Labfacility type k and j industrial thermocouples with terminal head labfacility xe 3261 001 a type j thermocouple with a 500mm long probe that is protected by a 321 stainless steel sheath the probe is terminated in a weatherproof aluminium terminal head with a screw fit lid the weatherproof terminal head and stainless steel sheath make this thermocouple ideal for use in harsh environments and external situations labfacility xe 3261 001 j thermocouple 6 x 500mm ss321 sheath terminal head