SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/wood-sawstop-detect

How does SawStop detect that skin has touched the blade?

The blade's electrical signal changes because the body is conductive.

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  1. A camera sees a hand
  2. The blade's electrical signal changes ✔
  3. A heat sensor feels warmth

Why: The blade carries a small electrical signal. Human skin conducts, so touching the blade changes that signal and triggers the brake.

Huh, didn't know that: SawStop warns that lacquer or other coatings on blade teeth are non-conductive and can slow contact detection.

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References

Answer: The blade's electrical signal changes. The blade carries a small electrical signal. Human skin conducts, so touching the blade changes that signal and triggers the brake.

  1. SawStop Technology www.sawstop.com/why-sawstop/the-technology
    When skin contacts the blade, the signal changes because the human body is conductive.
    Checked 2026-10-10.

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