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Pressure Switch pS81 Series Gems Sensors

Gems Sensors Pressure Switch

For low vacuum applications, the longevity of our PS81 Series is hard to beat. A life expectancy of 1 million cycles means long-term reliability. Their brass housing and choice of four diaphragm materials ensures chemical compatibility with your system.
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-1
Code
pS81 Series

Gems Sensors Pressure Switch

 Ultra-Long Life Vacuum Switches

Quick Specs... 

  • 1.5" to 15" Hg (51 to 508 mbar) 
  • Sensitive Diaphragm for lower set points 
  • Factory Fixed or Adjustable Set Points  

Overview / Design Principle: 

For low vacuum applications, the longevity of our PS81 Series is hard to beat. A life expectancy of 1 million cycles means long-term reliability. Their brass housing and choice of four diaphragm materials ensures chemical compatibility with your system. PS81 Series switches have a field adjustable set point or can be factory set.

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.

Dimensions:

 Flying Leads
 DimPS81a.gif 
A  Adjustment Screw Under Cap 
B  Red = N.O., Green = N.C., Black = Common 
 
 DimPS81b.gif 
A  2.150" (55) 
B  1.86" (47) 
 DIN 43650A - with Cable Clamp
 DimPS81c.gif 
A  1.10" (28) 
B  DIN 43650A 
 DIN 43650A - Male Half Only
 DimPS81d.gif 
A  2.34" (59) 

Product Documentation

PS81 Series
PS81 Series - Download PDF
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