How Does a Six's Thermometer Work?

By Staff WriterLast Updated Apr 3, 2020 3:49:18 AM ET

A Six's thermometer functions by using alcohol to expand or contract the mercury inside to display both the highest and lowest temperatures of a given time period. There are bulbs at the top of each arm of the tube, one above each indicator. The bulb above the minimum indicator tube typically contains alcohol while the bulb atop the maximum indicator tube contains a vacuum.