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Vacuum Switches pS81 Series Pressure (cod: #272)
Vacuum Switches pS81 Series Pressure
Specifications 

Wetted Parts 

Diaphragm:Nitrile Standard (optional EPDM, Kapton® or Viton®) 
Fitting: Brass 
Housing: Brass 
O-Ring: Nitrile (optional Viton® or EPDM)
Spring: 300 Series Stainless Steel 
Spring Guide: Delrin 

Operating Temperature* 

Nitrile: 15°F to 250°F (-10°C to 121°C)
Viton®: 0°F to 250°F (-18°C to 121°C)
EPDM: -40°F to 250°F (-40°C to 121°C)
Kapton®: -40°F to 250°F (-40°C to 121°C)
 

Switch** 

5A @ 125/250 VAC,
3 Amp inductive @ 24 VDC (Std)

Electrical Termination  

DIN 43650A IP00; Terminals IP00; Flying Leads IP00; IP Option IP00 

Proof Pressure 

0 psia to 150 psig (-1 Bar to 10.3 Bar)

Burst Pressure 500 psi (34.5 bar)

Approvals 

CE, UL Approved units available, consult factory 

Weight, Approximate 

0.31 lbs. (0.14 kg) 

* Switches may function below the cold temperature limit but the setpoints and deadband will increase. Consult factory for details.
**Gold contacts (Option G) may be required for less than 12 VDC or 20 mA. 

 

Repeatability / Deadband

 Pressure Range Code

Pressure Range 

Repeatability

Average Deadband*

10

1.5 - 5" Hg (51 - 169 mbar)

± 0.2" Hg (7 mbar) + 3% of setting

0.3" Hg (10 mbar) + 9% of setting

 20

4 - 15" Hg (136 - 508 mbar)

 ± 0.35" Hg (12 mbar) + 4% of setting

0.6" Hg (20 mbar) + 11% of setting

* In certain applications, deadband can be tailored and controlled to customer specifications. Consult factory for details.

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