Simco-Ion’s FMX-004 Electrostatic Fieldmeter is a compact handheld electrostatic fieldmeter used for locating and measuring static charges. Its pocket size makes it handy to use and four-button operation makes it easy to operate. The FMX-004 measures static voltages within ±30 kV (30,000V) at a distance of 1 inch. Results are simultaneously displayed numerically and in bar graph format.