Smoke detector

There are two types of photoelectric smoke detector, transmissive, and reflective. You've confused them, perhaps?

James Arthur

Check the fine print on the back of your smoke detector. If it says " Americium-241 or AM-241 " it's radioactive, and constitutes a potential bio-hazard. This radioactive material, which is contained between thin layers of gold and silver foil, can be released into the environment if the detector is tampered with, damaged due to fire, crushed in disposal or incinerated. While the radioactive material inside typical ionization-type smoke detectors is not likely to break free from its container, it nevertheless constitutes a constant very low-level exposure. Continual low-level nuclear irritation may cause a disturbance of life-energy functions over an area larger than classical radiation theory predicts, via the unshieldable oranur effect discovered by Dr. Wilhelm Reich.

The alternative to this potential health hazard is a non-radioactive, photoelectric smoke detector which uses a tiny beam of light to detect smoke particles. Compared with radioactive detectors that rely on ionized air, photoelectric detectors use no atomic-radioactive materials whatsoever. They are additionally less sensitive to humidity and cooking smoke -- which means fewer annoying false alarms, increased sensitivity to larger smoke particles, and faster detection of smoldering fires, the most common and deadly of all household fires.

Check the fine print on the back of your smoke detector. If it says " Americium-241 or AM-241 " it's radioactive, and constitutes a potential bio-hazard. This radioactive material, which is contained between thin layers of gold and silver foil, can be released into the environment if the detector is tampered with, damaged due to fire, crushed in disposal or incinerated. While the radioactive material inside typical ionization-type smoke detectors is not likely to break free from its container, it nevertheless constitutes a constant very low-level exposure. Continual low-level nuclear irritation may cause a disturbance of life-energy functions over an area larger than classical radiation theory predicts, via the unshieldable oranur effect discovered by Dr. Wilhelm Reich.

The alternative to this potential health hazard is a non-radioactive, photoelectric smoke detector which uses a tiny beam of light to detect smoke particles. Compared with radioactive detectors that rely on ionized air, photoelectric detectors use no atomic-radioactive materials whatsoever. They are additionally less sensitive to humidity and cooking smoke -- which means fewer annoying false alarms, increased sensitivity to larger smoke particles, and faster detection of smoldering fires, the most common and deadly of all household fires.

AsianDoll

Since its my school semester break I have been using my free time playing games like

skrev i meddelelsen news: snipped-for-privacy@d10g2000pra.googlegroups.com...

Can one actually poison anyone with the contents (all the ones they sell here are suddently photo-electric)?

"Frithiof Jensen" wrote in message news:492474de$0$56788$ snipped-for-privacy@dtext02.news.tele.dk...

Not without lots of effort to concentrate it. See, e.g.,

Probably on the same order of difficulty as poisoning people by getting them to eat enough apples that the cyanide kills them: Pretty much impossible.

See

According to the EPA:

- There are some potential health risks which can occur from ingestion of AM-241. It's a long-lived radioisotope, and if ingested will expose the tissues containing it to radiation (gamma and alpha) for years. The EPA doesn't mention specific chemical (as opposed to radiation) hazards.

- Most of the AM-241 in the environment comes from nuclear-weapons testing back in the 1950s and 1960s.

- Ionization-type smoke detectors contain a small amount of AM-241. Don't disassemble them, attempt to remove the AM-241 emitter, or burn them in your fireplace.

- The amount of AM-241 in smoke detectors is so small that the NRC exempts individuals purchasing smoke detectors from licensing requirements, including disposal requirements. According to the NRC it's legal to dispose of single household smoke detectors in the trash, without special handing. [Some states have regulations which forbid disposing of any electronic equipment in the trash, including batteries. I don't know whether these regs apply to smoke detectors.]

Americium 241 emits alphas, which unless you swallow it or inject it into your bloodstream, are fairly innocuous - a layer of epidermis stops them.

But, "life-energy"? "unshieldable oranur effect"?

Gimme a break.

Thanks, Rich

Sure! Dissolve some in mercury, and give them an IV. >:->

Cheers! Rich

Commonly called an "ionization detector". It is best at sniffing the particulates that arise from open flames. They are the type more likely to false-alarm due to cooking fumes, hair spray, and such.

These are best for smoldering fires that produce visible smoke. and are orders of magnitude less likely to give a false alarm.

If you want the fastest notification of danger, you by a device that has both an ionization detector and a photoelectric detector.

Alas there is also ionization types. There are also CO detectors. All are used in "smoke detectors", often in combination.