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CHEMCO Exit Exam • Set 11 Question 8 of 30

For Oxygen analyzer, identify the statement that explains the working principle

✓

Direct Answer

Option B: Oxygen diffuses through a membrane into the cell and current flows between two special electrodes separated by a liquid or gel electrolyte.

Electrochemical oxygen analyzers operate by oxygen diffusing through a membrane into a cell, where it reacts at electrodes separated by an electrolyte. This reaction generates a current directly proportional to the oxygen concentration, providing accurate readings as per ISGOTT principles for gas detection.

All Options

A
Electrochemical Sensors: Analyzers of this type determine the oxygen content of a gas mixture by measuring the output of an electrochemical cell.
B
Oxygen diffuses through a membrane into the cell and current flows between two special electrodes separated by a liquid or gel electrolyte. (Correct Answer)
C
The current flow is related to the oxygen concentration in the sample and the scale is arranged to give a direct indication of oxygen content.
D
The analyzer readings are directly proportional to the pressure in the measuring cell, and only small errors are caused by normal variations in atmospheric pressure.

Detailed Explanation & Context

Electrochemical oxygen analyzers operate by oxygen diffusing through a membrane into a cell, where it reacts at electrodes separated by an electrolyte. This reaction generates a current directly proportional to the oxygen concentration, providing accurate readings as per ISGOTT principles for gas detection.

Relevant Framework: STCW 2010 Manila Amendments • DG Shipping E-Learning & Exit Exam Standards • Advanced Training for Chemical Tanker Cargo Operations (CHEMCO).

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