This "5G protection" card was part of my big Aliexpress danger haul, but got misplaced somewhere. I recently found it (was the source of a mystery elevated background reading for a few months!!) and had the time to measure a few things.
The first thing I noticed was how badly the inside of the silver foil bag that it came in smelled, it was like an intensely farty, musty acidic odour. Lead acetate came back negative for sulphur compounds so I'm not sure what is causing that awful smell.
The small black pouch is a tiny bit contaminated, barely above background counts per minute (79-83cpm). The bad-smelling silver foil bag is also measuring a similar elevated background reading but is more like 89-120cpm and quite erratic. Putting the blue printed card right under my counter makes it spike all the way to 900cpm but it drops to hover around 750-790cpm. The rubber strap is a bit more worrying in terms of contamination. There's no reason for the strap to be reading 400+cpm, except for it being composed of a thorium-sillicon material which is extremely hazardous because it can scatter dust easily when flexed!
