a coaxial - drive centrifuge provides for contactless regulation of sample temperature . the sample is contained in a multi - station chemical - processing circuit that has a metal receptor at each station . on demand , a stationary inductor induces eddy currents in the receptor as it spins by . dissipation of the eddy current heats the receptor and the surrounding sample . the receptor has a thermal sensor that provides an optical indication of the sample temperature . a stationary contactless reader reads the optical indication . a controller activates the inductor when the reading indicates an actual temperature below a predetermined target temperature . when heating is required , the inductor is pulsed as the receptor is aligned with a gap in the inductor . the chemical - processing circuit is designed for a specific series of chemical reactions , in this case , a polymerase chain reaction is implement as an iterated series of three steps . to this end , the chemical - processing circuit has three stations arranged in a closed loop with interconnecting channels . when a treatment is completed , the chemical - processing circuit tilts so that the sample to the next station for the next treatment . each station has its own receptor and thermo - sensor so that each treatment can be performed at its respective optimal temperature . the centrifuge system thus provides for automating a sequence of chemical processes using contactless regulation of temperature .