Pyrometer world leader in precision temperature sensors, temperature measurement infrared thermometers, thermocouple thermometers and process automation equipment.
While the technology to make non contact temperature measurements has been around for over 100 years, companies still struggle with the guess-a-mating the correct emissivity to make accurate temperature measurements. Today there is PYROLASER®, PYROFIBER®, OPTITHERM® III. While the technology to make non contact temperature measurements has been around for over 100 years, companies still struggle with the guess-a-mating the correct emissivity to make accurate temperature measurements. Today there is PYROLASER®, PYROFIBER®, OPTITHERM® III. Emissivity errors impact infrared temperature measurement accuracy. Use the ePyroCal emissivity calculator shows just how large these errors can be.

While the technology to make non contact infrared temperature measurements has been around for over 100 years, companies still struggle with the guess-a-mating the correct emissivity to make accurate temperature measurements.  Some use a nominal value based on published emissivity data that is close to their application, others try to use operating experience and some make a continual science project out of it.  In any event, most just set the emissivity to a fixed value and forget it.
 

Eliminate this problem by automatically measuring emissivity and temperature
with PYROLASER®, PYROFIBER®, OPTITHERM® III







Pyrometer's ePyroCal Emissivity Calculator, just how large are emissivity errors in temperature measurements.
Use the ePyroCal emissivity Calculator to determine just how emissivity errors can impact infrared temperature measurements.


To accurately measure the True Temperature you must know the target material emissivity which corresponds to the measure radiant temperature. The true material emissivity value is continual changing property (dynamic) based upon many material and application factors during the heat cycle. As with temperature, emissivity is very much dependent upon the wavelength. In order to make an accurate temperature measurement all instrument parameters must be known (wavelength and bandwidth). Very few materials and applications have a fixed emissivity.

Some factors that influence the changing material emissivity 5%, 10%, 15% or 20% are:

• Changing applications materials (each material has own emissivity)
• Material physical surface property (size, shape, roughness, condition)
• Change in surface crystallization
• Surface composition or coatings
• Change in or rate of temperature change
• Operating environment causing varying degrees of oxidation
• Thin film layers being applied to the material

Use the ePyroCal to realize your temperature measurement errors.

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