The vacuum switch is an automatic measurement and control system for pressure. It uses the principle of a pressure sensor and is designed with a built-in high-precision sensor to prevent the pressure in the system from being too high or too low and output a switching signal to ensure that the equipment operates accurately and stably without supervision. controller. The vacuum switch is a pressure protection automatic controller for vacuum systems. When the vacuum pressure in the system is greater than the set point, the controller will automatically cut off the circuit and send a signal to ensure the normal operation of the system.