Thermoelectric Coolers have several advantages over alternative cooling technologies. They have no moving parts, so the solid state construction results in high reliability and units can be mounted in any orientation. Thermoelectric coolers are able to heat and cool by simply reversing the polarity, which changes the direction of heat transfer. This allows temperature control to be very precise, where up to ±0.01°C can be maintained under steady-state conditions. Their lightweight and compact form factor make them ideal for applications where size is limited. In addition, thermoelectric coolers have minimal electrical noise and are environmentally friendly because they use no CFC’s.