Ashcroft Pt100 [840X010-06] RTD Probe with 5ft Coiled Cable (with Handle), 6 inches x 0.25 inch . Ashcroft 840X010-06 PT100 4-wire RTD Temperature Probe for use with Hand Held Calibrator. (385 coefficient), 1/4 inch (0.25) diameter, 6 inch length, 304 stainless steel sheath, handle, and 5 ft. coiled cable. TA4F electrical connector for compatibility with AM2-RT1 interface modules. DIN Class A accuracy.