Advantages of dual-color infrared thermometer
Principle of dual color infrared thermometer
The dual color thermometer works based on the following principle: the ratio of their radiated energy varies with temperature at two selected infrared wavelengths and a certain bandwidth. By using two sets of narrow bandwidth monochromatic filters, the radiation energy in two similar frequency bands is collected, converted into electrical signals, and then compared. Finally, the temperature of the measured target is determined based on this ratio. Therefore, it can basically eliminate the inconvenience of adjusting the emissivity of the target material. The use of a two-color thermometer has high temperature sensitivity, small deviation from the true temperature of the target, and is less affected by the test distance and the absorption of substances between them. It has good performance in the medium and high temperature range.
1, Advantages of using dual color thermometers in polycrystalline silicon production
(1) The principle of dual color temperature measurement is used to directly measure the true temperature of the target, without being affected by material emissivity and without the need for emissivity compensation.
(2) Visual aiming allows direct visibility of the target.
(2) Not sensitive to slight contamination of windows.
(3) Free from dependence on absolute infrared energy and insensitive to signal attenuation.
2, Advantages of using dual color thermometers in vacuum sintering furnaces:
(1) Temperature measurement is not affected by light path pollution.
(2) Not sensitive to window pollution.
3, Advantages of using a dual color thermometer in a salt bath furnace:
(1) Temperature measurement is not affected by smoke pollution.
(2) Slight contamination of the thermometer lens does not affect temperature measurement.
4, Advantages of using dual color thermometers for hot rolling of steel billets and strips:
(1) There is no emissivity impact caused by oxide skin.
(2) The lens of the dual color infrared thermometer is slightly contaminated and does not affect temperature measurement.
