How Does a SPO2 Sensor Work
Pulse oximeter sensors operate through the utilization of an LED (Light Emitting Diode) in combination with a light detector to assess the level of oxygen saturation in the bloodstream. Oxygen saturation refers to the proportion of oxygen molecules bound to hemoglobin in the blood. The fundamental principle behind this operation hinges on the distinction that oxygen-rich blood absorbs higher quantities of infrared light, while oxygen-poor (deoxygenated) blood absorbs more red light. The pulse oximeter assesses the absorption levels of diverse light wavelengths and subsequently provides readings for both the heart rate and blood oxygen concentration, which is typically expressed as a percentage.