Multi-gas instruments are widely used and are usually capable of housing four different sensors. A typical configuration would comprise sensors for measuring: identify one that will be of major importance for enclosed space entry,
Direct Answer
Option C: Oxygen (using an electrochemical sensor).
For enclosed space entry, measuring oxygen levels is paramount. An oxygen deficiency (below 20.9% by volume) presents an immediate life threat, making the electrochemical oxygen sensor a critical component of multi-gas detectors, as mandated by ISGOTT and SOLAS Chapter XI-1/7 requirements for safe entry.
All Options
Detailed Explanation & Context
For enclosed space entry, measuring oxygen levels is paramount. An oxygen deficiency (below 20.9% by volume) presents an immediate life threat, making the electrochemical oxygen sensor a critical component of multi-gas detectors, as mandated by ISGOTT and SOLAS Chapter XI-1/7 requirements for safe entry.
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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