The Johnson Controls DP150MR2-SA Pressure Transducer is a precision sensing device designed to measure low differential air pressure in HVAC systems, with a 0–10 PSI range and selectable measurement ranges of 1", 2.5", 5", and 10" water column. It works by detecting pressure differences and converting them into electrical signals for building automation and control systems. Common app... https://www.partshnc.com/dp150mr2-sa-johnson-controls-pressure-transducer-0-to-1-2-5-5-10-0-10-psi