Fig. 6: Light-adaptive, power-efficient multifunctional sensor.

a Exploded view schematic illustration that highlights all of the components featured in the other sensors, with the addition of a temperature sensor. b Block diagram of the electronics. c Images of the sensor on the neck with under room light, dim light, and dark environments. d On-body test results for measuring HR, SpO2, skin temperature, sweat chloride (Cl) concentration, and blue light dosimetry during exercise (Red: reference results, black: results from the multimodal sensor).