| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly-accurate and inexpensive in-furnace temperature measuring device capable of measuring temperature, even when a temperature sensor is installed in a high temperature environment. SOLUTION: This device is equipped with an in-furnace temperature sensor part 19 for measuring the temperature in a furnace 40, a water-supply and air-supply device 35 for supplying the in-furnace temperature sensor part 19 with cooling water and cooling air, and a control device 5 for controlling the in-furnace temperature sensor part 19 and the water-supply and air-supply device 35. The in-furnace temperature sensor part 19 has an upper part 7 where an electronic circuit or the like is loaded, a cooling cylinder 11 for cooling an infrared sensor, a support member 12 extending from the tip of the cooling cylinder 11, and a temperature measuring target 13 installed on the tip of the support member 12. In this means, the in-furnace temperature is determined by being converted from the infrared radiant quantity from the temperature measuring target 13.
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