Pt. 3 - IN the MIX - Construction Safety and Gas Detection

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In our last blog (part 2 of 4) we consulted the OSHA Construction eTOOL to determine the factors that require a Gas Monitor. In this Blog (part 3 of 4) we explore Certified AIR SAFETY's tried and true method for determining which features of a gas detector are right for you. From our many years of selling and servicing this type of equipment, we have come up with what we believe is the definitive list of 3 types of portable gas detectors.

We list these as levels A, B and C

Level “A”
Chosen for the most robust of features and durability at the highest levels of detection. To be used for the detection of Combustible gases throughout the ppm, LEL, and Percent by volume ranges. Using Catalytic and Thermal Conductivity sensors to reliably detect the presence of High Levels of CH4 (% VOL) within an Inerted atmosphere of CO2, N2, etc.

Features an Oxygen sensor to determine the presence of oxygen in confined spaces, or to determine the Minimum level of oxygen for the reliable detection of combustible gases at lower levels (ppm, LEL).

Features a Carbon Monoxide, or other Toxic sensor to detect the presence of Toxic gases within a confined space 'as required by OSHA 29 CFR, 1910.146, (d)(5)(iii)' or within any work area.

Features Data Logging for the retrieval of exposure data, post incident, or for Industrial Hygiene monitoring of employee exposures, and the option of both Alkaline and rechargeable batteries in a field changeable configuration.

Features the use of a robust and reliable sample draw pump.

Level “B”
Chosen for Use within a Confined Space, or general area monitoring. To be used only for the detection and continuous monitoring of Combustible and Toxic gases within the ranges of Life Safety.
• Combustibles, 0 to 100% LEL.
• Oxygen, at the 19.5 or lower, and 23.5 or higher alarm levels.
• Toxic gases at the STEL, CEILING, and TWA alarm levels.
• The detector should be selected for durability, ease of use and reliability.

Features the use of A Catalytic (wheat stone bridge) Sensor for reliable detection of combustible gases (% LEL) within Confined spaces, or for general area monitoring.

Features an Oxygen sensor for the presence of oxygen in confined spaces, or to determine the minimum presence of oxygen for the reliable detection of combustible gases at lower levels (ppm, LEL).

Features a Carbon Monoxide, or other Toxic sensor to detect the presence of Toxic gases within a confined space 'as required by OSHA 29 CFR, 1910.146, (d)(5)(iii)' or within any work area.

Features Data Logging for the retrieval of exposure data, post incident, or for Industrial Hygiene monitoring of employee exposures, and the option of Both Alkaline and rechargeable batteries in a field changeable configuration.

Features the optional or built in use of a robust and reliable sample draw pump.

Level “C”
Approved for general leak detection (leak check) only.

Typically features the use of a Metal Oxide Semi Conductor Sensor for the detection of Combustible gases only at the lower levels of detection, PPM and LEL. These units do not generally feature interchangeable batteries between rechargeable and alkaline battery packs, Oxygen, Carbon Monoxide, or other Toxic sensors and are the least expensive to purchase.

“Leak check” monitors should not be used for the detection of gases within the life safety ranges, for confined space entry, pipeline inerting or hot work permitting.

Congratulations! You’ve determined the correct type of Personal Gas Monitor and perhaps made your Purchase. Or perhaps you already own one, and need some pointers on calibration and maintenance? In our next and final Blog for this series we'll provide a handy preparedness checklist, and many helpful hints!

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