Labfacility ptfe exposed junction fine wire thermocouples labfacility xe 3505 001 an exposed junction k type thermocouple with 1m 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 3505 001 type k 1m ptfe fine wire exposed with miniature plug