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Kestrel Instruments which measure Humidity Ratio (Grains)

Kestrel Instruments which measure Humidity Ratio (Grains)

This weight of water is expressed either in pounds of water per pound of dry air or in grains of water per pound of dry air, and is called the Specific Humidity, or Humidity Ratio. A grain of water is approximately one drop, and there are 7,000 grains of water to one pound of water.