Heat Comparison Thermometers (Pair) is an accessory for Genecon V3 which converts the electrical energy from the hand generator to heat.

The heat generated is shown as a temperature reading and a colour change on a liquid-crystal thermometer. Liquid-crystal thermometers use liquid crystals that change colour in response to temperature changes. Mixtures of liquid crystals are enclosed in seven separate partitions; numbers on the partitions indicate temperatures according to the amount of heat present (from 30 to 60°C).