Enter the measured temperature and the emissivity of the material into the calculator to determine the true temperature. The calculator applies a correction based on the emissivity value provided.

Emissivity Correction Formula

The following formula is used to calculate the true temperature of an object based on its measured temperature and emissivity.

TT = MT / ε

Variables:

  • TT is the true temperature (°C)
  • MT is the measured temperature (°C)
  • ε is the emissivity of the material (dimensionless)

To calculate the true temperature, divide the measured temperature by the emissivity of the material. The emissivity is a measure of how effectively a material emits thermal radiation and ranges from 0 to 1.

What is Emissivity Correction?

Emissivity correction is the process of adjusting the measured temperature of an object to account for its emissivity, which affects the accuracy of infrared temperature measurements. Emissivity is a property of materials that indicates how efficiently they emit infrared energy compared to a perfect black body. A perfect black body has an emissivity of 1, meaning it emits 100% of the infrared energy it is capable of emitting. Real-world materials have emissivities less than 1, which must be accounted for to obtain accurate temperature readings.

How to Calculate True Temperature with Emissivity Correction?

The following steps outline how to calculate the true temperature using emissivity correction.

  1. First, determine the measured temperature (MT) of the object in degrees Celsius.
  2. Next, determine the emissivity (ε) of the material, which should be a value between 0 and 1.
  3. Use the formula TT = MT / ε to calculate the true temperature (TT).
  4. Finally, enter the measured temperature and emissivity into the calculator to get the true temperature.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem :

Use the following variables as an example problem to test your knowledge.

measured temperature (MT) = 150°C

emissivity (ε) = 0.95