CassetteMaster | Some Interesting Smoke Detectors -- Ionization with Radioactive Material @CassetteMaster | Uploaded 5 years ago | Updated 34 seconds ago
Here are some old Pyrotronics smoke detector modules from I believe the 1970s. These units contain radioactive material, Americium 241, 0.8µCi. I believe these old detectors must be rare.
These were found in an old abandoned (Simplex) fire alarm panel in the basement of a building. One of them I got working, and successfully detected smoke.
Although it is a common requirement to replace smoke detectors every 10 years, it is quite something to see one of these detectors still work after about 40 years of time.
"Where there's smoke, they pinch back!" -- Mario
"Only *you* can prevent forest fires." -- Smokey the Bear
Here are some old Pyrotronics smoke detector modules from I believe the 1970s. These units contain radioactive material, Americium 241, 0.8µCi. I believe these old detectors must be rare.
These were found in an old abandoned (Simplex) fire alarm panel in the basement of a building. One of them I got working, and successfully detected smoke.
Although it is a common requirement to replace smoke detectors every 10 years, it is quite something to see one of these detectors still work after about 40 years of time.
"Where there's smoke, they pinch back!" -- Mario
"Only *you* can prevent forest fires." -- Smokey the Bear
