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A pyrometer or pyrometric cones are used to measure furnace and kiln temperatures resulting from radiant heat. A pyrometer is a ceramic base into which 4 to 6 pyrometric cones, which melt at different temperatures, are inserted. Placing this into a furnace opening which is out of the normal gas passes, in direct view of the flame, and can be sealed from in-leakage of cooler air, will give you a general idea of a flame temperature (radiant heat). If it is inserted into a gas pass it will give convective heat temperatures. By knowing the temperature at which each cone melts you can get a close approximation of a flame or furnace temperature.

More modern line of sight infrared-laser thermal imaging guns can give direct readings of surface or flame temperatures, and are more accurate. Thermocouples though must be used in convective gas passes.

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12y ago

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