Resideo Air Pressure Switch Product, Style E121

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. Features 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. Specifications 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