As the temperature of the water rises or falls, the liquid will either expand or contract, respectively, varying the density in the process as well. We are currently unable to deliver to EU addresses due to the high and unpredictable costs, customs charges, and courier handling fees. For example, many have a range of 60 °F (16 °C) to 100 °F (38 °C) and won't tell you the temperature if it's higher or lower than those values.

Although Johan Wolfgang von Goethe is sometimes credited with its invention, one was found in his bedroom after his death, there is evidence that the Moors used similar instruments during the 8th century. Although its density is less than water, it varies depending on the temperature, even more so than water.To enable personalised advertising (like interest-based ads), we may share your data with our marketing and advertising partners using cookies and other technologies. The individual floats rise or fall in proportion to their respective density and the density of the surrounding liquid as the temperature changes. The Galileo thermometer works because of the principle of buoyancy, which states that objects that are denser than their surroundings sink, and objects that are less dense than their surroundings float. Full a big beaker with water that’s either colder or warmer than the ambient temperature of the room.

Includes a STORM BOTTLE TYPE INDICATOR so you can see changes in barometric pressure - useful for forecasting the weather. Sometimes a cluster of spheres floats by the top of the tube, and a cluster sinks to the bottom, while one sphere hangs in the middle. You can tell the temperature by reading the medallion on the middle floating sphere, if there are clusters of spheres at the top and the bottom of the tube, or with a few other tricks, depending on the configuration of the spheres. The carefully weighted glass globes in this Galileo barometer are suspended in a liquid-filled tube, where they sedately sink or float as the surrounding air gets cooler or warmer.These glass galileo thermometer with barometer can be placed where it is needed, to monitor the temperature of the weather, water, or other areas. This temperature thermometer will make a fantastic novelty gift for a loved one or the most perfect housewarming gift and will also look great as a desk gadget.

The clear liquid in which the bulbs are submerged is not water, but some organic compounds (such as ethanol or kerosene) the density of which varies with temperature more than water does. The Galileo thermometer, invented by astronomer Galileo Galilei, works mainly on the buoyancy principle. The ratings/reviews displayed here may not be representative of every listing on this page, or of every review for these listings. She has presented at the American Association of Chemistry Teachers (AATC) and was an Adjunct General Chemistry Instructor at Northeast Wisconsin Technical College.The thermometer is a straightforward, fairly reliable thermometer, but today is seen more as a talking point and is mainly used for decoration and general observations. Based on a thermoscope created by Galileo Galilei in very early 1600s, the Galileo thermometer was not invented by him, but rather named after him by the group of academics that invented it.