV, refrigerator high voltage line radiation detection;Test the effect of protective equipment such as radiation protective clothing and radiation protective film
  • 【3 in 1 EMF meter】One machine for three purposes, simultaneously detecting electric field, magnetic field radiation and temperature.Short press "MODE" key, the electric/magnetic field and ℃/℉ function conversion
  • 【Alarm】 Exceeding alarm threshold (electric field: 40V/m; Magnetic field: 0.4μT), the instrument will sound, light, screen display at the same time.【Alarm】 Exceeding alarm threshold (electric field: 40V/m; Magnetic field: 0.4μT), the instrument will sound, light, screen display at the same time
  • 【Hold data】The instrument reading will be locked by pressing the HOLD key, and the "H" symbol will be displayed on the screen. If there is no need to lock, press the HOLD key again
  • 【Graphic display】LCD graphic display of radiation value trend.Radiation assessment, to remind you whether the current radiation value is safe
  • 【MAX/MIN/AVG value】During measurement, press "RANGE" to switch between average value, maximum value and minimum value in turn
  • 【Easy to use】Fashion appearance, easy to operate with one hand, easy to move or field measurement
No. 14
EMF Meter,CHNADKS Upgrated 3-in-1 Rechargeable Electromagnetic Field Radiation Detector for EF RF MF,Handheld Digital EMF Detector with LCD for Home&Office EMF Inspections, and Ghost Hunting
  • 💚Versatile Precise Measurements: The EM-101 is a EMF meter for measure electric field strength, radiation power, magnetic field strength, and polarity of static magnetic fields with an effective measurement range of 50MHz-3.5GHz. It also provides a numerical reference for anomalous magnetic field fluctuations in the surrounding area (psychic magnetic fields).
  • 💚Easy to Use: The rechargeable EMF device features a TFT 2.0 color screen with a graphical menu for easy and intuitive use. Sound and flash alert can be options, with adjustable alarm thresholds.Electric and magnetic field waveform display modes for better detection of ghost detection trails.
  • 💚Portable Design: The electromagnetic radation detector has a protection level of IP3X and is built to last. Its dimensions are 4.64x 2x0.78inch,weighs only 67g, making it easy to carry and use in a variety of settings.
  • 💚Widely used:It can detect RF and measure electromagnetic radiation from household appliances. It's ideal for ghost hunting enthusiasts, office workers, pregnant women, and the elderly. Use it to test magnetic and electric fields from sources like cell phone towers and low-frequency appliances to limit exposure to potentially harmful radiation.
  • 💚Warm tips:Our product comes with a user manual, charging cable, and portable strap inside the package. If you have any questions or concerns, please contact our customer service team. We will provide professional and thoughtful assistance.
SaleNo. 15
AMTAST TES11A Tesla Tester Digital Gauss Meter Surface Magnetic Field Meters Metal Probe Guassmeter with Ns Function
  • The TES11A Handheld Digital Teslameter is a field-portable unit that measures DC magnetic fields with direct digital readout in mT or Gs.
  • With small volume, light weight and convenient carry, this instrument can meet the measurement requirements of various sites
  • Can select transverse probe or axial probe. Have judgment function of magnetic field polarity. The unit is designed for wide range, auto-range, high accuracy, and ease of use
  • Adopt micro power consumption design. With long service life, the battery can be continuously used for more than 50 hours
  • Wide Application: used for measuring the permanent magnetic material surface magnetic field, dc motors, speaker, magnetic separation machine, permanent magnet in addition to the work of iron and leakage magnetic field etc.
No. 16
MF-30K AC/DC Gauss Meter with Certificate, Measures Magnetic Fields Strength and Pole(Residual Magnet, Permanent). Integrated High AC ElectroMagnetic Fields Level Measurement (
21 Consomer Reviews
MF-30K AC/DC Gauss Meter with Certificate, Measures Magnetic Fields Strength and Pole(Residual Magnet, Permanent). Integrated High AC ElectroMagnetic Fields Level Measurement (<15000G/Milli Tesla)
  • ✔ DC Digital Magnetic gauss meter fields measurement up to 30000 Gauss or 30000mT (mili Tesla). AC Magnetic fields measurement up to 15000 Gauss or (mili Tesla)
  • ✔ Magnetometer and Temperature measurements and display. Useful function to measure magnetism in a specific environment temperature.
