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Temperature gauges operate on the gas-actuated, bimetal or expansion principle. They can measure temperatures between -200 … +700 °C. All instruments are also suitable for operation in thermowells.
Temperature gauges measure the thermal state of a homogeneous substance. The measuring system must be brought as closely together as possible with the body to be measured. The most widely used measuring methods rely on temperature-dependent physical and material characteristics.
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Bimetal temperature gauges operate with a measuring system in the form of a helical or spiral tube. Bimetal temperature gauges are available with a scale range of -70 ... +600 °C in accuracy classes 1 and 2 in accordance with EN 13190.
An expansion temperature gauge consists of a temperature sensor, a capillary and a Bourdon tube. The measuring system itself is filled with a liquid. Using capillaries from 500 to 10,000 mm long, measurements can also be taken from remote measuring points. The scale ranges for expansion temperature gauges lie between -40 ... +400 ° C with class 1 and 2 accuracies in accordance with EN 13190.