UV-Monitoring Bracelet Warns You When You've Had Enough Sun

UV-Monitoring Bracelet Warns You When You've Had Enough Sun | @Ecouterre

No need to wait for your skin to blister before you realize it’s time to retreat into the shade. Scientists from the University of Strathclyde have invented an ultraviolet-ray-detecting wristband that changes color with prolonged exposure to the sun. Designed to provide a visual warning that no amount of clock-watching can match, the monitor works through an acid-release agent that gradually breaks down in the presence of UV radiation. The agent, in turn, triggers a pH-sensitive dye, which responds by turning from yellow to pink.

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