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PS Series Pressure Switches, Up To 4000 PSI

Description & Features

Electrical Ratings	4 Amps at 250VAC. 3 Amps at 12VDC.
Features	As many as three switching elements can be independently adjusted over the full pressure range. A single pressure tap (1/8 Female NPT) serves all piston mounted microswitches. Viton seal with Teflon® back-up ring. Oil Tight NEMA 12 case. Standard 1/2 inch conduit connection.
Identification	Switch 1: White = Common, Red = NO, Black = NC. Switch 2: White w/ One Yellow Stripe = Common, Red w/ One Yellow Stripe = NO, Black w/ One Yellow Stripe = NC. Switch 3: White w/ Two Yellow Stripes = Common, Red w/ Two Yellow Stripes = NO, Black w/ Two Yellow Stripes = NC.
Pressure Rating	Rated Pressure 4000 PSI. Burst Pressure 12,000 PSI.
Repeatability	2% of set pressure.
Temperature Range	-20°F to 160°F.

Products

Model Number	Includes	Adjustable Range	Fixed Reset Pressure Differential (psi)	Price	Action
PS-400-115 PS Series Pressure Switch	Single Switch	300-2600	Apprx. 300 PSI @ 1125 Setting

Product Questions & Answers (1)

Question by: Brett H on Mar 28, 2026, 8:06 AM

What's the deal with the wiring on these? Need to make sure I get it right the first time.

Answer by: Customer Support on Mar 30, 2026, 6:18 AM

Switch one uses White for Common, Red for Normally Open (NO), and Black for Normally Closed (NC). For switch two, it's White with one yellow stripe for Common, Red with one yellow stripe for NO, and Black with one yellow stripe for NC. Switch three uses White with two yellow stripes for Common, Red with two yellow stripes for NO, and Black with two yellow stripes for NC.