Principle of two-color infrared thermometer_Advantages of two-color infrared thermometer
The two-color thermometer works based on the following principle: under two selected infrared wavelengths and a certain bandwidth, the ratio of their radiant energy changes with the change of temperature. Using two sets of different monochromatic filters with very narrow bandwidths, the radiation energy in two similar bands is collected, converted into electrical signals and then compared. Finally, the temperature of the measured target is determined from the ratio, so it can basically Eliminate the inconvenience of adjusting the emissivity of the target material. The use of a two-color thermometer has higher temperature measurement sensitivity, smaller deviation from the true temperature of the target, and is less affected by the test distance and absorbers in between. It is effective in the medium and high temperature range. Better.
Advantages of two-color infrared thermometer
Advantages of using two-color thermometer in polysilicon production
(1) The principle of dual colorimetric thermometry is used to directly measure the true temperature of the target, which is basically not affected by the emissivity of the material and does not require emissivity compensation.
(2) Visual aiming, the target can be directly seen.
(3) Not sensitive to slight contamination of windows.
(4) It gets rid of the dependence on the absolute energy of infrared and is not sensitive to signal attenuation.
Advantages of using a two-color thermometer in a vacuum sintering furnace:
(1) Temperature measurement is not affected by light path pollution.
(2) Not sensitive to window pollution.
Advantages of using a two-color thermometer in a salt bath furnace:
(1) Temperature measurement is not affected by smoke pollution.
(2) Slight contamination of the thermometer lens will not affect temperature measurement.
Advantages of using a two-color thermometer for hot rolling of billet and steel strips:
(1) There is no impact on emissivity due to oxide scale.
(2) The lens of the two-color infrared thermometer is slightly contaminated and does not affect the temperature measurement.
