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Robertshaw 2374-503 air pressure switch conduit box stainless steel housing

Robertshaw

Robertshaw 2374-503 Air Pressure Switch Conduit

SKU CH-MF6E-JQXQE

Adjustable SPDT air-pressure switch in a stainless-steel conduit box for HVAC and filtration systems

  • Adjustable SPDT switch suits HVAC and filtration systems
  • 1 A pilot duty at 120 VA handles control circuits
  • 5 A rating at 120–277 V AC powers commercial units
  • Stainless steel conduit box protects contacts in harsh environments
  • Includes adjustment tool and mounting hardware for quick setup

Robertshaw 2374-503 Air Pressure Switch

The Robertshaw 2374-503 is an adjustable air pressure switch designed for air filtration, furnace control, and humidity detection in commercial and residential HVAC systems. It features a stainless steel conduit box housing with a SPDT contact form rated for 5 A at 120 to 277V AC and 28V DC. The switch includes an adjustment tool and mounting hardware for installation.

Conduit box housing with screw terminals

The conduit box housing provides a protected enclosure for wiring connections via screw terminals. It operates on input voltages of 120V AC, 277V AC, and 28V DC, with a pilot duty rating of 1 A at 120 VA. The unit mounts directly in the system and requires no additional housing components for standard HVAC control panels.

HVAC technicians and system integrators

This switch suits professionals configuring air proving or safety interlocks where a 0.8 in wc maximum differential pressure setting meets the application requirements. It is not intended for installations needing higher pressure differentials, alternative contact configurations, or wireless connectivity. Buyers requiring different electrical ratings or housing styles should evaluate other models.

Highlights

  • Adjustable SPDT switch suits HVAC and filtration systems
  • 1 A pilot duty at 120 VA handles control circuits
  • 5 A rating at 120–277 V AC powers commercial units
  • Stainless steel conduit box protects contacts in harsh environments
  • Includes adjustment tool and mounting hardware for quick setup

Specifications

BrandROBERTSHAW

Questions about this item

At what differential pressure does the 2374-503 stop increasing its setting?

The maximum differential pressure setting is .8 in wc, so the adjustment range ends there.

How hot or loud does the stainless steel conduit box get during continuous HVAC duty?

The switch itself has no moving parts that generate heat or noise; the conduit box simply houses the screw terminals and stays at ambient temperature.

Which voltage supply must the installer provide for the screw terminals to operate?

The switch is rated for 120V AC, 277V AC or 28V DC input, so the site must supply one of those voltages.

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