Researchers Test Wearable Sweat Sensor at Construction Site
The device sent data for nearly three hours during a normal workday, but researchers say accurate sweat readings need more testing.
- By Danielle Naidu
- Oct 12, 2026
Researchers at Tokyo University of Science have tested a wristwatch-style sensor designed to monitor sodium and potassium levels in sweat during construction work, a development that could eventually support workplace heat safety programs.
The device recorded signals responsive to the two electrolytes for about 2 hours and 45 minutes as the worker moved around the site, took breaks, drank fluids and ate meals, the researchers said. It sent the data wirelessly to a computer and saved it on a microSD card. The researchers said the test shows the system works in the field, but measuring sweat chemistry accurately will require controlled sweating experiments and further validation.
The team, led by Isao Shitanda, an associate professor in the university's Department of Pure and Applied Chemistry, developed the system to address the lengthy preparation some printed reference electrodes need before producing stable readings.
The device combines sodium- and potassium-selective electrodes with a printed reference electrode that stabilizes rapidly. A layer of fabric and superabsorbent fiber helps move sweat through the sensing area.
The researchers see potential for future monitoring and hydration support in hot workplaces by combining sweat-ion information with data such as sweat volume and water intake. The study was published online Sept. 21 in ACS Omega.
About the Author
Danielle Naidu is assistant editor for Security Today, Campus Security Today, Occupational Health & Safety and Environmental Protection Online.