Which product design innovation revolutionized DNA analysis by enabling the polymerase chain reaction (PCR) technique to be performed automatically?

The intersection of science and product design has led to revolutionary innovations that have changed our lives. Behind many everyday scientific tools and devices lie fascinating design decisions, unexpected challenges, and brilliant solutions. This trivia question focuses on a groundbreaking product design in scientific equipment that transformed research capabilities. Test your knowledge of how scientific product design has evolved to meet the demands of modern research.

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The thermal cycler (PCR machine), designed by Kary Mullis and his team at Cetus Corporation
The scanning electron microscope, developed by IBM's research division
The DNA sequencer designed by Frederick Sanger at Cambridge University
The microarray chip technology created by Affymetrix in the 1990s