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.
The Winkler method for measuring dissolved oxygen involves titrating a sample with a series of reagents. Schematic diagram courtesy of the Washington State University Department of Ecology, which can be accessed via this link: How to Measure Dissolved Oxygen (more info) .