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It always makes that sound (sh.itjust.works)

submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/comedyheaven

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[–] [email protected] 3 points 2 months ago* (last edited 2 months ago) (1 children)

Not if it is a photoelectric smoke detector, which is the only type you should have unless you got a good reason for ionisation smoke detector.

~~The blinking is the smoke detector checking for smoke particles.~~

[–] [email protected] 10 points 2 months ago (1 children)

photoelectric detectors use infrared LEDs. and they are inside the detector, shielded so stray light will not cause any problems.

Any red LED you see on a smoke detector is for statuses, not detecting

[–] [email protected] 4 points 2 months ago (1 children)

Thank you for the correction, you're right. I got it mixed up with the status LED that some/most(?) smoke detectors have that will periodically blink to show that it's active.

Regardless, a smoke alarm blinking red is to be expected, and doesn't mean that it needs to be tested. Most of them will make a loud ping to notify the user that it requires attention, as you can't expect people to notice the blinking LED alone.

[–] [email protected] 1 points 2 months ago (1 children)

it would be nice if there were smoke detectors that didn't have flashing lights during normal operation.

[–] hikaru755 2 points 2 months ago (1 children)

Well, the problem with that is that a completely dead smoke detector does also not blink

[–] [email protected] 1 points 2 months ago

perhaps a steady faint green glow?