  • ✔ Measures and detects the following: AC magnetic levels, industrial strength magnet tester, magnets and magnetic pole detector, DC Magnet, Permanent magnet,
  • ✔ Data recording and USB interface to send data + PC connection application software, real time function. GO and NO-GO alarm and alarm value set up the function, Production testing.
  • ✔ Calibration Certificate included and one year warranty.
SaleNo. 17
AceFox EMF Meter Magnetic Field Detector, EMF Meter Ghost Hunting Equipment Tester, Handheld Portable EMF Meter for Indoor & Outdoor Inspections
  • ⚡[Protect Your Health] The emf meter radiation detector's levels are measured to prevent potentially harmful long-term overexposure to electromagnetic fields. You can use this emf detector meter in your house, office etc.
  • ⚡[Widely Applications] The emf meter ghost hunting helps measure electromagnetic fields to identify devices that produce high levels of radiation and enables users to determine the extent to which to limit exposure. Emf tester meter is mainly used for testing TV, computer, microwave oven, refrigerator, printers, cell towers, low-frequency home appliances, ghost hunting, etc.
  • ⚡[Precise Measurement] The ghost hunting detector operates on a single battery and reports EMF measurements in the range of 5 mGyS.
  • ⚡[Colored LED Indicator] This emf detector ghost hunting has 5 LED indicator which make readings visible in daylight or darkness, easy to carry all the time since it fits in your pocket or purse.
  • ⚡[Larger Frequency Range] This emf reader for radiation measures various electromagnetic fields from 50 Hz to 20,000 Hz, it can register cell phones within 2 feet.
  • ⚡⚡⚡Tips: The battery needs to be replaced when it runs out of power, our ghost meter emf detector are not rechargeable. First, unscrew the plastic cover with a screwdriver. Then remove the battery and finally just put in a new one and tighten it again with a screwdriver.
No. 18
5 LED EMF Meter Magnetic Field Detector Ghost Hunting Paranormal Equipment Tester Counter
  • The range of EMF meters used for ghost hunting helps to measure electromagnetic fields to identify devices that generate high radiation, enabling users to make decisions about limiting exposure.
  • Easy-to-read multi-segment LED display. The detector is associated with the location and it is reported that the unexplained phenomenon is related to radiation.
  • The Ghost Hunting Detector operates on a single battery and reports EMF measurements in the 5 milligauss range.
  • Measuring a variety of EMFs from 50 Hz to 20,000 Hz, it can register mobile phones within 2 feet.
  • EMF levels are measured to prevent potentially harmful long-term overexposure to EMF.
No. 19
Metal Detector FREE - turn your phone into magnetic field meter
  • Metal Detector PRO is an extremely useful application for your android phone
  • Application Metal Detector PRO uses built-in magnetometer that can measure electromagnetic field (EMF) level in your surroundings.
  • This application detects electromagnetic fields there around your smart phone and tells you if there are metal close.
  • Meta Detector app uses built-in magnetic field sensor. Please check in your phone specification if your device is equipped with one.
  • The app detect ferromagnetic metals which means that only detects those which generate magnetic fields.
  • The metal detector app works also through walls so it can detect hidden electrical wires, studs and metals.
  • The magnetic field intensity is presented on a magnetic field intensity chart.
  • The magnetic field meter will play sound and vibrate if magnetic field generation object are detected in proximity of the app.
  • Please note that the accuracy depends entirely on the magnetic sensor (magnetometer) in your device and might be affected by electromagnetic waves generated by nearby electronic equipment.
  • English (Publication Language)
SaleNo. 20
Extech MF100 AC/DC Magnetic Field Meter
  • Utilizes Hall effect sensor with ATC (Automatic Temperature Compensation)
  • N pole/S pole indicator
  • Zero button for DC measurement
  • Data Hold and Min/Max
  • Auto power off with disable

How to choose a good magnetic field meters

Does the idea of finding a fantastic magnetic field meters make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in magnetic field meters. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top magnetic field meters products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top magnetic field meters on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top magnetic field meters brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top magnetic field meters based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the magnetic field meters were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good magnetic field meters, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your magnetic field meters.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting magnetic field meters for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our magnetic field meters. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what magnetic field meters should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on magnetic field meters.