P-M Series Gauge Pressure Switch
The P-M series of gauge pressure switches are the most popular products in the Precision Sensors product line and are in service across hundreds of applications. The series is composed of the P12M, P18M, P20M, and P56M type switches. The polyimide diaphragm design offers extreme cycle life while maintaining great repeatability and a wide operating temperature range. The negative rate Belleville spring design is well suited for the harsh applications of aerospace vehicles. The hermetically sealed electrical switch is ideal when vapor ignition is a concern.
Common applications include fuel and hydraulic oil pressure, engine bleed air systems, static fan pressure.
For qualification information, please consult the sales or engineering departments.
Features
- Intended for liquid or gaseous media
- Wetted material 300 CRES, aluminum, polyimide, elastomer seal (varies by media)
- Hermetically sealed contacts
- Proven negative rate Belleville spring design for high cycle life and repeatability
Specifications*
| Specification | P12M | P18M | P20M | P56M |
| Available settings | 15 to 2500 psig | 5 to 60 psig | 1.0 to 30.0 psig | 0.25 to 6.0 psig |
| Repeatability | 2.0 psig + 2% of setting | 0.5 psig + 2% of setting | 0.1 psig + 2% of setting | 0.05 psig + 3% of setting |
| Deadband | 2.0 psig + 10% of setting | 1.0 psig + 9% of setting | 0.3 psig + 7% of setting | 0.2 psig + 5% of setting |
| Proof pressure | 4500 psig | 500 psig | 200 psig | 200 psig |
| Operating temperature range | -65 to 250°F | -65 to 250°F | -65 to 250°F (high temperature configurations available) | -65 to 160°F |
| Typical weight | 0.18 lbm standard configuration | 0.23 lbm standard configuration | 0.30 lbm standard configuration | 0.37 lbm standard configuration |
| Electrical rating | 7 Amps max. at 28 VDC | 7 Amps max. at 28 VDC | 7 Amps max. at 28 VDC | 7 Amps max. at 28 VDC |
| Switch configuration | SPST, SPDT, DPST, DPDT | SPST, SPDT, DPST, DPDT | SPST, SPDT, DPST, DPDT | SPST, SPDT, DPST, DPDT |
| Pressure connections |
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| Electrical connections |
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| Warranty | 18 months | |||
* Specifications subject to change
