GGReg20_V3 Geiger counter module: examples of interesting projects

"GGreg20_V3 is an inexpensive and useful device for checking the “purity” of: mushrooms, berries, vegetables, firewood, etc."

I suppose that might be true, in a sense, if you live in the exclusion zone around Chernobyl.

Otherwise, the statement is absolute nonsense.

The SBM-20 (the cheap Russian Geiger-Muller tube used in the project) is not going to pick up anything from those sources. It's not sensitive to alpha, and not very sensitive in general.

Or some might like to grow crystals, put them in tubes, and count flashes with different energy levels.

* https://optics.org/products/P000023046

* https://en.wikipedia.org/wiki/Scintillator

* https://en.wikipedia.org/wiki/Gamma_spectroscopy