Vintage Smoke Detector for sale | eBay
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Reverse engineering a big old American smoke detector
2020年3月15日 · These old smoke detectors, just like modern ones with less than 1 uCi of radioisotope, use a reference ionization chamber as the high impedance on top of voltage divider. Cheaper than a many-gigaohm resistor, and it automatically compensates for pressure and temperature and decay of the alpha particle source.
Vintage Smoke Detectors for sale | eBay
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Reverse engineering a big old smoke detector - Fusor Forums
2020年3月14日 · These old smoke detectors, just like modern ones with less than 1 uCi of radioisotope, use a reference ionization chamber as the high impedance on top of voltage divider. Cheaper than a many-gigaohm resistor, and it automatically compensates for pressure and temperature and decay of the alpha particle source.
Vintage Smoke Alarm for sale | eBay
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Smoke Detectors - Bogleheads.org
2023年11月12日 · The standards for smoke detectors recently changed, but it is still legal to sell old smoke detectors that predate the standard. There is a significant risk of getting old stock. Do not replace your smoke detectors with more old smoke detectors.
How long can a smoke detector sit, unused, and still be pristine?
2018年8月29日 · If you’re unsure of the time remaining on your smoke alarm, there’s an easy way to check its viability. Most smoke detectors will feature a manufacturer date printed on the back of the alarm. If it’s more than 10 years old, it’s time to replace the smoke detector. The same applies to carbon monoxide alarms.
F-3 Radium Smoke Detector From The 1960's : r/Radiation
2021年11月20日 · They were made from the 1950's up until 1968 when they were eventually discontinued due to safety concerns. They were replaced with americium-241 dioxide units (the f3/5a, f5a, and f5b models) instead which limited the risk of dust being generated from the "Ionotron" radium foil developed by US Radium Corporation.
Is there a responsible way to dispose of smoke detectors?
2024年5月11日 · I'm just replacing some ~10 year old smoke detectors myself! That's roughly the interval at which they are supposed to be replaced. Check the local regulations where you live. Here, any store that sells the same category of product is legally required to receive those products for recycling.
Vintage Smoke Alarm - Etsy
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