this post was submitted on 01 Feb 2026
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This costs “less than $70”.
You can get a cheap Geiger counter for $50 today and it’s about the same size. I see some for $30-40. These are based on old, proven technology, not some new thing with new unknown problems and an app.
Not that it isn’t neat, but it’s kind of a solved problem.
A 10Gy exposure is well, well beyond hair loss range and into the fatal within days zone. The LD50 is 5Gy, LD99 is 9Gy IIRC. Methinks the author did not do their research on the topic.
Could probably make it way cheaper than $70, and might be easier to source and distribute the EBT4 film in an emergency than geiger counters.
Well, technically the hair loss is permanent if you die afterwards.
Yes, but a cheap Geiger counter doesn't use AI. Get with the times.
What’s LD50 and LD99?
Other comment is wrong. LD50 = 50% chance of dying. LD99 = 99% chance of dying. The figures I listed are for humans, not mice. LD50 in mice is likely drastically different than LD50 in humans.
~~We test on animals. Mice specifically, so we take the amount that killed the mouse and multiply by 50 to get an estimate on the Lethal Dose for humans. So i guess depending on the human the true lethal dose is going to be some where between 50 times the Lethal Dose and 99 times the Lethal Dose.
So "LD" is the amount it took to kill a mouse and 50 times that or "LD50" is the estimated lethal dose for a human~~
Wow i am massivly wrong. A simple wiki search would have set me straight. Sorry all, dont listen to me.
Incorrect. LD50 is lethal dose to kill on average 50% of the time. LD99 is the dose that kills 99% of people. The figures I listed are for humans. There’s no way to extrapolate LD50 from other species to humans. There is enough data on humans radiation exposure to directly calculate LD50.