SkyFox Labs™, skyfoxlabs.com/product/16-pidose-dcd, Prague, Czech Republic
Nanosatellite Radiation Alarm for Onboard Space Weather Monitoring, versus Radium-226 Radioactive Paint on vintage Airborne Altimeter. Video shows how 40 uSv/h is achieved very easily with this Radium-226 irradiator in close proximity to the Altimeter.
Evaluation Kit BEEP Select Jumper set to ALARM Output, red LED indicates it as well.
40 uSv/h is the piDOSE-DCD Alarm limit (2x average ISS dose rate).