A compound bar is a visual demonstration of thermal expansion. It consists of a bimetal strip mounted in an insulating handle. Because of the unequal expansion of the two different metals, the bar will bend when heated, which illustrates the operation of a thermostat. Instructions included.
WARNING: This product can expose you to chemicals including lead, nickel, and styrene, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.