Identifying Common Ionic Contaminants on a Touchscreen
Researchers at the University of Cambridge demonstrated a new technique showing how a typical touchscreen could identify unsafe drinking water and more.
The project started with computer simulations that were then validated using a stripped-down, standalone touchscreen similar to those used in phones and tablets. In their experiments, researchers placed different liquids under the screen to measure the change in capacitance and recorded the measurements from each droplet using standard touchscreen testing software. Ions in the fluid interact with the screen’s electrical fields differently, depending on the concentration of ions in their charge.
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