【Static Meter】The electrostatic field tester is a non-contact portable electrostatic field tester, which can measure the surface electrostatic value of objects and the ion balance of electrostatic eliminating equipment 【Accurate Test】Measurable range is 0 ~20KV (working distance is 1 inch), equipped with two LED lights to ensure that the measurement is kept 25mm away from the measured object 【LCD Digital Display】Red LCD for positive charge, blue LCD for negative charge, 5 times/s LCD display renewal rate, easier to observe and record values 【Simple Operation】The electrostatic value can be obtained by pointing the electrometer towards the measuring object until the projection of two red led lamps overlap ( the standard distance is about 25mm) 【Accurate Results】The shell of the electrostatic field meter is made of anti-static material with conductivity, and the built-in grounding clip ensures reliable measurement results