Danfoss 060-205191 KP1 Pressure Controller with 36-inch Capillary is a pressure control device designed to monitor and regulate system pressure in compatible HVAC and refrigeration equipment. It works by sensing pressure changes through the capillary tube and automatically opening or closing electrical contacts to control compressors or other system components. https://www.partshnc.com/kp1-pressure-controller-36cap-for-danfoss-part-060-205191