TL;DR
A photo-eye sensor is the individual sending or receiving unit of a garage door's beam-based entrapment protection, wired back to the opener with low-voltage leads. One unit emits an invisible infrared beam and the other confirms it; if the receiver loses the signal during the close cycle, the opener stops and returns the door to the open position.
What it means
A photo-eye sensor is the individual sending or receiving unit of a garage door's beam-based entrapment protection, wired back to the opener with low-voltage leads. One unit emits an invisible infrared beam and the other confirms it; if the receiver loses the signal during the close cycle, the opener stops and returns the door to the open position. Technicians check the LED indicators on each housing first when diagnosing a door that reverses for no visible reason.
Where it sits in the glossary
Photo-eye sensor is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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