[segfaultbuserr]

Apparently wristwatch-sized detectors also exist, and there was a case in Czech Republic that an walking-by engineer accidentally found a missing radiation source in the wild using his watch, it was buried in a playground [0], unbelievable!

[0] https://english.radio.cz/passerby-stumbles-upon-radioactive-...

[mietek]

Fascinating story. The detector used in this case appears to be a Polimaster PM1208.

Photo source:

https://www.idnes.cz/zpravy/domaci/zvysenou-radiaci-v-praze-...

Manufacturer page:

https://www.pce-instruments.com/english/measuring-instrument...