How do I make my own acurate thermometer?
You could try to make an accurate experimental thermometer by glueing two strips of dissimilar metals together along their lengths. Perhaps try copper and steel or copper and aluminum or steel and aluminum. Try perhaps one half inch wide by six inch long strips. Use sheets of metal that are equally thin. Perhaps cut the strips from aluminum soda cans and steel soup cans, etc. Use a magnet to check for steel vs aluminum. Glue the strips together using epoxy or super glue. Attach one end of the combined strip to a firm base and leave one end free to move in front of a paper scale. You now have a bimetalic thermometer. The thermometer can be made to be more sensitive by using greater length strips and bending the strips into a spiral and attaching a pointer to the free end of the spiral to amplify movement. This is how most oven thermometers are built except the metals are joined without glue. The principal of operation of a bimetalic thermometer is that one metal expands or contracts mor
