To eliminate the operation for inserting a temperature sensor by indirectly measuring the temperature of a cooled body and to stably and automatically measure the temperature of the cooled body.
This instrument is equipped with a cooling tank 2 which contains the cooled body 1 and provided with a water tank 11 communicating with this cooling tank 2, and this water tank 11 is provided with a wet-bulb temperature sensor 12. A pressure arithmetic means 15 calculates pressure according to the detected temperature of the wet-bulb temperature sensor 12. An outside air intake line 5 is connected to the cooling tank 2 containing the cooled body 1, the water tank 11 is provided for the outside intake line 5, and the wet-bulb temperature sensor 12 or a temperature sensor 13 is provided for the water tank 11. A heat exchanger 6 is provided to a vacuum suction line 4 connected to the cooling tank 2 and the heat exchange 6 exit side of a cooling water circulation line 16 provided for the heat exchanger 6 and the water tank 11 are connected together by a water resupply line 17.
YANAGIHARA NOBUAKI
TSUBOTA YOSHIMI
MATSUYA HISAMI
TATEISHI SEIYA
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