Kata thermometer

Kata cooling power The rate of cooling of a silvered or unsilvered kata thermometer due to the relationship between the air temperature and the air velocity over the bulb. 

Kata thermometer A thermometer that allows the air velocity to be determined by its cooling power. 

Thermometer anemometer An instrument that measures the heat removed by an air stream passing over a heated element or bulb to determine the air velocity. See Kata thermometer. 

KATA THERMOMETER - Large-bulb alcohol thermometer used to measure air speed or atmospheric conditions by means of cooling effect. 

A globe thermometer is a thermometer inserted into a matt black copper globe. This provides a measure of radiant (infra-red) heat energy. A simple eqiration gives the mean radiant temperature from the globe temperature. Air velocity, if it is in one clear direction, can be measured with a vane anemometer otherwise a Kata thermometer or hot-wire anemometer can be nsed. The Kata thermometer is warmed and then the time for temperatiue drop between two poirrts observed. A chart gives the airflow. 

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