The standard probe contains an ungrounded thermocouple assembly with a transition junction. A stress relief spring and 36 inches of fiberglass insulated #20 gage (0.032") extension leads. The extension leads are shielded with a stainless steel over braid. The standard thermocouple is also available with a four inch support tube attached to the transition end. The purpose of the support tube is to eliminate any damage to the refractory sheath that may be caused by the mounting bushing. The support tube is an 1/8 inch larger in diameter than that of the thermocouple sheath. If a support tube is desired, add the suffix (ST) to the part number.
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