The thermal conductivity set comprises four metal bars held firmly together in parallel with a plastic rigid carrier.
The metals are copper, aluminium, brass and steel.
Each bar has a Liquid Crystal temperature sensitive strip attached and its conductivity value marked on the back of the carrier. The liquid crystal strips have 8 boxes and change to a green colour at about 40C.
What the Colours Show
The thermochromic Liquid Crystal used in Conductivity Bars shows temperatures in the range 35C to 45C. The lowest temperature indication is a coppery red colour at 33C and the hottest is a blue colour at over 45C. The 35C to 45C appears in green.