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Automation of reading of liquid-in-glass thermometers

In the proposed paper a possibility of automation of calibration of liquid-in-glass thermometers is discussed. Temperature readings are taken with the use of a measuring system that consists of a standard calibration facility, the video camera and illumination and the personal computer that executes the program for image processing and analysis. Once the reading of the temperature is extracted from the acquired image, this value can be passed to any other data processing, which includes the comparison with the values from the reference thermometer and determination of overall uncertainty. Data achieved in this way can be directly used to prepare the calibration certificate.