Engineer Guy: How Smoke Detectors Work Engineer Guy online video shows a smoke detector being reverse-engineered, to demonstrate how the device's radioactive element creates a small current that is broken when smoke passes through it.
Issues & Performance
BC Gov: Smoke Alarms Now Required In All Homes Changes to the BC Fire Code require that every private home and hotel or motel room built before 1979 must have smoke alarms installed by May 1, 2010.