PIRA Classification: 4A30.11
Description: A bimetal strip is made part of a single pole, double throw switch. When cool, one bulb will light. When heated with a torch, the strip will curl, causing the first light to switch off and turning on the second.
Special Instructions: Don't bring the torch too close to the apparatus. The strip only needs a second or two to heat up.
Condition: Good
Setup time: 1 minute
Safety Issues: Be careful of the burner.