Thermocouple extension wire 1.Conductors:Positive-Iron, Negative-Constantan 2.Insulation:Braid ... AWG, standard tolerances.2, TECHNICAL FEATURESA. Conductors: Stranded thermocouple extension wire Conductor Size (AWG)No. of Strands & Gauge247/32 AWG (Ø0 ... ,2°C or 0.75%±1,1°Cor 0,4%Thermocouple type available: KX, JX, TX, EX, NX, RX,SX ... .1±0.15 Type JX- 2x24AWG SIL/SIL - ANSI Thermocouple Extension Wire