@robertgawron

Device for quantitative analyze energy spectra of gamma-ray sources. Allows to study what radioactive isotopes in what quantities are present in measured sample.

Nuclear radiation sensor with ionization chamber as a detector. Hard to make, IMHO inferior to semiconductor detectors.

Nuclear radiation sensor with photodiode as a detector. Photodiode doesn't require high voltages as GM tubes do. Smaller size makes better resolution. Side effect is electronic must be more sensitive.

Temperature, humidity, and air pressure monitoring with an easy-to-solder Raspberry Pi shield.