The electrochemical sensor continuously monitors cortisol, which promotes wakefulness, and melatonin, which signals the body to sleep. The bioengineers have published a proof-of-validation study in Biosensors and Bioelectronics: X.

Using EnLiSense’s CORTI wearable device platform, the study is the first to demonstrate circadian rhythmicity of cortisol and melatonin levels measured through sweat. EnLiSense is commercializing the CORTI sensor platform.

Researchers said the technology offers a new approach to measure the hormones as consumer interest in wearables to monitor sleep quality is growing.