Galileo Galilei Thermometers

Galileo Galilei (1564-1642) was an important Italian scientist who founded modern physics with its reliance on experience and experiment. Among countless discoveries of natural laws, he succeeded in developing a thermometer based on the law of physics, which states that the specific gravity of liquids changes as they expand at different temperatures. This principle has been used in the Galileo Thermometer. As the temperature rises, the liquid expands. Its specific gravity decreases and the spheres sink. The lowest floating sphere in the upper part of the cylinder indicates the current temperature. The manufacturing of the Galileo Thermometer is extremely complex and done mostly by hand. Each ball is calibrated to achieve an accuracy of 1/2°F. They differ in weight by only two thousandths of a gram. The temperature is indicated on stainless steel medallions. The liquid within is environmentally safe, biodegradable and ozone friendly.

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