Labfacility ptfe exposed junction fine wire thermocouples labfacility xe 3521 001 an exposed junction t type thermocouple with 2m of ptfe insulated twin twist 102mm wire the thermocouple has a fast response and a temperature range of 75degc to 250degc making it ideal for test and development work labfacility xe 3521 001 type t 2 metre ptfe insulated fine wire exposed