A pulse oximeter is a small, non-invasive medical device that measures the oxygen saturation levels in a person's blood. It works by using a light sensor to measure the amount of oxygen-carrying hemoglobin in the blood, and displays the results on a digital screen as a percentage. Pulse oximeters are commonly used in hospitals, clinics, and at home for individuals with respiratory or cardiovascular conditions.

A pulse oximeter is a small, non-invasive medical device that measures the oxygen saturation levels in a person's blood. It works by using a light sensor to measure the amount of oxygen-carrying hemoglobin in the blood, and displays the results on a digital screen as a percentage. Pulse oximeters are commonly used in hospitals, clinics, and at home for individuals with respiratory or cardiovascular conditions.