Photo 2 (IMAGE)

National University of Singapore

Photo 2

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By integrating the NUS team's custom-made pH sensor (middle) and pH sensing algorithm into existing fitness trackers or smartwatches which already have a built-in pulse oximeter, the pH Watch can simultaneously monitor the pH value of a user's sweat, along with heart rate and blood oxygen saturation values in real-time, with about 90 per cent accuracy.

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National University of Singapore

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