Seek the specific value of the emissivity for infrared temperature measurement in hydrogen production conversion tubes
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This post was last edited by chenlin_g on 2016-2-10 01:59. Recently, I used an infrared thermometer to measure the temperature of hydrogen production conversion tubes; however, there is no specific value for the emissivity, and no exact figures are available online (on Baidu). One can only estimate it by referring to tables, with some sources suggesting values around 0.8–0.9, but this results in significant errors. Do any of you have more accurate values? ? ?
For temperature measurement, don’t you just check the temperature? Why bother with that?
I don’t understand what you mean; without a thermocouple as a temperature reference, a simple infrared thermometer cannot provide accurate readings.
Don’t infrared guns display temperature directly?
There is a parameter called infrared emissivity, which needs to be set according to different objects.
Generally speaking, the higher the emissivity of the temperature gun matches that of the object being measured, the more accurate the results will be. Of course, the emissivity of metals is usually below 0.9, and the emissivity of actual objects depends on their surface conditions, including surface temperature, surface roughness, as well as the presence of surface oxides, impurities, or coatings. So you can determine a fixed value between 0.8 and 0.9 for long-term reference.