- 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.
Miniaturized pressure switch
|Miniaturized snap-action pressure switch||Fixed Setting Pressure switches|
|Piston-operated pressure switch ≤ 250V||Diaphragm pressure switch ≤ 250 V||Piston-operated pressure switch ≤ 48V|
|Diaphragm pressure switch ≤ 48V||Diaphragm pressure switch ≤ 48V||Diaphragm pressure switch ≤ 48V – with female connecto|
|Pressure switch with visual setting scale||Pressure switch with visual setting scale|