Danfoss Pressure controller (KP series)

Pressure controls are pressure-activated switches, with a basic function to make or break an electrical circuit which in tur controls a solenoid coil, a contactor or some other functioning part of the system. The set point at which a control closes a contact and makes a circuit is called the cut-in point. The point at which the control opens the switch and breaks the circuit is called the cut-out point. The difference between the cut-in and cut-out point is known as the differential.