this unit supports surface and DIN rail mounting

24" WC threshold

featuring a robust ceramic insulator that prevents signal grounding issues

Key Benefits Optimized Airflow Geometry: The 24-inch diameter is precision-tapered to guide air efficiently through the fan assembly

its compact low-profile housing includes 1/2" NPT inlet and outlet ports

Cleveland Controls AFS-953-B Sensing Switch Els PW 17895 this unit supports surface andThe Cleveland Controls AFS 953 B is a contractor grade differential pressure sensing switch engineered for high accuracy monitoring of air and non combustible gases in commercial HVAC draft control systems. This SPDT air pressure switch features a versatile field adjustable set point range from 0. 05" w. c. to 12. 0" w. c., providing precise airflow proving for combustion air, furnace pressure, and blower operation. A critical feature for technicians