Our manufactured oximeters are a medical instrument that are used for measuring a person's blood oxygen level. These operate by shining light through a person's finger and observing how much of the light's waves are absorbed. The instrument then determines the blood's oxygen saturation level. The most frequent uses of oximeters in hospitals and doctor's offices are to check for signs of respiratory or cardiac distress or to monitor a patient's oxygen levels during surgery. They can also be used at home to check the oxygen levels of people with long-term medical conditions like COPD or asthma.