Confined-space gas measurement resources
Resources on oxygen deficiency, carbon dioxide accumulation and measurement protocols. Site procedures and legal requirements must be checked against current official guidance.
Compiled by AI Safety Korea Co., Ltd. · September 22, 2026
Suggested reading order
Half of oxygen deficiency begins with CO₂ accumulation
In confined spaces, carbon dioxide can displace air and be generated by biological decomposition, fermentation, and respiration, creating both oxygen deficiency and its own toxicity. This article explains how to manage CO₂ sources, other causes of oxygen deficiency, measurement, ventilation, and rescue procedures instead of judging safety by oxygen readings alone.
Korean confined-space asphyxiation accident statistics and the measurement gap
By distinguishing reporting periods and units in recent Korean official statistics, this article examines the severity of confined-space asphyxiation accidents and how to narrow the measurement gap where measurement and recordkeeping break down in the field—not because standards are absent.
Pre-entry Measurement Procedure for Confined Equipment — A Cross-industry Protocol
A practical sequence for entering tanks, reactors, silos, ducts, and other confined equipment: risk assessment, energy isolation, remote multi-point atmospheric testing, ventilation, continuous monitoring, and rescue preparation.
Why Manhole and Septic-Tank Asphyxiation Accidents Recur Every Year
Manhole and septic-tank asphyxiation accidents do not recur solely because hazardous gases are unknown. The pattern combines a failure to treat brief inspections as formal confined-space work, information gaps between clients and contractors, one-time measurement, and unprepared co-worker rescue. This article examines how to read hydrogen sulfide, methane, carbon dioxide, and oxygen together and connect work permits, continuous monitoring, ventilation, and non-entry rescue in one operating system.
Why Rescuers Become 2nd Victims
This article examines why people attempting to rescue colleagues in confined spaces collapse one after another, focusing on impulsive entry, unverified atmospheres, and the absence of a rescue plan, and sets out practical principles for non-entry retrieval, respiratory protection, and incident command.
Check each article’s sources, dates, measurement boundaries and limitations. Trial periods, equipment, calibration, missing data and publication permissions require project-specific evidence.
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