Printed Wearable Sweat Rate Sensor for Continuous <i>In Situ</i> Perspiration Measurement

Printed Wearable Sweat Rate Sensor In article number 2400927, Mohammad Shafiqul Islam, Yasser Khan, and colleagues introduce a wireless, flexible sweat rate sensor developed using direct 3D writing and integrated microfluidics for real-time monitoring of sweat dynamics. The device features printed encapsulated metal electrodes that achieve high-sensitivity capacitance measurements (0.01 µL min−1) within a compact, lightweight design. Sweat rate data is wirelessly transmitted to a smartphone application, with the system validated through comprehensive modeling, simulations, and experiments. Art by the team of INMYWORK Studio (https://inmywork.com).