Manufacturer Name: Siemens Building Technology Product Number: 544-577-25 OEM Part Number: 544-577-25 The Siemens 544-577-25 Liquid Immersion Temperature Sensor is a high-precision instrument for monitoring liquid temperatures in HVAC systems. The platinum detecting element in this sensor, which has a 1000 Ohm resistance, is renowned for its precision and stability across a broad... https://www.partshnc.com/imm-snsr-40240-1000ohm-plat