What device is used to check for an oxygen deficient atmosphere before entering an empty storage vessel?

• A. Manual gas tester
• B. Electronic gas detector
• C. Simple litmus test
• D. Chemical indicator

Answer: (B)

An electronic gas detector is preferred for checking an oxygen-deficient atmosphere before entering an empty storage vessel due to its accurate and reliable measurement capabilities. These devices are specifically designed to detect various gases, including oxygen levels, and provide real-time readings that indicate whether the atmosphere is safe for entry. They often come equipped with alarms that activate when oxygen levels fall below safe thresholds, ensuring immediate awareness of potential hazards.

Manual gas testers, while useful in some scenarios, lack the precision and automation of electronic detectors. Simple litmus tests and chemical indicators are not effective for this application, as they do not provide a direct measurement of gaseous concentrations such as oxygen and cannot reliably indicate the presence of insufficient oxygen in an environment where lack of oxygen poses serious risks. Electronic gas detectors therefore enhance safety by ensuring that workers are informed of atmospheric conditions before entering confined or potentially hazardous spaces.