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This test does not only validate the cell. If the sensor does not display the expected value, it is possible that the oxygen sensor, the pressure sensor (depth), or the gas mixture F O 2, or any combination of these may be faulty. As all three of these possible faults could be life-threatening, the test is quite powerful.
An oxygen sensor (or lambda sensor, where lambda refers to air–fuel equivalence ratio, usually denoted by λ) or probe or sond, is an electronic device that measures the proportion of oxygen (O 2) in the gas or liquid being analyzed. [1] It was developed by Robert Bosch GmbH during the late 1960s under the supervision of Günter Bauman. [1]
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.
An insidious problem with oxygen sensor failure is when a sensor indicates a low oxygen partial pressure which is actually not low, but a sensor failure. If the diver or the control system respond to this by adding oxygen, a hyperoxic gas can be caused which may result in convulsions.
With this, over 960 L/min can be produced. The ramp-up time — the elapsed time until a multi-bed concentrator is producing oxygen at >90% concentration — is often less than 2 minutes, much faster than simple two-bed concentrators. This is a big advantage in mobile emergencies.
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