The Ringway Temp2wire is a loop powered temperature transducer that produces a 4 - 20mA signal that is proportional to 0 - 150 degrees Celsius. The sensor housing is cast iron, with a 3/4" B.S.P. brass threaded temperature sensor attachment. When screwed into a gallery the electronics can be removed / changed out without releasing any of the process material (oil, water etc). The cast iron housing has a 20mm threaded conduit entry, is IP65 rated and is tremendously strong. Access to the electronics and field connection terminals is via a screw on cover with an 'O-ring' seal.