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.
â¢ Use a dissolved oxygen probe to measure the oxygen concentration of water. â¢ Use the inferences about the amount of oxygen in the water to make conclusions about whether. the plant is respiring or photosynthesizing more in the light. â¢ Reinforce concepts about respiration and photosynthesis.