Extech 480823 Electromagnetic Field and Extremely Low Frequency Meter
The Extech electromagnetic field and extremely low frequency meter has a large 1/2-inch LCD 3-1/2 digit display of electromagnetic field (EMF) level in milligauss or microtesla. It also comes with over range indication, and a sampling time of 2.5-times per second. The meter is 5.2x2.8x1-inches and comes complete with a 9-volt battery.