Hirst Magnetics GM07 Gauss Meter, DC and 15 Hz → 10 kHz
9 mT, Minimum Magnetic Measurement: 0 mT, 0 T, Best Accuracy: ±1 %, Operating Units: Amps/m, Gauss, Oersteds, Tesla, Maximum Operating Temperature: +50°C, Battery Type: AA, Dimensions: 175 x 89 x 40mm, Length: 175mm, Weight: 430g.9 mT, 0 → 3 T, Maximum Magnetic Measurement: 2.999 mT, 0 → 29.