Negative pressure switch, also known as vacuum pressure switch, is an intelligent instrument integrating negative pressure measurement, display and control. It has the characteristics of simple operation, convenient installation, high precision and strong function. The vacuum pressure switch has the functions of reverse control, delay control, leakage pressure protection, password protection, one-key error clearing, and multiple pressure switching.

Vacuum pressure switch is a pressure protection automatic controller for vacuum system. 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. When the pressure in the system is higher or lower than the safe pressure, the pressure sensor in the controller will act immediately to make the contacts in the controller connected or disconnected, and the equipment will stop working at this time; when the pressure in the system returns to When the safe pressure range of the equipment is reached, the pressure sensor in the controller is reset immediately, so that the contacts in the controller are turned on or off, and the equipment works normally at this time.
The mechanical pressure switch is a purely mechanical deformation that causes the micro switch to act. When the pressure increases, the vacuum pressure switch acts on different sensing pressure components (diaphragms, bellows, pistons) to produce deformation, and will move upwards, through mechanical structures such as railing springs, and finally start the uppermost micro switch to make the electrical signal output. The mechanical pressure switch setting method is a continuous displacement type from the functional principle, and the set point can be set at a single point and can reach up to 3 different set points.