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.
Percent saturation is the measured dissolved oxygen level divided by the greatest amount of oxygen that the water can hold under various temperature and atmospheric pressure conditions multiplied by 100. Left: This graph shows the maximum amount of oxygen that can be dissolved in water at different temperatures.hoto: Courtesy of Dr. Ben Stout. One measure of dissolved oxygen in water is parts per million (ppm), which is the number of oxygen molecules (O 2) per million total molecules in a sample. Calculating the percent saturation is another way to analyze dissolved oxygen levels.