Hydrolevel 48-3250-60 12" Replacement Hydrostat Sensor is a sensing component designed to monitor water temperature and level in compatible boiler control systems. It works by transmitting accurate operating data to the Hydrostat control, enabling precise burner operation and low water cut-off protection for safe, efficient heating. This replacement sensor is commonly used in resident... https://www.partshnc.com/48-3250-60-hydrolevel-replacement-hydrostat-sensor