Bypassing is strictly for temporary continuity testing

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providing reliable signal integrity even in high-ambient environments

Constructed from durable metal

25" HI-TEMP GASKET engineered specifically for high-demand dielectric union replacements

Cleveland Controls DFS-221-347 Air Flow Switch Bypassing is strictly for temporaryThe 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