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Gas detector selection guide

Compare target gases, sensors, measurement ranges and maintenance requirements against the individual product catalogs.

Compiled by AI Safety Korea Co., Ltd. · September 22, 2026

Suggested reading order

  1. From 4 Gas to 5 Gas: Industrial Safety Measurement Configurations Are Changing

    This article examines the configuration and limits of conventional 4-gas detectors, then sets out principles and operating conditions for selecting a fifth sensor through site-specific risk assessment.

  2. The value of 5-gas equipment lies in the number of decision-making bases, not the number of channels

    The value of a portable 5-gas detector lies not in having five sensors, but in connecting hazards identified by field risk assessment to decisions on entry, evacuation, ventilation, and work stoppage. This article organizes sensor combinations, bump tests, sampling locations, and action criteria into one decision system.

  3. Why NDIR sensors entered industrial safety

    A practical explanation of NDIR sensors, from how they selectively read CO₂ through infrared absorption to industrial packaging, cross-sensitivity, condensation and dust control, calibration, and performance limits.

  4. Sensor life, replacement criteria and environmental factors by sensor type

    This article compares degradation characteristics of electrochemical, catalytic-combustion, NDIR, PID and semiconductor gas sensors, and explains how to determine replacement timing from calibration and functional-test records and environmental history rather than calendar age.

  5. How Wider Use of Portable Gas Detectors Can Change Industrial Safety in Korea

    Portable gas detectors can make hazards visible earlier. Their safety value depends on risk assessment, ventilation, training, testing, and records working together.

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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