What is this sensor?

  1. Sorry I don't have a picture right now. But this has had me wondering and I can't find anything online about it. In my college in all the bathrooms and laundry rooms I see these sensors in the ceiling which is just a 6" metal rod hanging. There are your regular smoke detectors and everything on the ceiling and then there are these things and I don't know what in the world they do. It just looks like your regular smoke detector frame with nothing but a metal rod hanging down.
     
  2. jcsd
  3. berkeman

    Staff: Mentor

    It's a hydrogen sulfide detector. If levels get too high near the ceiling, the fire sprinklers activate. You are forewarned...
     
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