New Sensor Could ‘Smell’ Milk To Detect Contamination

Sensor to ‘smell’ if milk has gone bad developed; an advance that could make expiration dates a thing of the past.

Scientists have developed a sensor that can 'smell' if milk has gone bad, an advance that could make expiration dates on cartons a thing of the past.

The sensor consists of chemically coated nanoparticles that react to the gas produced by milk and the bacterial growth that indicates spoilage, said Shyam Sablani, professor at Washington State University in the US.