Digital Pulse Oximeter is used to check how well your heart is pumping oxygen through your body. It may be used to monitor the health of individuals with any type of condition that can affect blood oxygen levels, especially while they're in the hospital. This oximeter measures the percentage of oxygen in haemoglobin proteins, called oxygen saturation. Digital Pulse Oximeter is a non-invasive method of measuring one's blood oxygen level as this count is a measure of how much oxygen your red blood cells are carrying. The lungs then distribute oxygen into the blood via haemoglobin proteins in red blood cells. These proteins provide oxygen to the rest of the body.