The York S1-324-35972-000 Pressure Switch Kit is a precision device used to monitor and control pressure levels in HVAC systems. With a pressure rating of 0.10" WC (Water Column), this pressure switch provides precise measurement and control in low-pressure settings. This pressure switch works by detecting pressure changes in the system. https://www.partshnc.com/010-wc-pressure-switch-york-s1-324-35972-000