FIELD: measuring equipment, in particular, hygrometry, applicable in all branches of industry for calibration and check-up of hydrometers.
SUBSTANCE: the device has temperature and pressure meters, liquid thermostat with a saturator placed in it, thermostatic control system including a treat exchanger, thermostatic switch and two electric refrigerant feeding devices, the thermostatic control system additionally includes a refrigerant feeding pneumatic device, whose output is connected to the output of the electric refrigerant feeding device. In the second modification the body of the electric refrigerant feeding device has an additional channel made in parallel with the main one, in which a flow restrictor for refrigerant flow-rate control is built in.
EFFECT: enhanced accuracy.
2 cl, 2 dwg
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