This project is easy to use. place the card on the of a magnetic material and it will display a patterned magnetic field. Great for personal or scientific research. It can help us study magnetic fields that we cannot see.
eBay
Handheld EMF Meter Digital Electromagnetic Radiation Tester 0-20+milliGauss Magnetic Field EMF Detector for Microwave Hair Dryer
Aliexpress UK
It is used to test and learn electromagnetic radiation situation indoor and outdoor. 1 Electromagnetic Radiation Detector. Alarm Threshold: 40mG, 0.4μT. Unit: mG / μT (Magnetic Field). Resolution: 1mG, 0.1μT.
eBay
FNIRSI ERD-10 4-IN-1 Electromagnetic Radiation Detector Electric & Magnetic Field Strength RF Power Temperature Monitor
Aliexpress UK
Item Type: Digital Magnetic Field Detector. Display backlight, 5 minutes automatic shutdown function. Support a variety of hall probes to be replaced, easy to use. Range: 200mT (2000Gs); 2500mT (25000Gs).
eBay
FNIRSI ERD-10 4-IN-1 Electromagnetic Radiation Detector, Electric & Magnetic Field Strength, RF Power, Temperature Monitor
Aliexpress UK
Light weight, low power consumption.
eBay
FNIRSI ERD-10 4-IN-1 Electromagnetic Radiation Detector, Electric & Magnetic Field Strength, RF Power, Temperature Monitor
Aliexpress UK
Special function 5-LED indicator light represents different radiation values. Application of 50/60Hz frequency monitoring, dark green 0 to 1.5 mgauss; green light 1.5 to 2.5 mgauss; yellow 2.5 to 10 mgauss; orange 10 to 20 mgauss; red 20 + mgauss.
eBay
Electromagnetic Radiation Tester Portable Digital LCD Electric Magnetic Field EMF Meter Dosimeter Detector Computer Phone
Aliexpress UK
The 1st Light detects a Normal EMF field, what is always around us.The range is between 0 to 1.5 mG. The 2nd Light (GREEN) detects a Low Level EMF,which range is between 1.5 to 2.5 mG. The 3rd Light (YELLOW) detects a Mid Level EMF in the range between 2.5 to 10 mG.
eBay
FNIRSI GC-03 3-IN-1 Electromagnetic Radiation Detector, Electric & Magnetic Field Strength, RF Power, Temperature Monitor
Aliexpress UK
The first light detects a normal EMF field, which is always around us. Ranges from 0 to 1.5 mG. 2nd Light (GREEN) detects a low level EMF, which ranges from 1.5 to 2.5 mG. 4th light (ORANGE) detects high level EMF field in the range of 10 to 20 mG.
eBay
FNIRSI GC-03 3-IN-1 Electromagnetic Radiation Detector Electric & Magnetic Field Strength RF Power Temperature Monitor
Aliexpress UK
>1 x EMF Magnetic Field Detector (Battery is not included). The 1st Light detects a Normal EMF field, what is always around us.The range is between 0 to 1.5 mG. The 4th Light (ORANGE) detects a High Level EMF field in the range between 10 to 20 mG.
eBay
ET01 Electromagnetic Radiation Detector Electric/Magnetic Field EMF Meter Household Electromagnetic Wave Radiation Measure Meter
Aliexpress UK