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OEM Mechanical Pressure Switch for Harsh Environments

8.5 to 50 psi, fixed deadband


Item# PSW-804

 This item is available for quick shipping
Volume discounts available
Volume Discount Schedule
Quantity Price each
1-9 C$157.00
10-24 C$149.15
25-49 C$146.01
50-99 C$139.73
100-199 C$136.59
200+ C$133.45

In stock

Lead Time ( If not in Stock): 3 weeks

8.5 to 50 psi, fixed deadband PSW-804 PSW-804
  • 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

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: Applications 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: Applications Engineer JK
Date published: 2020-08-25
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