Just don't wear it...
on your arse scratching finger.
Smartwatches and Fitbits might be the cool wearables du jour, but they're hardly able to tell you if you're standing in a cloud of noxious chemicals. However, a team of boffins hopes to some day fill this, er, gap in the market with their hip prototype, the broad goal of which is to help keep you alive. Juliane Sempionatto, …
"Concentrations" in mg and mL, percent (but not in context) and mM (thank heavens, a measure of ... oh, sorry it's not concentration). At no time any indication of the actual detection concentration except it sounds like a face full.
Were these figures actually taken from any kind of journal when scientists write stuff or made up by a bloke producing exceedingly naff costume jewelry for TJC? Did he sell explosive/metal not-detectors to lots of organisations like the British army some years ago?
Well guys, it was a nice idea, but implementation will not be for mass consumption.
Chuck the ring format, make it a pendant. Give it to hazmat workers evolving in unknown conditions, working in 2-hour shifts, and you'll be on to something.
As it is ? I don't think a kleptomaniac would want to be caught dead with that thing.
In any parts of the U.S. that have outlawed photography of environmental hazards on private property and reporting to environmental authorities.
Now that the EPA is being re-purposed, this can only spread. What you don't know, you can't talk about, and what you don't talk about, you can't get arrested and beaten for.
You make sure a lot of people in a crowd, say commuters, are wearing them. Then, in the event of a chemical attack as they start dropping dead you take the readings sent from their rings to model the movement of the threat telling you the likely origin and the direction it is moving and how it is dispersing -- letting you know where to evacuate other people to.
So, it's a ring for human canaries...