SkyFox Labs™, skyfoxlabs.com, Prague, Czech Republic
Radium-226 Radioactive Paint on vintage Airborne Altimeter sensed using Ukrainian BELLA Geiger Counter Dosimeter. Video shows how 40 uSv/h!!! (not a typo) is achieved very easily with this Radium-226 irradiator in close proximity to the Altimeter. 40 uSv/h is the piDOSE-DCD Alarm limit (2x average ISS dose rate).
Maimum Doserate of BELLA Geiger Counter is 99.99 uSv/h. Chernobyl Area Full Body Average is ~2.5-4 uSv/h.