The sensor body is manufactured by Airpax, as indicated by the markingsAIRPAX 412649 5024-0171. MPN (Manufacturer Part Number): 41-2649 (Thermo King) / 412649, 5024-0171 (Airpax). It is also marked with the Airpax part numbers412649 and5024-0171 on the brass probe body.
eBay