SJ Gauge's bimetal thermometers and gas-actuated expansion thermometers provide easy-to-read temperature measurement on a dial indicator — without the use of mercury (dangerous and regulated).
What's the bimetallic thermometer and gas-actuated thermometer? And how do they work?
The bimetal thermometer is moved by spiraled metal sheets. When the temperature changes, the spiral either rolls up or loosens due to the different level of expansion or contraction of each metal sheet, causing the pointer to indicate the corresponding temperature. The gas-actuated thermometers use expanding or contracting gas in a closed bulb and capillary system. ...click for more information.
Bimetal stems, capillaries and associated thermowells are available in a wide selection of lengths. Choose from sanitary tri-clamps and switch contacts to fit nearly any application.