psychrometer

• Instrument scientifique utilisé pour mesurer l'humidité de l'air, composé de deux thermomètres, l'un sec et l'autre humide ; la différence de leurs lectures indique la sécheresse de l'air ambiant.

A scientific instrument used to measure the humidity of air, consisting of a dry-bulb thermometer and a wet-bulb thermometer; the difference in their readings indicates the dryness of the surrounding air.

1. Hygrometer with two thermometersC2formalscientific

   An instrument used to measure the humidity of air, consisting of a dry-bulb thermometer and a wet-bulb thermometer; the difference in their readings indicates the dryness of the surrounding air.

   Psychromètre

   • The meteorologist used a psychrometer to measure the relative humidity.
   • A sling psychrometer is spun in the air to get an accurate reading.
   • The difference between the dry-bulb and wet-bulb temperatures on the psychrometer helps calculate dew point.