Pros, Join Our TradeMaster Program!
Airflow Differential Pressure Switches are used to sense positive, negative, or differential air pressure in HVAC systems. They provide high or low limit with alarm or high limit shutdown with manual reset.

  • Models available with compression or barb fittings.
  • SPDT contacts on automatic reset models SPST n.c. contacts on manual reset models.
  • Electrical switch enclosed in metal box with cover.
  • Reliable pneumatic operation. UL and CSA Listed, FM approved.
  • Adjustable setpoint.

  • Description: Airswitch Product, Style E121, Adjustable Range .05"±.02" wc to 12.0" wc PR. Yellow Label
  • Connection Type: 1/4 in. Compression
  • Setpoint: 05"±.02" wc to 12.0" wc PR
  • Electrical Ratings: 15 Amps resistive to 277 Vac
  • Electrical Switch: SPDT
  • Max Operating Pressure: 1/2 psi
  • Additional Features: Switching Differential: .02"±.01" wc @ minimum set point to approximately .80" wc @ maximum set point
  • Dimensions: 5.0 in. Diameter
  • Operating Temperature Range (F): -40 F to +190 F
  • Pilot Duty Ratings: 278 Va @ 24 Vac
Hide Description
Manuals (1)
Setpoint Range:

0.05" to 12.0" WC


Product Review

Product Q&A

Add-on Item

This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.