Answer
Mar 28, 2025 - 01:39 PM
The SpO2 sensor, commonly found in pulse oximeters, measures blood oxygen saturation by emitting light through a body part, typically a fingertip or earlobe. It uses two wavelengths of light—red and infrared—to differentiate between oxygenated and deoxygenated hemoglobin based on their distinct light absorption properties. The device then calculates the ratio of these two types of hemoglobin to estimate the percentage of oxygenated blood, displaying it as the SpO2 level.
