Scuba Diving International (SDI) Computer Nitrox Practice Exam

How can age affect the performance of an oxygen sensor?

1. It can increase its sensitivity

2. It can cause a delay in response

3. It can result in inaccurate readings

4. It has no effect on its performance

The correct answer is: It can result in inaccurate readings

The performance of an oxygen sensor can be significantly impacted by age, resulting in inaccurate readings as the sensor ages. Over time, the materials within the sensor can degrade, leading to a decline in its ability to accurately detect and measure the concentration of oxygen. Factors such as exposure to environmental conditions, contaminants, and the mechanical wear from regular usage contribute to this deterioration. Therefore, it's crucial for divers and technicians to regularly calibrate or replace oxygen sensors to ensure that they are receiving correct information regarding the oxygen levels during dives. This understanding emphasizes the importance of maintaining equipment and monitoring the condition of sensors, especially as they age, to ensure safety and reliability when using nitrox mixes.