The SawStop saw can sense a slight electrical current that human fingers (and hot dogs) create. When it senses the current, the saw triggers a safety brake, which stops the blade in less than 5/1,000th of a second. Courtesy of SawStop hide caption

toggle caption Courtesy of SawStop
Sharp Edge: One Man's Quest To Improve Saw Safety
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Making the Case for a Safer Table Saw
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Table-Saw Technology Aims to Save Fingers
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