Non-contact temperature measurement is an optical measurement based on the property of all materials to send out electromagnetic radiation (infrared radiation). The infrared thermometer detects this radiation to determine the temperature. Proper calibration using a blackbody is essential for getting accurate temperature readings.
Temperature Uncertainty (Accuracy)
All LumaSense blackbodies are standardized to heat up within 0.25% of the set temperature. The time it takes to reach the set temperature varies by model.
Depending on the situation, calibrations might take anywhere from an hour up to an entire day, so once the set temperature is reached, it needs to remain constant throughout the entire calibration. The stability of each LumaSense blackbody is guaranteed.
In some situations, multiple instruments may be calibrated consecutively using the same blackbody. With LumaSense blackbodies, the temperature of the heated flat plate or cavity will be even across the entire exit port for consistent readings every time you calibrate an instrument.
Exit Port Diameter
When calibrating a pyrometer, there can be internal reflections, so the exit port of the blackbody needs to be at least 1.5 times larger than the pyrometer’s spot size to achieve accurate readings. Know the focus distance and spot size of your pyrometer so you can calculate the necessary blackbody exit port size.
Depending on how and where calibrations will be done, you may need to consider additional factors such as power requirements, size, weight, etc. when selecting your LumaSense blackbody.
All LumaSense blackbodies are calibrated according to NIST standards (PTB standards in Germany).