Scientists have created a wearable sensor that attaches to your underwear and tracks your gut bacteria in real time by measuring the hydrogen gas in your flatulence. And no, that’s not a setup for a joke.
Researchers at the University of Maryland developed the device to solve a problem that has plagued microbiome research for years: how to actually monitor what gut bacteria are doing hour by hour, not just which species are living in there. The answer, it turns out, involves a tiny sensor clipped near your bottom that passively records data while you go about your day.



Sensors that track gasses are incredibly cheap. I can build a VOC, CO2, PM2-10, CO, Smoke, etc for about $50 from parts on AliExpress. A sensor that tracks just hydrogen should be way less.
Edit:
methaneHydrogenYou have any guides about doing that? My landlord says I have enough ventilation flow, but the only way I can get a good night’s sleep is by having my windows open, even when it’s -10 outside.
It might be cheap to build yourself then but cheap parts have rarely deterred a capitalist.
It’s about $0.99 for a MQ-8 dev board