Duct Limit Switch

Our duct limit switch products are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature exceeds a pre-set limit.

Our CEMCO Firestat duct limit switch division commonly are installed in apartment complexes or equipment that require several units.

At Senasys, price and lead time is quantity based and units are made to order. To get the best possible price and lead time on a direct replacement option for A25AN-1 Warm Air Limit Control, we recommend sending in a request for quote with your estimated annual usage to our inside sales team for quantities greater than 100.

The Duct High Temperature Switches feature a helix bimetal element that senses rapid increases in duct temperature, such as those caused by fire. The high temperature limit then operates an SPST switch that opens with a rise in temperature. A manual reset button reactivates the temperature limit after the high-temperature condition has cleared. These duct high temperature limits are indispensable in specialized HVAC applications and Building Automation Systems.

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