The Siemens 536-767-25 Liquid Immersion Temperature Sensor is a platinum sensing device designed to measure temperatures from 30°F to 250°F in HVAC systems such as chillers, boilers, and hydronic heating units. It operates by detecting temperature changes within liquid mediums and transmitting accurate readings to the control system for precise temperature regulation. https://www.partshnc.com/imm-temp-sensor-plat30250