Current location:
Homepage
/
/
/
Temperature measurement principle of optical pyrometer

News Center

Check category

Temperature measurement principle of optical pyrometer

(Summary description)Any object at high temperature will project a certain wavelength of electromagnetic waves (radiant energy). The visible light with a wavelength of 0.65μm electromagnetic wave is the most sensitive to human eyes, and the radiant energy of this wavelength changes significantly with temperature.

Temperature measurement principle of optical pyrometer

(Summary description)Any object at high temperature will project a certain wavelength of electromagnetic waves (radiant energy). The visible light with a wavelength of 0.65μm electromagnetic wave is the most sensitive to human eyes, and the radiant energy of this wavelength changes significantly with temperature.

Information


Any object at high temperature will project a certain wavelength of electromagnetic waves (radiant energy). The visible light with a wavelength of 0.65μm electromagnetic wave is the most sensitive to human eyes, and the radiant energy of this wavelength changes significantly with temperature. The magnitude of visible light energy is reflected in its perception of the brightness of the human eye. The higher the temperature of the object, the stronger the visible light energy it emits, that is, the brighter the visible light seen.

optical pyrometer china

The method of measuring temperature with an optical pyrometer is to compare the brightness of the measured object at a wavelength of 0.65 μm with the brightness of the filament of the pyrometer powered bulb installed inside the meter. When the brightness of the filament of the meter is the same as the brightness emitted by the object to be measured, it means that The filament temperature is the same as the temperature of the object being measured. Because the brightness of the filament is determined by the current passing through the filament, and each current intensity corresponds to a certain filament temperature, the temperature of the filament can be known by measuring the current, that is, the temperature of the object to be measured. Therefore, this pyrometer is also called a hidden wire optical pyrometer.

However, the optical pyrometer uses human eyes to detect the brightness deviation after all, and also manually adjusts the brightness of the standard lamp to eliminate the deviation to achieve a balanced state of the two (the filament image disappears). Obviously, only when the measured object is high temperature, that is, when the red light band (λ=0.65μm or so) in the radiation light has sufficient intensity, the optical pyrometer can work.

RECOMMEND NEWS

2022
09-22
小黑点

The working principle and characteristics of different pyrometers

Thermocouples use this principle to measure temperature. One end that is directly used to measure the temperature of the medium is called the working end,
查看详情
2022
09-20
小黑点

Colorimetric Pyrometer Applications

It is made according to the principle that the ratio of the radiation intensities of the two wavelengths in the radiation emitted by the heated object changes with the actual temperature of the object.
查看详情
2022
09-16
小黑点

The use and classification of various thermometers

Refers to thermometers specially used to measure temperatures over 500°C, including optical thermometers, colorimetric thermometers and radiation thermometers.
查看详情
迪凯光电

400-811-6877

Tel:027-8750 9386   027-8750 9105
Add:Dingye building C block, International Enterprise Center, Optics Valley Avenue, Wuhan China  
Fax:027-87745185   
Mail:dkoe@chinadikai.com