Magnetic Field Detector
The Triplett EMF20 Magnetic Field Meter measures electro-magnetic field of extremely low frequency (ELF) from 30 to 300Hz produced from electric transmission equipment, power lines, microwave ovens, air conditioners, refrigerators, computer monitors, fans, hairdryers, and many other appliances. Measurements can be displayed in milligauss or µTesla. It features a single axis sensor, ±2.5% accuracy, and a Max Hold function. Includes 9V battery and carrying case. 1 year warranty.