Portable static meter: The electrostatic field meter features a shell made of conductive anti-static material and includes a built-in grounding clip for reliable measurements. Connect the provided ground wire for accurate results. Digital display: The red LCD indicates positive charge while the blue LCD displays negative charge. With an update rate of 5 times per second, values are easy to observe and record. Accurate test: The measurement range is 0 to 20KV, with a working distance of 1 inch. An LED light is included to ensure the distance from the object being measured is 25mm. Easy operation: Aim the electrometer at the object until the projections of the two red LED lights overlap (standard distance of about 25mm) to obtain the static value, facilitating easy observation and recording. The balance board can be removed to switch between measurement modes. Widely used in: Suitable for industrial production, laboratory research, safety testing, electronic manufacturing, and the textile industry.