What are the advantages of the two color pyrometer compared to the monochromatic thermometer? Do you know? Today, let's learn about it together!

In temperature measurement, the two color pyrometer does not change with the surface state of the object (the surface roughness is different, or the chemical state of the surface is different), and does not affect the accuracy of temperature measurement, while the monochromatic pyrometer will be affected.

The optical part of the thermometer, such as glass, will leave some dust after being used for a period of time. Water, gas, oil, etc. in the air will reduce the emissivity coefficient, so the monochromatic thermometer often measures when it is in use. The temperature will decrease. The two color pyrometer measures the ratio of objects in two specific bands. When the dust, water vapor and other substances in the two bands change, the measured signal decreases at the same time. After division, the ratio remains unchanged. But this does not mean that the use of the two color pyrometer does not require maintenance. When dust, moisture, etc. are too dirty, the glass needs to be wiped.

Monochromatic thermometers cannot measure objects smaller than the field of view. If the target cannot fill the field of view, the measurement temperature will be lowered. The two color pyrometer can measure objects with a small field of view.

The above is the advantage of the two color pyrometer compared to the monochromatic thermometer. I hope it will help you!