DIETZ 171D / 170D Technical Specifications (526KB PDF)
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The Dietz Model 170D Ultra Low Differential Pressure Switch combines extremely low pressure actuation, maximum electrical ratings and rugged construction to withstand unusually harsh environments. The 171D is shock and vibration resistant, due to a minimum number of moving parts and the absence of lever amplifiers, and will actuate at 1" H2O under extreme shock and vibration conditions. Overpressure of 25 lbs per square inch will not damage the switch or change calibration settings. Diaphragm movement is limited to provide an extremely long diaphragm life.
This rugged but simple design makes the Dietz 170D ideal for use on locomotives, ships, construction equipment, and variety of outdoor applications. A highly resistant epoxy finish for use where corrosive fumes or acids are present, such as in chemical plants, plating rooms, and sewage plants.
Model Number |
Part Number |
Operating Range |
Switch Current |
170D8W-S |
D21530 |
1.0–8.0" H20 |
10 Amp 125 VAC |
170D8W |
D21531 |
2.0–8.0" H20 |
15 Amp 125 VAC |
170D20W |
D21532 |
2.0–20" H20 |
15 Amp 125 VAC |
170D40W |
D21533 |
2.0–40" H20 |
15 Amp 125 VAC |
171D8WC-S |
D21540 |
0.05–8.0" H20 |
10 Amp 125 VAC |
171D8WC |
D21541 |
0.15–8.0" H20 |
15 Amp 125 VAC |
170D8W-S-DC |
D21564 |
1.0–8.0" H20 |
0.75 Amp 75 VDC |
170D8W-DC |
D21536 |
2.0–8.0" H20 |
0.75 Amp 75 VDC |
170D20W-DC |
D21537 |
2.0–20" H20 |
0.75 Amp 75 VDC |
170D40W-DC |
D21538 |
2.0–40" H20 |
0.75 Amp 75 VDC |
171D8WC-DC |
D21542 |
0.15–8.0" H20 |
0.75 Amp 75 VDC |