bimetalvyötermometrit

bimetalvyötermometrit, or bimetal band thermometers, are mechanical temperature sensors that convert thermal expansion into a readable scale. They consist of two strips of dissimilar metals bonded together and wrapped into a band or coil. The two metals have different coefficients of thermal expansion; as temperature changes, the strip bends, and this motion is translated into a dial or scale by a mechanical transducer. When the device is positioned against a heat source, the bending creates a measurable shift that can be read directly without the need for electronic circuitry.

The basic principle behind bimetalvyötermometrit derives from the Hooke’s law and the differential expansion concept first described by Alfred V. A. by 1858. Early versions used simple flat strips mounted in a brass plate, while later models employed spiral or banded designs to improve sensitivity and durability. The band construction allows for a greater effective length of the bimetal strip, giving finer resolution over a specified temperature range. Typical temperature ranges span from –50 °C to 200 °C, with resolution of 0.1 °C to 0.5 °C depending on the design.

These thermometers are valued in industrial and scientific applications where robustness, low cost, and resistance to electromagnetic interference are essential. They are commonly found in HVAC systems, process control panels, and laboratory equipment. Modern configurations often integrate a digital readout to enhance accuracy, but the core bimetal band remains unchanged. Compared to electronic thermocouples and RTDs, bimetalvyötermometrit offer a passive, self-powered alternative that requires no external power source and can operate in hazardous environments where electronic components might fail.

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