Temperature cycle system

The present invention, PCR, in particular, the real-time PCR, provides a system for implementing a fast speed and high specificity. The system leverages the heating block containing a liquid composition, to the reaction vessel and the reaction vessel, rapidly transfer heat. This system utilizes a reflective liquid metal, the signals from PCR, also be reflected from the top also into the bath. In this way, without removing the signal, the tank from the heating block can be measured in real time by optical assembly.