SIMCO fmx-003 filed meter is a compact electrostatic field meter 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-003 measures static voltages within 22kv(positive/negative) at a distance of 25mm. Results are simultaneously displayed numerically and in bar graph format. Power on/off.zero adjustment,lon balance(IB) and HOLD are all push button operation.The hold button allows the display to retain the static charge reading. This is especially useful where display to retain the static charge reading. This is especially useful where display is difficult to see during measurement. Two led guide lights help positionnthe field meter at the right distance from a charged test object. The circuitry of the FMX-003 has been designed to make measurements in areas using air ionization.