Manufacturer Name: Siemens Building Technology Product Number: QAE2012.010 OEM Part Number: QAE2012.010 Product Description: Imrsntempplatsnsr,1000Ohm,4" Weight:0.69lbs/312.98g The Siemens QAE2012.010 Immersion Temperature Sensor allows to monitor temperatures accurately with HVAC systems. This sensor has a platinum sensing element (Pt1000) with a 4" probe length https://www.partshnc.com/qae2012010-siemens-building-technology-imrsntempplatsnsr1000ohm4