SMRTR Science & EngineeringDec 3, 2025Interesting Engineering

New sensor uses microneedles to confirm fish freshness in just two minutes

SMRTR summary

Researchers developed a portable sensor that uses microneedles and enzymes to detect fish freshness in just two minutes by measuring hypoxanthine levels, a chemical marker that rises as fish decompose. The device provides accurate results matching lab equipment and could replace unreliable visual and smell tests for seafood quality assessment.

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