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This open hardware project is a mobile low-cost detector for measuring ionising radiation like electrons from beta radiation (plus some gamma photons). It's an educational tool and citizen science device made for exploring natural and synthetic sources of radioactivity such as stones, airborne radon, potassium-rich salt or food and every-day objects (Uranium glass, old Radium watches etc.).
The other alpha-spectrometer variant of this project can measure the energy spectrum of alpha particles but is more difficult to operate. Both versions of the DIY Particle Detector are using the same circuit board with different sets of components.
Please refer to the main project description for further details.