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
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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
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Operating Temperature*
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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)
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Switch**
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5A @ 125/250 VAC,
3 Amp inductive @ 24 VDC (Std)
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Electrical Termination
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DIN 43650A IP00; Terminals IP00; Flying Leads IP00; IP Option IP00
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Proof Pressure
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0 psia to 150 psig (-1 Bar to 10.3 Bar)
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Burst Pressure |
500 psi (34.5 bar) |
Approvals
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CE, UL Approved units available, consult factory
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Weight, Approximate
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0.31 lbs. (0.14 kg)
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* 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
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Pressure Range
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Repeatability
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Average Deadband*
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10
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1.5 - 5" Hg (51 - 169 mbar)
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± 0.2" Hg (7 mbar) + 3% of setting
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0.3" Hg (10 mbar) + 9% of setting
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20
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4 - 15" Hg (136 - 508 mbar)
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± 0.35" Hg (12 mbar) + 4% of setting
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0.6" Hg (20 mbar) + 11% of setting
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* In certain applications, deadband can be tailored and controlled to customer specifications. Consult factory for details.
Dimensions:
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A |
Adjustment Screw Under Cap |
B |
Red = N.O., Green = N.C., Black = Common |
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A |
2.150" (55) |
B |
1.86" (47) |
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A |
1.10" (28) |
B |
DIN 43650A |
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