ISOBudgets Emissivity Uncertainty Calculator for IR Temperature
Do you perform infrared temperature measurements or calibrations with a black body calibrator or an IR thermometer?
If you do, then you need to take emissivity uncertainty into account in your uncertainty budgets.
ISO/IEC 17025 accredited laboratories (especially calibration laboratories) are getting deficiencies during their assessments for not including emissivity uncertainty in their uncertainty budgets. However, many laboratories, assessors, and consultants do not know how to calculate this which doesn’t help accredited labs.
It is problem that is leaving laboratories stuck wondering how to solve the problem and make their accreditation bodies happy. So much so, that we saw a large increase in the number of deficiencies cited in 2022. It was on our Top 10 List of Deficiencies related to Estimating Uncertainty.
The good news is you can find the answer to calculating emissivity uncertainty in the following documents:
- BIPM CCT-WG5 Paper – Calibration of Radiation Thermometers below the Silver Point
- ASTM E2758 – Selection and use of Wideband, Low Temperature Infrared Thermometers
- ASTM E2847 – Calibration and Accuracy Verification of Wideband Infrared Thermometers
- Fluke Application Note – Emissivity Compensation for Fluke Calibration 4180 Series Precision Infrared Calibrators
The bad news is the information is not easy to follow for the average person. So, we created a step-by-step guide to help you calculate emissivity uncertainty. It is available on our blog using the link below.
- How to Calculate Emissivity Uncertainty for IR Temperature Measurements by ISOBudgets
But, if you do not want to make your own calculator, then you can use our emissivity uncertainty calculator.
It’s only $29 and will easily calculate the uncertainty related to emissivity for you (so you don’t have to).
The calculator includes two calculators:
- Single Temperature Emissivity Calculator
- Multi Temperature Emissivity Calculator
Single Temperature Emissivity Calculator
The single emissivity uncertainty calculator estimates the emissivity uncertainty for a single temperature value. Simply enter the temperature you are measuring, the ambient temperature, the emissivity of the object being measured, and the emissivity of the IR thermometer and it will calculate your emissivity compensation or uncertainty.
Multi Temperature Emissivity Calculator
The multi emissivity uncertainty calculator estimates the emissivity uncertainty for several temperature values and creates a table with emissivity vs temperature. So, you can enter your information once and get an instant table to cover the emissivity uncertainty associated with your entire temperature range (-50 to 1000°C). This is a feature that is extremely helpful.
In addition to estimating uncertainty due to emissivity, it can be used to calculate emissivity compensation so you can correct your IR temperature measurements and reduce your measurement uncertainty.
If you perform IR temperature measurements, you need this calculator.
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