Archive of products sold during the
10 years our high street shop was open
1997 -
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Our Galileo Thermometers came in a large range of sizes and designs.
They quickly became the perfect gift for “the person who has everything”.
GALILEO THERMOMETERS
How Galileo Thermometers Work
The Tube:
A sealed glass cylinder filled with a clear liquid (often an alcohol or hydrocarbon).
The Bulbs:
Inside are several sealed glass bulbs filled with a coloured liquid. Each bulb has a small metal tag hanging from it, stamped with a temperature (e.g. 20°C, 22°C, 24°C). The tag adds precise weight, so each bulb has a slightly different overall density.
Density and Temperature:
The clear liquid in the tube expands as it warms up -
It contracts when cooled -
The bulbs’ density stays constant, but the surrounding liquid density changes.
Floating and Sinking:
When the liquid is more dense than a bulb, that bulb floats.
When the liquid is less dense than a bulb, that bulb sinks.
Bulbs hover at different levels depending on the liquid density, which is linked to the temperature.
How to Read It:
Look for the lowest floating bulb (nearest the middle).
The temperature on its tag indicates the approximate room temperature.
If all bulbs float, the room is cooler than the lowest tag.
If all bulbs sink, the room is warmer than the highest tag.