Labfacility pfa exposed junction fine wire thermocouples with miniature plug labfacility xe 3531 001 a type k thermocouple with a 5m long pfa insulated twin twisted lead having a conductor of 702 stranded wire a welded exposed junction guarantees a fast response and the thermocouple is fitted with a miniature plug ideal for test and development applications labfacility xe 3531 001 type k pfa insulated twin twisted thermocouple