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Steel conduit-box pressure switch with adjustment dial and mounting screws

Tjernlund Products, Inc.

Tjernlund Products PS2501 Adjustable Pressure Sensing Switch hvac control

SKU CH-WC9X-T26CW

Adjustable pressure sensing switch for HVAC differential detection up to 12 in wc with SPDT contacts rated 15 A at 277 V AC

  • ColorSteel
  • Adjustable pressure range up to 12 in wc for precise differential detection
  • 15 A non-inductive rating at 277 V AC handles heavy control loads
  • Steel conduit-box housing withstands 190 °F maximum operating temperature
  • SPDT hardwired contacts suit positive pressure and air compressor applications
  • Includes mounting screws for quick installation on 115 V AC systems

HVAC Pressure Sensing Switch PS2501

The Tjernlund Products PS2501 is an adjustable differential pressure switch designed for HVAC control applications. It monitors air pressure in ductwork, air compressor systems, or positive pressure environments. The unit provides a single SPDT contact for direct equipment control. It suits technicians and facility managers needing reliable air flow verification.

Adjustable Range 0.02 to 12 in wc

The switch operates across a differential pressure range from 0.02 inches of water column up to 12 inches of water column. It handles a maximum pressure rating of 0.5 psi. Electrical rating supports 15 amps non-inductive at 277 volts AC with a 115 volt AC input. Operation extends to a maximum temperature of 190 degrees Fahrenheit.

Steel Conduit Box With Hardwired Connection

The housing uses steel construction formed as a conduit box for durable mounting. Electrical connections are hardwired terminals inside the enclosure. Mounting screws are included for installation on ductwork or equipment panels. The SPDT contact form allows flexible wiring for either normally open or normally closed control circuits.

Highlights

  • Adjustable pressure range up to 12 in wc for precise differential detection
  • 15 A non-inductive rating at 277 V AC handles heavy control loads
  • Steel conduit-box housing withstands 190 °F maximum operating temperature
  • SPDT hardwired contacts suit positive pressure and air compressor applications
  • Includes mounting screws for quick installation on 115 V AC systems

Specifications

BrandTJERNLUND
ColorSteel

Questions about this item

Will the PS2501 pressure switch work with my existing 115V AC furnace control circuit?

Yes, the PS2501 is rated for 115V AC input voltage and its SPDT contacts handle 15 A non-inductive loads up to 277V AC, so it can directly switch typical furnace control circuits.

How can I verify the PS2501 is sensing differential pressure correctly after installation?

Apply a known differential pressure up to the 12 in wc maximum setting; the switch should actuate at the adjusted set point between .02 and 12 in wc, which you can confirm by measuring continuity across the SPDT terminals.

Does the PS2501 package include the mounting hardware and conduit fittings needed for installation?

The box includes mounting screws for the steel conduit-box housing; you must supply your own conduit, wire connectors and hardwired cable to complete the electrical connections.

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