Engineers at University of California have created a sensor for detecting counterfeit medications, based on a mbira, a 3,000 year old African musical instrument. The sensor replaces the mbira's traditional metal prongs with a length of bent mental tubing. When a liquid is injected into the tubing it changes the frequency made by the instrument. This change in frequency is a measurement of the liquids density. The team hopes that the sensor could help pharmacists in the developing world identify harmful counterfeit medications which are prevalent in those regions. Learn more about the sensor for detecting counterfeit medications at University of California.