For the municipality of the same name in Gloucester County, see Monroe Township, Gloucester County, New Jersey.
How to measure dissolved oxygen. Dissolved oxygen is measured using a dissolved oxygen meter. The best method is to take the measurement in the field at the same time each day because DO concentrations can vary throughout a 24 hour period.issolved oxygen (DO) is a measure of the quantity of free oxygen molecules in water.
By calculating the amount of light absorption, the device can measure how saturated the hemoglobin is with oxygen molecules, or O2 sat. Normally, the oxygen saturation of the blood is around 98 to 100 percent. Arterial blood gas study â In this procedure, blood is drawn out of an artery, usually in the wrist, using a needle and syringe. The blood is then sent through an analyzer to measure the amount of oxygen gas dissolved in the blood.