915 Series with Transmitter RTD, -50 DegF to 750 DegF, Class B Accuracy, PT100 Element, Single, 3-Wire, 4 mA to 20 mA, 2-wire, Upscale Burnout Output, 1/2 in. Stem Dia Standard head-type RTD assemblyA variety of head types are availableFactory Mutual and Canadian Standards approved explosion proof models availableTransmitter available, fits standard heads NPT Conduit, Polypropylene Connection Head, 2.