invention of the thermometer

The invention of the thermometer evolved over centuries, starting with early devices like Galileo’s thermoscope in the late 16th century, which could show temperature changes but not measure them precisely. In the early 18th century, Daniel Gabriel Fahrenheit developed the first reliable mercury thermometer with a standardized scale, allowing for accurate and consistent temperature measurement. Later, in the 19th century, Celsius introduced his scale, improving scientific precision. These innovations transformed how we monitor temperature, making thermometers essential tools in medicine, science, and industry.