The standard probe contains an ungrounded thermocouple assembly with a general purpose (GP) aluminum head. A terminal block is mounted on the interior of the GP head. The GP head has 1/2 inch NPT mounting threads and conduit outlet. This assembly is available with a four inch long stainless steel support tube for use with adjustable mounting fittings. The support tube is an 1/8 inch larger in diameter than the sheath diameter.