Maxim bio sensor for HRM/SpO2/BP are based on optical signals. Thus mechanical design is very important. With fine design, Maxim algorithm outputs high accuracy HRM/SpO2/BP values.
HRM error is +-2bpm;
SpO2 error is <=3.14%, which could reach FDA grade;
BP: reach BHS grade B (MAD 6mmHg) and under improvement.