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The type of oxygen sensor used in most underwater diving applications is the electro-galvanic oxygen sensor, a type of fuel cell, which is sometimes called an oxygen analyser or ppO 2 meter. They are used to measure the oxygen concentration of breathing gas mixes such as nitrox and trimix . [ 9 ]
The oxygen content of a stored gas mixture can be analysed by passing a small flow of the gas over a recently calibrated cell for long enough that the output stabilises. The stable output represents the fraction of oxygen in the mixture. Care must be taken to ensure that the gas flow is not diluted by ambient air, as this would affect the reading.
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Date/Time Thumbnail Dimensions User Comment; current: 15:25, 20 October 2020: 1,239 × 1,752 (196 KB): Balkanique: Uploaded a work by The OCEAN ATLAS 2017 is jointly published by the Heinrich Böll Foundation Schleswig-Holstein, the Heinrich Böll Foundation (national foundation), and the University of Kiel’s Future Ocean Cluster of Excellence.
The above reaction requires a steady stream of electrons to the cathode, which depends on the rate at which oxygen can reach the electrode surface. Increasing the voltage applied (between the Pt electrode and a second Ag electrode) will increase the rate of electrocatalysis. Clark affixed an oxygen permselective membrane over the Pt electrode.
Dissolved oxygen levels required by various species in the Chesapeake Bay (US). In aquatic environments, oxygen saturation is a ratio of the concentration of "dissolved oxygen" (DO, O 2), to the maximum amount of oxygen that will dissolve in that water body, at the temperature and pressure which constitute stable equilibrium conditions.
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