The EFM51 is a full-featured hand-held field meter used to perform static surveys and evaluate charge accumulation in electronic manufacturing and in industrial operations. The EFM51 measures static voltages within ±20kV (20,000V) with a microcontroller that calculates the field strength (V/m) with a pre-selected distance (1cm, 5cm, 10cm and 20cm). Results are displayed via a 12 digit alphanumeric LCD screen. Two LED guide ring lights help position the field meter at the right distance from a charged test object.