| Type |
B174 |
| Instrument name |
Pressure switch |
| Application |
Disconnecting of electric circuit at exceeding the measured pressure value; it is applied in industrial automation systems and in design of machines and devices (e.g. in pump systems protecting against “dry operation”) |
| Working medium |
Liquid, or gas not reacting chemically with copper alloys |
| Supply pressure |
max. 1 MPa |
| Contact load-carrying capacity |
250 V, 50 Hz; 2.5 A
or 380 V, 50 Hz; 6 A |
| Accuracy of switching pressure settings |
0.8 kPa or 1 kPa
/depending on the version/ |
| Hysteresis |
8 ... 14 kPa or 8 ... 28 kPa
/depending on the version/ |
| Range of switching pressure settings |
10 ... 30 kPa or 32 ... 40 kPa
/depending on the version/ |
| Operating temperature |
-25°C ... +70°C
/measured medium temp.
-25°C ... +120°C/ |
| Process connector |
stub pipe with thread G1/4” or R1/4”
/depending on the version/ |
| Material of part contacting the medium |
Body – nickel-plated brass;
bellows – bronze |
| Material |
Casing and cover – nickel-plated brass |