Hi, got a box full of 10+ years old, working smoke detectors.. Any ideas how to use them? (No, I don't want to use them as secondary smoke detectors..)
You could use the particle sensor in them to build an air quality measurement unit.
Why do you write "working"? Usually there is no warranty beyond 5 years. Find your local scrap acceptance in the yellow pages...
I agree with @Jacko. Most of the smoke detectors has no warranty beyond 5 years.
I think you need to check out your smoke detector by consulting some professional. You need make sure that they are working with lighting a match and letting the smoke go into the detectors. If it's not working properly, then you should buy a new smoke detector and hire your local electricians to install it. I too had installed new smoke detector by hiring some electricians Havertown PA (https://www.dndenergy.com) where they installed it and performed an effective smoke detector test.
Mike wrote: > Any ideas how to use them? Your question is not clear. Do you want to use them as smoke detectors, or do you want to build something else out of them? You should not use it as smoke detectors any more as the detection unit gets more and more dirty and the sensor is getting blind over the years. As an Idea: use them as a signal horn for a water detector unit, for example to detect water underneath a dish washer or a washing machine.
: Edited by User
What sensor do they use - radioactive or light?