| 摘要 |
PROBLEM TO BE SOLVED: To provide a column thermostatic oven capable of executing high- precision temperature control, and having a temperature distribution in the bath hardly influenced by an outside air temperature. SOLUTION: A heater 3 and a temperature sensor 4 are installed in the inside space 1a of this column thermostatic oven 1, to execute temperature control by a temperature control part, and simultaneously an outside air is taken in by a flap 9, to execute temperature control. In this case, a preparatory heater 21 and a temperature sensor 20 for measuring the outside temperature are installed in an intake passage 7a, to keep the temperature of the outside air passing through the intake passage 7a constant, and to avoid being influenced by fluctuation of the outside air temperature.
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