PTFE Insulated Flat Pair Thermocouple Cables. PTFE insulated flat pair cables Single pair of PTFE insulated conductors, laid flat with PTFE jacket Good mechanical strength and flexibility, resistant to oils, acids and other adverse fluids Suitable for steam & pressure applications, autoclaves, sterilisers etc. Thermocouple types K, J, & T with 7/0.2mm stranded conductors 1/0.3mm solid conductor option available for type T 10, 25 & 50 metre reel lengths