PRESSURE SWITCHS

Pressure switch

In the NORMALLY OPEN (NO) version (Fig. 1), the contact is open, i.e. there is no flow of current in the absence of pressure. When the pressure setting is reached, the electrical contact closes.
The picture in Fig. 2 shows a pressure switch with NORMALLY CLOSED (NC) contacts in the absence of pressure. We can see that, in the absence of pressure, contacts are closed and the signal is present on the external contacts. When the pressure setting is reached, the electrical contact rises and interrupts the signal.

25R	25D	26-266
Miniaturized pressure switch	Miniaturized snap-action pressure switch	Fixed Setting Pressure switches

30-30V	31-31V	40-40V
Piston-operated pressure switch ≤ 250V	Diaphragm pressure switch ≤ 250 V	Piston-operated pressure switch ≤ 48V

41-41V	41-41V	41V-42V
Diaphragm pressure switch ≤ 48V	Diaphragm pressure switch ≤ 48V	Diaphragm pressure switch ≤ 48V – with female connecto

681	682
Pressure switch with visual setting scale	Pressure switch with visual setting scale