L.H. Marshall has constantly improved and refined the original enclosed-tip thermocouple, so that today it's unsurpassed for accurate and reliable readings.  They are fast, accurate temperature probes for molten brass, aluminum, copper and other non-ferrous metals.  Armored tip construction and Special Limits Class 1 wire assures accurate readings with up to 25% more pours per tip.  The result: higher quality castings at lower cost.