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How to make a thermometer?

How do you make a thermometer?

  • i have to help my sister make one for a school project (8th grade). it should be pretty simple, but work well. thanks!

  • Answer:

    To make a liquid thermometer, theoretically, any liquid sealed in a see-through column will work. The tricky part is sealing the column. If you can get a very narrow column of glass or clear plastic (diameter the width of a pin, the narrower the better it works), and some alcohol with food colour dye in it, you should be able to build a thermometer that works okay. It won't be too accurate, but the column will rise and fall with the temperature, as it's supposed to. Seal the end of the column with glue or something. You can email me if you need any more help with it. I really enjoy making things like that.

Lina at Yahoo! Answers Visit the source

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The old professor says: There are several types of thermometers and they are often used for different purposes. The easiest one to make is the thermocouple. Take about 8 inches of copper wire and twist one end of it to about an 8 inch length of nickel wire. Attach the other ends of the wires to a galvanometer. When you put a flame under the twisted ends, the galvanometer will indicate a current. The hotter the flame, the more current. These thermometers are used to determine the heat in your automobile engine. A bi-metallic strip is also easy to make. Take a six inch ribbon of copper and rivet it to a similar ribbon of iron or nickel. When you heat it, the bi-metallic strip will curve due to the different index of expansion for each metall. Attach a needle to one end of the strip and a nearby index card with a scale on it. Wish I had graphics to help. Hope you get the idea. There are many other devices that could be made. Infra-red sensors are also easy to make. Take a light meter, put an IR filter in front of it. Change the photometer scale to read degrees after standardizing it.

Bruce D

Just use liquid mercury and put it within a tube but I dont know where you will obtain liquid mercury though.

E=mc2

First you need to find a therm. Once you have obtained a suitable therm put it in a glass tube and attach a meter to the whole works. Good luck. I haven't seen any therms for a while.

lester b

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