The Triplett SFM500 Static Field Meter is used for the non-contact measurement of an electrostatic charge on a body or object. This unit has a range of -19.000kV to +19.000kV and a 1 in. measuring distance. Measurements are read on the 4.5 digit (19,999 count) backlit LCD display. The Triplett SFM500 also features user programmable audible high/low alarm settings, data hold function that freezes the reading on the display, min/max captures the highest and lowest readings, and a zero function that clears residual readings on the display and resets it to zero. Users can manually store/recall 99 readings with this tool. In addition, this unit includes a low battery indicator, auto power off (with disable) to conserve battery life, and a tripod mount for hands-free operation.