The invention of glass thermometers dates back to the 17th century, with scientists like Galileo and Santorio laying the foundation for their development. Early glass thermometers used alcohol as the temperature measurement liquid, which was later replaced by mercury due to its wider temperature range and higher accuracy. With advancements in science and technology, the design and manufacturing processes of glass thermometers have continuously improved, and calibration methods have gradually become standardized.
In modern times, although glass thermometers are gradually being replaced by new devices such as digital thermometers, they still hold an important place in specific fields (such as basic laboratory education and traditional industries). The development of calibration technology has also evolved from manual adjustments to the use of high-precision constant temperature baths and automated calibration equipment, significantly improving calibration efficiency and accuracy.