8103 Gauss Meter, Rechargeable Tesla Meter 0-2500mT, Magnetometer with Data Logging and Alarm, Magnetic Field Strength and Pole Tester, ±2% Industrial Accuracy for Quality Control, Labs

AEGTEST AEG-8103 Gauss Meter, Rechargeable Tesla Meter 0-2500mT, Magnetometer with Data Logging and Alarm, Magnetic Field Strength and Pole Tester, ±2% Industrial Accuracy for Quality Control, Labs

Magnetic Field Viewing Film 4"x4", Magnetic Flux Display, Magnet Pattern Detector, Scientific Project Teaching, Reusable and Automatic Recovery - Olive

CMS Magnetics - Magnetic Pole Detector, a Handy Polarity Identifier to Determine Magnet's North or South Poles, Great for School Teachers, Science Projects, and Metal Detector