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Radiation Detection Wrist Watch
luigi writes "I4U has this story: vigiWATCH is a newly created swiss company that offers the smallest, most precise radiation detector worldwide in a normal size wrist watch.
The watch displays current radioactivity rates from 0.00001mSv/h to 4.00000 mSv/h and cumulative radioactive dose from 0.001mSv/h to 9999 mSv/h. The precision is +/- 25% over total range.
Besides the radioactivity detection, its also showing the time in a digital and analog display. The watch looks like a normal casual wrist watch. Hope this watch never becomes standard equipment for survival on this planet.
The watch is sold on the site for $1100."
when you would rather just not know... Like just how many rads that 19" monitor is blasting into your little soldiers...
I've got nothing...
Tournament Management Online &
To replace my wrist mounted poison gas sensing canary.
====
Crudely Drawn Games
These might be useful for the UN weapons inspectors currently in Iraq. They could keep track of radiation without alerting any Iraqi authorities and get a true feel of whether there are weapons of mass destruction (specifically nuclear weapons) around.
US businesses that currently accept chip and PIN/signature
Me thinks that if current rates are in mSv/h, then cumulative doses should drop the temporal dimension, ie, mSv (no /h)!
-- Samir Gupta, Ph. D. Head, New Technology Research Group, Nintendo Co. Ltd., Kyoto, Japan.
Nope. Those are _MICRO_Sieverts, not millisieverts. That's 0.0001 mSv/hr. You'll still see it on that watch, supposedly.
:)
However, if memory serves me, the average north american feels between 360 and 640 millerem annually (depending on whether or not you smoke). A rem is 0.01 Sievert, so 360 millirem = 3.6 mSv. There are about 8760 hours / year, which gives about 0.0004 mSv/hr. (Did I screw anything up there?)
However, the most important thing in my mind is that the wearer of the watch will become very aware of just how pervasive and natural a small amount of radiation really is. Maybe if everyone wore one, we wouldn't have the misinformed paranoia that accompanies the word "radioactive"
In any field, find the strangest thing and then explore it. -John Archibald Wheeler
*beep, beep, beep*
Guess it's time for my....HOLY SHIT!
I'm at the cap, I'll give you some, just don't post misinformation.
Professional dosimeters have an average accuracy of +/- 10%.
25% is not considered bad, especially as these are not meant to be used for inspections. From the website:
Our aim is to help various professionals measure and control the radiation dosis they may be exposed to in a convenient, discreet and continuous way. These professionals can be radiologists, dentists, medical staff, nuclear power plant staff, waste professionals, military, customs and for those who want to know!
For uses such as these, +/-25% is definately accurate enough.
You could have gotten free karma much easier if you posted that their technical page contained the following: * all data may be subject to change without notice
Now THAT is a reason for worry.
Here are some US Government produced specifications for making a geiger counter from materials found around the house.
www.bannination.com Two things float to the top he
Too bad thats not how radiation works. If you ever were near a large source of radiation your own clothes would absorb radiation and keep it coming to your body. One of the most important parts of a nuclear fallout shelter is the entrance room where you take off ALL clothing and shower. Your clothes and aything else you wear if you were near a nuclear explosion would continue the damage if not taken off immediatly.
unzip; strip; touch; finger; mount; fsck; more; yes; unmount; sleep
This would have been nice to know about before Christmas...
Very cool. One feature I'd like to see in the next version of this watch is some sort of hook-up to a computer that would let you record good data on long-term exposure. Still, I want one of these.
As far as measuring your total dosage goes, I might as well take this opportunity to inform everyone that government mandated radiation standards are mostly erroneous. By orders of magnitude even. We now know that low-level radiation is simply far less harmful (and far better understood) than we thought it was in the 1950's. Major reason is that the 1950's model is simply a straight line extrapolation from the known lethal dosage. Back then, that was a reasonable guess considering the knowledge of genetics at the time. Needless to say, our current understanding is quite different.
5-25 rad: No observable effects.
25-75 rad: Chromosomal aberrations and temporary depression of white blood cell levels in some individuals. No externally observable effects.
75-200 rad: Vomiting in 5 to 50% of exposed individuals within a few hours. Fatigue and loss of appetite. Moderate blood changes. Recovery within a few weeks.
200-600 rad: For doses over 300 rem, all exposed individuals will exhibit vomiting within 2 hours and loss of hair after 2 weeks. Severe blood changes with hemorrhage and increased susceptibility to infection, particularly at higher doses. Recovery from 1 to 12 months for individuals at the lower end of the dose range; only 20 percent survive at the upper end of the range.
600-1000 rad: Vomiting within 1 hour, sever blood changes, hemorrhage, infection, and loss of hair. From 80 to 100% of exposed individuals will succumb within 2 months; those who survive will be convalescent over a long period.
Introduction to Nuclear Engineering (Lamarshe)
... the green, glow in the dark watch-hands causing the +/-25%?
One of the most important parts of a nuclear fallout shelter is the entrance room where you take off ALL clothing and shower.
Leading to the popular Cold War pickup line "Hey, baby, want to see my fallout shelter?"
May we never see th
You said: " Too bad thats not how radiation works. If you ever were near a large source of radiation your own clothes would absorb radiation and keep it coming to your body. One of the most important parts of a nuclear fallout shelter is the entrance room where you take off ALL clothing and shower. Your clothes and aything else you wear if you were near a nuclear explosion would continue the damage if not taken off immediatly.
Your description of radiation and contamination is a little hairy, let me clean it up:
Radiation is the propogation of energy over a distance via waves. Some types of radiation are (using the example of a nuclear bomb): neutrons (very hazardous--you need to be in a deep fallout shelter or surrounded by a significant amount of water to protect you), alphas (very hazardous--are shielded by your skin, but if they are emitted inside your lungs you are in trouble), betas (minor hazard--shielded by your clothing, not a real problem unless ingested or inhaled), EM radiation in general (the frequency; therefore, the energy of the photon is of prime concern: a radio wave will probably not hurt you but a high energy gamma will--shielded by being in a fallout shelter as long as its deep enough), and non-interacting (like neutrinos--you don't have to worry about these, they can't hurt you). This watch will detect gammas and maybe some other high energy EM radiation (neutrons require larger detection devices, and alphas and betas would be shielded by the metal of the watch). I doubt it can detect as low energy as x-rays, but it might.
Contamination is getting radioactive material on you. This radioactive material will undergo decays producing radiation. You take your clothes off and shower to remove the contamination so you don't get irradiated.
Radiation (with the exception of neutrons and alphas) does not beget long term radiation (longer than for example a gamma to be absorbed by an atom and re-emit a lower energy gamma). Its just absorbed and thats the end of it. Neutrons and alphas will typically not beget long term radiation because of the specialized conditions required (causing fission of an atom and releasing radioactive products or being absorbed and transmuting an atom into a radioactive isotope). The contamination on your skin and clothes will be due to fallout (i.e. radioactive material) from the nuclear weapon, not the radiation.
Suddenly, the hairy finger of a familiar monkey tapped me on the shoulder. It was time.--G. T.
Unless this is recent, this is just wrong. People are allowed to own Geiger Counters. Why wouldn't they be?
Maplin used to sell a kit until a few years ago to make one. Second hand militaty units are available on many sites. Scientific suppliers often carry them.
Also, a dosimeter is a different device to a Geiger counter. Is the watch still illegal?
I should imagine that if this were like anything else, then dealers would get in a lot more trouble than the buyer, and I have never heard of that happening.