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OEM Mechanical Pressure Switch with High Purity

0.8 to 30 psi, fixed deadband


Item# PSW-691-N1

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-24 C$255.45
25-49 C$242.68
50-99 C$237.57
100-199 C$227.35
200+ C$222.24

In stock

Lead Time (If not in stock): 3 weeks
0.8 to 30 psi, fixed deadband PSW-691-N1 PSW-691-N1
  • All Stainless Steel Wetted Parts
  • Sensing Element Capsule, Electron Beam Welded
  • Helium Leak Tested 4 x 10-9 STD CC/sec
  • External Pressure Scale and Pointer For Easy Set Point Adjustment

PSW-691-N1 Model Options

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Switch Type
Pressure Range
Pressure Type
Pressure Port Size
Pressure Port Type

Process Temp: -54 to 107°C (-65 to 225°F); setpoint change of up to 2% of sensor capacity may be anticipated when switch is used either below -23°C or above 51°C
Cycling: Not to exceed 20 cycles/min, 1 million cycles
Proof Pressure: 150% max pressure
Wetted Parts: 17-7 PH electron beam welded, 303 SS fitting
Enclosure: 303 Stainless Steel body, zinc alloy with chromate finish locking ring and switch housing, valox cap
Dimensions: 51 L x 29 mm Dia (2 x 1.125') with NPT fitting; 60 L x 29 mm Dia (2.375 x 1.125') with VCR fitting
Weight: Approx. 85g (3 oz)
Pressure Port: 1/8-27 MNPT or 1/4 VCR
Electrical: 300 mm (12') pigtail leads, 20 AWG, polyvinyl insulated
Wiring Code:
   Pressure Switch: Black = Common, Red = N/C, White = N/O
   Vacuum Switch: Black = Common, Red = N/O, White = N/C
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Rated 5 out of 5 by from High quality and dependable High quality and dependable solutions for my completion center. Never had to replace one.
Date published: 2023-10-30
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Can this unit be used with Oxygen? If not does omega offer one for use with oxygen?

Asked by: JABM
The wetted parts of this switch are all stainless steel so they can be used for oxygen once they have been cleaned for oxygen service. We do not offer oxygen cleaning. You would be required to have these cleaned by an independent service.
Answered by: Applicatrions Engineer JK
Date published: 2023-11-29
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