The Setra 2641005WD11T1C is a precision low differential pressure transducer designed to monitor air pressure from 0 to 5 inches of water column with ±1% accuracy and a 4–20 mA output. Its sensing element detects pressure differences across ducts, filters, and air-handling components, converting them into a proportional electrical signal for building automation and control systems. https://www.partshnc.com/2641005wd11t1c-setra-0-5-wc-trnsmtr-4-20maout-1