food spoilage detection

Dr Sivam Krish with the GoMicro Spotcheck App and a phone attachable magnifier.
Can a $1 device that attaches to a mobile phone become a pivotal tool to help solve the $1 trillion food waste problem?
Simple, scalable wireless system uses the RFID tags on billions of products to sense food contamination
A transparent patch will tell you if your food has gone bad
Sensor detects spoilage of food