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

Its polished brass construction offers superior corrosion resistance

Use a screwdriver to align the desired turn-on temperature with the indicator mark before mounting

providing reliable signal integrity even in high-ambient environments

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Cleveland Controls DFS-221-347 Air Flow Switch This discharge air temperature sensorThe 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