Application Metal SheetsTemperature measurement of bright metal sheets at low temperatures in terms oF

Application note Metal Sheets on-contact temperature measurement N of metal sheets The measurement of metal sheets at low temperatures is still a challenging measuring task in the field of non-contact measurements due to the very low thermal radiation and the special radiation properties of metals. For physical reasons only longwave pyrometers with a spectral sensitivity of 8 - 14 µm can be used for measurements starting at room temperature. However, the emissivity of metals, i.e. the ability to emit thermal radiation, significantly decreases with a longer wavelength, which, in turn, increases...

This signal peak is detected by the peak picker which is integrated into the pyrometer. The measurement interval of the peak picker is selected according to the set swivel period. As a result, the varying signal becomes a continuous temperature value. • The larger the coil, the narrower is the formed gap. • The narrower the gap, the higher is the number of reflections. • The higher the number of reflections, the higher is the artificial increase of the emissivity. • The higher the emissivity, the higher is the temperature signal received by the pyrometer. Consequently, a larger coil diameter...

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