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What if the emission rate is unknown when using the infrared thermometer?

As we all know, it’s important to adjust the emission rate when using the infrared thermometer, but how can we know the emission rate of the target object? The recognized emission rates of materials including metal and non-metal materials can be searched on line typically, there are two methods for reference if corresponding emission rate is not found out:

1. Apply black adhesive on the measured object to change the emission rate of the target to 0.95.
2. Measure temperature through contact-type thermometer, and then adjust the emission rate of infrared thermometer so as to make it consistent with the reading of contact-type thermometer, by doing so, the emission rate of target object can be obtained.

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