The SMC pressure switch amplifies the pressure signal through a high-precision instrument amplifier, collects and processes data via a high-speed MCU, and has an internal temperature sensor for temperature compensation. It is a high-precision device for detecting pressure and liquid level signals, and for monitoring and controlling pressure and liquid level. It is widely used in the automation systems of chemical, mechanical, hydrological, power, environmental protection and other industries for measuring the pressure of gases and liquids. Due to its convenient and flexible adjustment, simple installation, it can replace most of the occasions where liquid level switches are used.