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OEM Mechanical Pressure Switch for Harsh Environments

360 to 1,700 psi, fixed deadband


Item# PSW-809

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 $106.45
10-24 $101.13
25-49 $99.00
50-99 $94.74
100-199 $92.61
200+ $90.48

In stock

Lead Time ( If not in Stock): 5 weeks

360 to 1,700 psi, fixed deadband PSW-809 PSW-809
  • UL and CSA Marked
  • Easy Adjustment with Locking Set Screw
  • Rugged Industrial Design
  • Standard 1 /2 " Female Conduit Fitting for Electrical Termination

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

Product Specs

  • Contact Blocks 5 A maximum @ 125/250 Vac
  • Maximum Ambient Temperature 75 {C} (167 {F})
  • Maximum Rating 5 A maximum @ 125/250 Vac
  • Minimum Ambient Temperature -20 {C} (-4 {F})
  • Pressure Type Economical Industrial Pressure Switches for Vacuum to 7500 psi
  • Pressure Units PSIG
  • repeatability +/-1% of Span
  • Sensor Type diaphragm piston

The PSW-800 Series are economical pressure switches which feature an easy-to-adjust setpoint with locking set screw. They utilize a sealed piston or diaphragm-piston design, which is ideally suited for harsh environments. All models come with 300 mm (12') color-coded leads and a ½' female conduit fitting for electrical connections.

Setpoint Repeatability:
   Diaphragm Models (PSW-801 to PSW-807): ±1% of span
   Piston Models (PSW-808 to PSW-811): ±1.5% of span
Contact Rating: 5 amp max @ 125/250 Vac, silver serrated contacts 3 amps max @ 28 Vdc
Temp. Range:
   Vacuum Range: -20 to 75°C (-4 to 167°F)
   ≤500 psi: -30 to 75°C (-22 to 167°F)
   ≥600 psi: -40 to 75°C (-40 to 167°F)
Thermal Effects: <1% for 25°C (45°F) change
Burst Pressure: 2x proof pressure
Sensor Type:
   PSW-801 to PSW-807: diaphragm piston
   PSW-808 to PSW-811: sealed piston
Wetted Parts:
   ≤500 psi: brass, Buna-N
   ≥600 psi: brass, Buna-N and stainless steel
Pressure Port: ¼ NPT male
Electrical Connection: 300 mm (12') free leads with ½' female conduit fitting
UL Marked: Number: E105651
CSA Marked: File: 216524
Housing: Open type plastic housing
Weight: 0.4 kg (0.95 lb)

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What is the thread size? I am looking to purchase the appropriate tap to thread this pressure switch into a schedule 40 pipe. Usually it&rsquo;s pre threaded but this one was not. &nbsp;

Asked by: Tom G
The process connection thread on all ranges of the PSW-800 Series pressure switches is a 1/4-18 NPT male thread
Answered by: Application Engineer JK
Date published: 2020-12-03

Are these switches compatible with DOT 3 brake fluid?

Asked by: Racer
No they are not. The Buna-N material in the switches wetted parts will be attacked by the brake fluid
Answered by: Application Engineer JK
Date published: 2020-08-25
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