P760 pressure controller is a pressure equipment which is specially designed for refrigeration or other mechanical system with negative pressure vacuum degree control. Which can prevent the air leak into the system due to low vacuum from breakdown. It is an automatic controller, which works when receives the pressure signal. In refrigeration equipment, when the pressure of  compressor is lower than the setting pressure, the pressure controller will send electricity signal to cut off the circuit to stop the compressor, so as to protect the system.