Its polished brass construction offers superior corrosion resistance

leak-proof fit for field replacements or new installations

This discharge air temperature sensor is built to withstand high-duty cycles in residential forced-air applications

Bypassing is strictly for temporary continuity testing

this is a proprietary Johnson Controls replacement part engineered specifically for the mechanical specifications of their Penn series control shafts

Cleveland Controls DFS-221-347 Air Flow Switch Its polished brass construction offersThe Cleveland Controls DFS 221 347 Air Flow Switch is a high performance, non adjustable differential pressure switch designed for precise air flow proving in duct heaters, ovens, and technical HVAC applications. This SPDT air flow switch is fixed to operate on a pressure rise at . 05" . 02" w. c., ensuring consistent system monitoring without the risk of field adjustment errors. Capable of sensing positive, negative, or differential pressure, it