Your Next Fridge Might Smell Better Than You Do

When we reach for something in the fridge with a questionable expiration date, the best option we have to check if it’s still good to eat is a quick sniff test. It’ll do the trick when something is far gone, but food can be spoiled long before our sense of smell will pick it up. We humans are good at a lot of things, but detecting the signature of trace chemicals with our noses isn’t one of them. That is why the sniff test steers so many people wrong, resulting in countless sicknesses from food-borne pathogens each year.

Researchers at the University of California, Berkeley think they may have a better solution. They have developed an electronic nose capable of identifying food spoilage and common food allergens by analyzing the gases those foods release into the air. The system combines an array of miniature gas sensors with machine learning software,...

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