D-S Series Differential Pressure Switch
The D-S series contains the most sensitive differential pressure switches in the Precision Sensors product line. The “slack” diaphragm technology provides repeatable and precise differential pressure measurement by maintaining a calibrated force balance between “high” and “low” inlet pressures. The silicon diaphragm allows superior performance across a wide range of operating temperature while maintaining high cycle life.
Typical uses include delta-P applications, airflow filter systems, airborne wave guide systems.
For a differential switch capable of wet media with a higher resistance to vibration, refer to the D16M. For qualification information, please consult the sales or engineering departments.
Features
- Intended for gaseous media
- Environmentally sealed
- Robust slack diaphragm for increased pressure rating and cycle life
- Optional hermetically sealed contacts when vapor ignition is a concern
Specifications *
| Specification |
DA79S |
DA128S |
|---|---|---|
| Available settings | 2.0 to 30.0 inH2O | 1.5 to 5.0 inH2O |
| Repeatability | 1.25 inH2O + 5% of setting | 0.1 inH2O + 5% of setting |
| Deadband | 0.4 inH2O + 3% of setting | 0.2 inH2O + 5% of setting |
| Case proof pressure | 10 psig | 5 psig |
| Differential proof pressure | 10 psid | 1 psid |
| Operating temperature range | -65°F to 160°F (optional -100°F to 250°F configuration) | -65°F to 160°F (optional -100°F to 250°F configuration) |
| Typical weight | 0.45 lbm standard configuration | 1.5 lbm standard configuration |
| Electrical rating | 7 Amps max. at 28 VDC | 7 Amps max. at 28 VDC |
| Switch configuration | SPST, SPDT | SPST, SPDT |
| Pressure connections |
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| Electrical connections |
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| Warranty | 18 Months | 18 Months |
* Specifications subject to change
