Devices and methods for detecting or monitoring the quality of food products

This invention is a smart label for food products. It combines a quick response (QR) code with a pH-sensitive film that changes color when it touches food, indicating its pH and thus its quality. The device includes at least two color standards for comparison, and the film is specifically placed within the central part of the QR code.

Why it matters: Filed before widespread AI image analysis. Smartphone cameras and AI models can now more accurately interpret subtle color changes and apply chemometrical methods for quality assessment.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedpH-sensitive film, custom QR code printing

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