LEFOO AIR PRESSURE SWITCH /LF31 /for funace/ Air Differential Pressure Switch/
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Catalog excerpts

Dimension in:mm LF31 switches offer pressure, vacuum and differential models capable of sensing very low setpoints, and switching current up to 5A resistive, 2.5A inductive. Designed for use in the HVAC industry, where reliable air proving is critical to both performance and customer safety. The LF31 is a favorite with leading manufacturers ofgas-fired warm air furnaces and water heaters.

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