Aspiration psychrometer with case

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Aspiration psychrometer - Soviet-era meteorological measuring device, designed to determine the relative humidity of the air. The device was manufactured in 1984 (USSR), preserved with the original case and instructions.

The psychrometer works with two thermometers (dry and wet), but the aspiration mechanism provides air flow for more accurate measurements.
The set includes a psychrometer with two thermometers, an original plastic case, instructions in Russian, the accessories shown in the picture Condition: Used, with visible signs of wear. The exact operation has not been checked.

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