The Trek Model 325 electrostatic voltmeter is a versatile insurument used for performing noncontacting electrostatic voltage measurements in applications which include contact potential determination, materials evaluation and electret studies. The Model 325 was specifically designed for high sensitivity applications to allow highly accurate, low noise, noncontacting measurement of electrostatic voltages of 0-±40V over a wide range of proble-to-surface distances.Measurement。
Range:±40V
Sensitivity：1mv
Measurement Accuracy: better than 0.05% of full scale
