The parameters of this pressure switch are 90psi ON and 120psi OFF，This group of parameters is relatively common and is often used in ABR air pump ,car air conditioners, car horns, air pumps, and air compressors.Its working principle is very simple, it is used to detect the pressure of the gas or liquid in your equipment, and when the pressure reaches the set parameter, it will make the switch on and off.
For example, this is a normally closed pressure switch，When you just start the device, the switch is already in the on state. When the pressure rises to 120psi, the switch will be power off .At the same time, your equipment will also be in a shutdown state。At this time, the pressure will drop. When the pressure drops to 90psi, the pressure switch is turned on and the equipment is started.The pressure of the equipment will always be between 90-120psi to ensure the normal operation of the equipment，You can ask us to set any parameter value suitable for the operation of your equipment.
Generally speaking, the commonly used threads of this switch are 1/4, 1/8, 3/8，The threaded part can also be made into a pagoda head, which is directly connected to your water pipe and air pipe，The insert part can be welded to the wire and a waterproof cover is added。
If you have other questions about this pressure switch, Or if you need other parameters such as 70-100、80-110 and so on,Please contact us