When a DC current passes through a thermoelectric cooling module, heat is pumped from one side to the other by semiconductor crystals. No liquids or gases are used, giving safe, reliable and efficient refrigeration. Heat generation or absorption rates are proportional to the magnitude of the current and also the temperature of the junction.

Practical Peltier effect heat pump consists of many such junctions connected electrically in series and thermally in parallel.

The equipment is designed to demonstrate/study the Generating effect, Seeback effect and Peltier effect.