: I believe that Peter Charlie's device was measuring in
: microsieverts (µSv/h) . . .

: Here is some information, from where I found the chart --
: http://www.gavinshoebridge.com/news/basic-guide-to-radiation-levels-in-%C2%B5svh-and-msvh/

:

Radiation levels can be a very complicated thing to figure out,
: with alpha, beta, and gamma rays to understand. I won’t go
: into details, or you’ll have 10 pages of reading to do, so
: I’ll just post a chart of what levels of radiation are safe to
: live in - and when it’s time to start running!

: So, here’s a simple, plain-English chart of radiation doses in
: millisieverts (mSv/h) and microsieverts (µSv/h) per hour. Most
: dosimeters (the handheld Geiger counters that measure your
: body’s “Dose”) operate in these units.

: It’s quite a simplified chart, and it helps to know that
: radiation gets more dangerous, the more your body gets. If you
: get a big amount of radiation in an hour, it’s more hazardous
: than getting the same amount over an entire year. This chart is
: measured in an hourly dose, just like what your meter will
: probably show on the screen.

: More to follow on this subject.

: Jeff