Researchers have created a unique wristwatch that contains multiple modules, including a sensor array, a microfluidic chip, signal processing, and a data display system to monitor chemicals in human sweat. Their study is published in the journal ACS Nano.

“It can continuously and accurately monitor the levels of potassium (K⁺), sodium (Na⁺), and calcium (Ca²⁺) ions, offering both real-time and long-term tracking capabilities,” said senior researcher Prof. Huang Xingjiu from the Institute of Solid State Physics at the Hefei Institutes of Physical Sciences of Chinese Academy of Sciences.

Tremendous progress has been made in sweat sensors based on electrochemical methods, making it easier to track body changes. The stability of the sensor chip is crucial for its application effect and service life, which is the key to ensuring the long-term reliable operation of the sensor.