The Components of the Gas Detection Puzzle

Issue 11 and Volume 173.

By Jim Leer A survey of 185 first responders from career and volunteer fire departments in the southeastern region of the United Stated relative to four-gas monitors was conducted by the University of North Carolina—Charlotte in 2014. Respondents indicated a lack of understanding pertaining to instrument response readings of parts per million (ppm) and percent volume (% vol), instrument alarms, and type of calibration gases. Survey participants recommended that each department assess its capabilities and needs relative to training personnel on the use and interpretation of instrument response readings. RELATED FIREFIGHTER TRAINING Wireless Gas Detection Systems FIXED-POINT GAS DETECTION SYSTEMS This article explains how to interpret readings from instruments that contain oxygen, percent of lower explosive level (% LEL) flammable gas/vapor, carbon monoxide (CO), and hydrogen sulfide (H2S) sensors. These sensors are typically found in the multiple gas detectors commonly used by the fire service. Components for Interpreting Readings Four…

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