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Description

Hydraulic pressure switch is a form of switch that closes an electrical contact when a certain set pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall.

Usage

Hydraulic pressure switches have various uses in automobiles:
1. To switch on a warning light if the engine´s oil pressure falls below a safe level
2. In dust control systems (bag filter), a pressure switch is mounted on the header which will raise an alarm when air pressure in the header is less than necessary to gain or decline energy beyond the set value
3. To control automatic transmission , torque converter, lock-up