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A respirometer is a device which is used to measure respiration, where organisms exchange carbon dioxide and oxygen as part of their metabolism.
Sling psychrometer. A sling psychrometer for outdoor use. A sling psychrometer works when the scientist spins two thermometersthrough the air, one plain and one with a wet cloth around it. The dry thermometer measures the air temperature. The wet thermometer measures the dew point, because the wet cloth is cooled as the thermometer spins.