This thermometer is based on the natural principle of the change in the density of a liquid depending on the temperature. In this way, when a ball drops to the bottom of the thermometer, it shows us the room temperature. If more than one ball has dropped, then the ball with the highest temperature indication shows us the room temperature.

• Made of glass
• Measurement range: 18-26 °C
• Dimensions: 3.5 cm diameter x 18 cm height.