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Johnson Controls P32AF-13C Sensitive Differential Pressure Switch (0.03 to 1.4" WC) - The P32 differential pressure switch is used to sense flow of air in ducts. When used with electric strip heaters, the switch can be wired to open the circuit and deenergize the heaters when air flow stops.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.