What are the advantages of capacitive sensors?

　　1. Good temperature stability

　　The capacitance value of the capacitive sensor is generally independent of the electrode material, which is conducive to choosing materials with low temperature coefficient, and because of its very small heat generation, it has little effect on stability. The resistance sensor has copper loss and is easy to generate zero drift due to heat generation.

　　2. Simple structure

　　The inductive sensor has a simple structure, is easy to manufacture and guarantees high accuracy. It can be made very small to achieve some special measurements; it can work in harsh environments such as high temperature, strong radiation and strong magnetic fields, and can withstand large temperatures. Change, withstand high pressure, high impact, overload, etc.; can measure ultra-high temperature and low pressure drop, and can also measure the work with magnet.

　　3, good dynamic response

　　Inductive sensors, because the electrostatic attraction between the plates with electrodes is very small (about a few 10^(-5)N), the required energy is very small, and because its movable part can be made very small and thin, that is, the mass It is very light, so its natural frequency is very high, the dynamic response time is short, and it can work at a frequency of several MHz, which is especially suitable for dynamic measurement. And because of its low dielectric loss, it can be powered by a higher frequency, so the system has a high operating frequency. It can be used to measure high-speed changing parameters.

　　4, non-contact measurement and high sensitivity

　　Non-contact measurement of the vibration or eccentricity of the rotating shaft, the radial clearance of small ball bearings, etc. When using non-contact measurement, the capacitive sensor has an averaging effect, which can reduce the influence of the surface roughness of the workpiece on the measurement.

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