The vacuum pressure switch is a purely mechanical deformation that causes the micro switch to act. When the pressure increases, the vacuum switch acts on different sensing pressure components (diaphragms, bellows, pistons) to generate deformation, and will move upward, through the mechanical structure such as the railing spring, and finally activate 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. The vacuum pressure switch has a variety of options for different ranges of absolute negative pressure and positive and negative pressure. While measuring negative pressure, the vacuum switch can withstand a certain strength of positive pressure, and has a very wide range of applications in the power industry.

When the vacuum pressure in the system is higher or lower than the set pressure, the pressure sensor in the controller will act immediately, so that the switch contacts in the controller will be disconnected or connected.
At this point, the equipment stops working; the manufacturer of vacuum pressure switch tells you that when the vacuum pressure in the system returns to the pressure range set by the equipment, the pressure of the controller is reset immediately, so that the switch contacts in the controller are turned on or off. device works normally.
This is the role of the vacuum pressure switch, I believe that through our introduction, you have already understood.