kata thermometer

noun1

1. •
   A device consisting principally of an alcohol thermometer, used to measure air cooling power and, indirectly, small wind speeds in circulating air, by measuring the time taken for the temperature of the bulb of alcohol to make a specified drop (100° to 95°F).

   • Though the kata-thermometer was originally designed for measuring human comfort, it afterwards turned out to be far more useful as an anemometer. — 1945