We are supplier, manufacturer,exporter based in india of pulse oximeter. Oxygen binds to hemoglobin in red blood cells when moving through the lungs. It is transported throughout the body as arterial blood. A pulse oximeter uses two frequencies of light (red and infrared) to determine the percentage (%) of hemoglobin in the blood that is saturated with oxygen. The percentage is called blood oxygen saturation, or spo2. A pulse oximeter also measures and displays the pulse rate at the same time it measures the spo2 level.