Here's the premise of how the Pulse Oximeter functions so as to give exact readings of the oxygen immersion levels in the blood: infrared light is consumed by oxygenated hemoglobin and the red light is permitted to go through. Then again, the inverse is said for the deoxygenated blood. Light emissions light and infrared light are coordinated from the oximeters through your finger and goes onto the photograph locator on the far edge. The blood oxygen meter finger, at that point, figures the proportion of the red light to the infrared light. This at that point gives the oxygen immersion level. People who are sound will have an oxygen immersion level between 95% to 99%. The oxygen immersion level demonstrates how well the heart, lungs and blood are providing organs with oxygen in the Finger Pulse Oximeter.