Economically and accurately demonstrates the coefficient of thermal expansion of different metals with an easy to read scale. This apparatus contains 3 removable rods (aluminum, brass & iron), each measuring 8" / 20cm in length. When heated by the included triple wick burner, the metals will expand at different rates as demonstrated by the pointers to which they are attached. The rods can be removed and re-positioned on different pointers. This apparatus is easy to adjust and quick to zero.

Requires common lamp oil for operation (not included)
Dimensions : 10" x 4" x 6" / 25cm x 10cm x 15cm
Weight: 2 lbs.