The oxygen monitor is a non-invasive device used in clinical and laboratory environments to measure the amount of oxygenated and de-oxygenated tissue in the body and brain. It does so by using a patented technology along with near Infrared spectroscopy to manipulate light and measure how well the sample scatters and absorbs the light. Since it measures the oxygen content directly, it does not require any calibration or estimation of the scattering of light. This device is used in the monitoring of premature infants, sleep apnea patients, sport medicine, brain oxygenation and many other instances where oxygen content in tissues, not arteries is required.