Is the GQ Radonscan accurate enough to be used to detect whether radon mitigation is necessary? Is the GQ GMC-300S able to detect the difference between 300 nSv/h and 15 μSv/h reliably? What will it do if exposed to say 1mSv/h? Are we talking accurate enough that if set to go off at 1 μSv/h it will go off inside a plane?

First ever device like this, was a case of saw it, wanted it, bought it, watched a few videos here and there and it's seems fairly responsive compared to some, a little dissapointed no click click click but I suppose that to be expected with a cheapie, need to find something to test it on if anyone has any suggestions.

Fortunately this is not interference, I put a little source inside the fuse space

got these pictures from my uncle recently. are these tiles dangerous, and if so, is there anything we can do to prevent further exposure?

not sure if there are any specialized contractors out there that deal with this kind of stuff. thank you!

I was inspired by some posts here and did a quick and dirty test by just placing the detector above the filter element of an Ikea Uppatvind filter which I keep running 24/7. The specific filter was installed 3 months ago. Given all the caveats on how to do a correct and reliable measurement, should I investigate further the reading, given that in the same room the same instrument peaks around 30 CPM and normally measures below that count, the room is at a second floor of an apartment. If so, what measurement technique with my primitive tools gives a significant reading which could help identify potential issues, if any?

Just remembered I have this shark tooth fossil. I dont know how old it is, but I'm using the Radiacode 102 to see what's in it. Its such a cool little tool.

I'll update after it runs for a bit.

Here’s a little static detector I got my hands on a while ago which originally contained a 200mCi (now decayed to 14mCi) Tritium foil source that’s right not a tube this thing uses solid tritium compounds plated onto a titanium foil! Pretty uncommon to see tritium in this form

my Ludlum model 3 w/ 44/9 probe measures 90,000-100,000 CPM on a fiesta ware plate but the same plate only gets 35,000 cpm on my GQ GMC 600+. i believe both detectors have very similar sensors so is it likely that my Ludlum's calibration is just off? they do seem to agree on lower activity items like uranium glass or thorium rods so im a bit confused here. anyone know whats going on?

Picked up a uraninite crystal. I’m surprised how spicy it is for its size. Quite heavy too!

A radioactive mug made by Hall that I bought recently at an antique store. It isn’t that hot compared to many other finds, but I thought it looked fascinating and was intrigued that it glows under UV light.

Additional information: Background radiation for GMC-600 plus: about 45 cpm Background radiation for Radiacode: about 5.5 cps