Thermal cyclers are used to amplify segments of DNA via the polymerase chain reaction (PCR). Also used to facilitate other temperature-sensitive reactions, these PCR machines or DNA amplifier devices can complete restriction enzyme digestion or rapid diagnostics. Each thermal cycle is equipped with high-performance components that ensure the formation of a homogenous tempered air cushion between the samples being combined. These instruments provide excellent temperature uniformity over the entire block and reproducible results regardless of the position of the inserted samples.