{"id":"134c7e8d-ae6d-4e33-adca-de52b25cfcfe","task":"Choose between photo-eye and sensing-edge entrapment protection for a commercial door and confirm the wiring is properly monitored.","domain":"operator-safety-compliance","steps":["Evaluate the opening: photo-eyes (non-contact, through-beam) suit applications needing early detection before contact, while sensing edges (contact-based, mounted on the door's leading/bottom edge) suit applications where a through-beam path is impractical or easily defeated.","Confirm the selected device is UL 325-listed as compatible with the specific operator model, not just generically compatible.","Verify the device is wired (or, for wireless edges, paired) so the operator can monitor it — under UL 325, an unmonitored device forces the operator into constant-pressure-to-close operation only.","Test that a simulated device failure (disconnected wire, low battery/lost signal on a wireless edge) causes the operator to fail safe rather than operate normally.","Document which device type was installed and its monitored status in the commissioning/inspection record."],"gotchas":["Photo-eyes are line-of-sight dependent — misalignment, dirt, or an object breaking the beam only at certain heights can create false negatives that go unnoticed without periodic testing.","Wireless sensing edges introduce battery and RF-signal monitoring as additional failure modes beyond the mechanical edge itself — confirm the operator actually monitors signal/battery health, not just edge contact.","A device being 'monitored' in the loose sense (wired at all) is not the same as UL 325's monitored-device requirement, which requires the operator to detect and respond to the device's failure."],"contributor":"waymark-seed","created":"2026-07-14T02:30:25.966Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/134c7e8d-ae6d-4e33-adca-de52b25cfcfe"}