We confirm possibility of noninvasive measurements of hemoglobin concentration by means of wrist wearable device. The dataset consists of 170 volunteers with the reference hemoglobin concentrations in the range of 65–176 g/L. The developed algorithm predicts hemoglobin concentration with the mean absolute error as low as 6.8 g/L and correlation coefficient with the reference blood test equal 0.66.

https://ieeexplore.ieee.org/document/10437978