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Economical OEM Mechanical Pressure Switch

-28 to -6 inHg, fixed deadband
  • RoHS Icon
  • CE Approved
  • UKCA
  • UL cULus Listed


Item# PSW-581

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-24 C$105.98
25-49 C$100.68
50-99 C$98.56
100-199 C$94.32
200+ C$92.20

In stock

Lead Time (If not in stock): 5 weeks
-28 to -6 inHg, fixed deadband PSW-581 PSW-581
  • External Scale for Easy Set Point Adjustments
  • UL Rated Heavy Duty 15 AMP SPDT Switch Standard

PSW-581 Model Options

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

Switch:15 Amp SPDT silver contacts
Approvals: UL
Process Temp.: -35 to 85°C (-31 to 185°F) 2% set point shift can occur below -23°C (-10°F) or above 52°C (125°F)
Proof Pressure: 600 psig
Cycling: Not to exceed 60 cycles/min
Warranty: 3 years/1 million cycles
Sensor: Aluminum diaphragm
Wetted Parts: Buna-N, aluminum, zinc alloy chromate finish, and loctite sealing compound #271
Enclosure: Switch actuator and bracket steel: irridite finish; adjusting cap and body: zinc alloy chromate finish; switch shield: mylar
Pressure Port: ¼ NPT male
Electrical Conn.: Screw terminals
Size: 92 H x 60 W x 41 mm dia. (3-5/8 H x 2-3/8 W x 1-5/8' Dia.)
Weight: 210 g (7.4 oz)
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Rated 4 out of 5 by from Great Feature We buy this switch from time to time to use in poultry barn applications. Our service tech uses them in the water systems, and likes the adjustable feature on them.
Date published: 2016-10-20
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What voltage is it rated for?

Asked by: clubbrug
Ratings are 15A @ 250VAC max and 9A @ 30VDC max
Answered by: Applications Engineer JK
Date published: 2023-06-01

Can this switch be used with Propylene Glycol and water mixtures ?

Asked by: Kevin K
Thank you for your inquiry, the PSW-582 has Aluminum diaphragm & Wetted Parts: Buna-N, aluminum, zinc alloy chromate finish, and loctite sealing compound #271. You would need to consult with Propylene Glycol manufacturer to ensure the compatibility.
Answered by: rkent
Date published: 2021-12-02
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