Description
GY-MAX30102 Heart Rate, Blood Oxygen Concentration Sensor Module
The pulse oximeter detects the oxygen saturation in the blood stream. Since blood oxygen saturation can reflect early medical problems such as the heart and lungs, this reading is very useful as a general health monitoring indicator.
Its working principle is based on the light absorption properties of hemoglobin in the blood. Oxyhemoglobin absorbs more infrared light than red light, while deoxyhemoglobin absorbs more red light than infrared light. Therefore, the red and infrared LEDs in the oximeter emit light alternately, and the photodiode receives light signals that are not absorbed. The ratio of red light and infrared light received by the photodiode is used to calculate the percentage of oxygen in the blood. According to the pulsation characteristics of arterial blood flow, the pulse rate and intensity are also determined and displayed during the measurement.
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