Bimetal thermometers are available in dial diameters from 2 to 5" and in ranges from -80 to 1,000°F (-62 to 538°C). Standard stem lengths range from 2.5 through 24" with special order stems up to 60". Duratemp gas-actuated and direct-drive thermometers use the principle of gas expansion to accurately transmit temperature changes through a gas-filled capillary to a remotely located gauge. Dial sizes from 4.5 through 8.5" provide easy reading over capillary lengths of 80'. Thermowells protect thermometer stems or bulbs from high velocity, pressurized or corrosive media.
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