Welcome to The Happy Camper Club. Happy Camper is a discount club for RVers and campers of all types. As a member, you can stay at over 1,200 quality RV parks on a full hook-up site for up to half price; and unlike other memberships, it requires no contracts, no home parks, and no point systems.
Level of liquid or gas in the tube â The appropriate volume of liquid or gas in the tube depends on the expansion coefficient of the substance used, the area of the capillary and the range of temperature required. Bimetal or bi-metallic thermometers use a bimetal spring as the temperature-sensing element.
A THERMOMETER measures the air temperature. Most thermometers are closed glass tubes containing liquids such as alcohol or mercury. When air around the tube heats the liquid, the liquid expands and moves up the tube. A scale then shows what the actual temperature is.