1. Measure the surface potential of insulators, semiconductors, or conductors,

2. Continuous online measurement of electrostatic voltage on oil surface (National Standard GB6951)

3. Research on Electrostatic Charging and Surface Potential of Optoelectronics, Photocopying, and Electrets

4. Integrated Circuit IC Manufacturing and Processing, Electrostatic Process Monitoring and Control

5. Real time monitoring of oil surface potential

6. Monitoring of Static Electricity Field in Atmospheric Clouds

Traditional non-contact electrostatic testers include electrode type, vibrating capacitor type, field grinding type, etc. Among them, the electrode type electrostatic meter directly amplifies and AD samples the charge signal on a single induction electrode through the circuit. Due to the easy attenuation of the charge signal in the circuit, the zero drift of the electrostatic meter is large and needs to be adjusted frequently, which is inconvenient to use. Vibration capacitance and field grinding electrostatic meters modulate the induced charge on the induction electrode through vibration or rotation, measure the electric field strength near the charged body, invert the electrostatic voltage of the charged body, and avoid the attenuation of induced charge. However, these electrostatic testers generally expose the sensitive chips of the sensors, and these exposed movable units are prone to damage in harsh environments such as dust. They are also prone to generating electric sparks due to their own friction or collision with the outside world, causing safety hazards. Static electricity hazard is a major safety hazard in technology and production activities. After contact and separation between different substances, static electricity can be generated. Due to its simple and difficult to detect nature, even a slight mistake can lead to a major accident. According to statistics, the electronic industry in the United States suffers losses of up to $10 billion annually due to static electricity hazards, while electronic products in the United Kingdom suffer losses of £ 2 billion annually due to static electricity. In Japan, no less than 45% of non-conforming electronic components are caused by electrostatic discharge (ESD) hazards. Electrostatic discharge may ignite certain flammable objects and cause explosions. For example, in the field of petroleum and petrochemicals, static electricity carried by the human body or equipment can easily ignite the gases emitted by oil products. Friction between oil products and powders and surrounding containers during storage and transportation can also generate a large amount of static electricity. In the field of industrial production, flammable and explosive gases such as hydrogen, acetylene, and gas, as well as dust such as coal powder, aluminum powder, and flour, may all cause explosions due to electrostatic sparks. In the field of electronics industry, the breakdown voltage of MOS circuits and field-effect transistors is generally about 300V. However, during the dry season, human static electricity can reach tens of thousands of volts, which can easily damage or even damage semiconductor devices, leading to equipment failures.