Pulse oximeter PCBs are specialized core components engineered to precisely drive dual-wavelength LED light sources (660nm red and 940nm infrared) and capture transmitted light intensity via high-sensitivity photodetectors, converting optical signals into measurable electrical data to calculate blood oxygen saturation (SpO₂) and pulse rate with clinical-grade accuracy. Tailored for fingertip, handheld, and wearable form factors, our production process prioritizes micron-level optical alignment between LEDs and photodetectors during assembly, paired with rigorous factory calibration against gold-standard medical equipment. This ensures the PCBs deliver stable, life-critical readings even in low-perfusion scenarios, meeting strict medical device standards for reliability and precision.