We use many different means to track the amount of air in fluids: dissolved oxygen meters for water, solvent-oxygen interactions that are visible for alcohols, and some solvents and sensors that measure the amount of oxygen in gasses themselves. From the amount of dissolved oxygen, we can infer the total amount of dissolved atmosphere in a fluid system. Early engineers found that many different systems were adversely affected by either the amount of oxygen dissolved in water, or oxygen and nitrogen together. The advent of the steam engine necessitated the study of corrosion of boiler tubes, deep sea divers had…[Read this article]