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What is a combustible gas?
A combustible gas or vapor can ignite when its concentration in air is within its flammable range and an ignition source is present. Common examples
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Which technologies are used for combustible gas detection?
Common technologies include catalytic bead, infrared, semiconductor, and laser-based detection. Each has limits. Catalytic sensors depend on sufficient oxygen and may be affected by poisons
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Can a combustible gas detector also monitor toxic gases?
A combustible-gas sensor by itself does not measure toxic gases. A multi-gas instrument can include separate combustible, toxic, and oxygen sensors if the model supports
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What is a toxic gas?
A toxic gas can cause harmful health effects at relevant concentrations and exposure times. Examples include carbon monoxide, hydrogen sulfide, ammonia, chlorine, and nitrogen dioxide.
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How should toxic gas alarm setpoints be selected?
Qualified safety personnel should set alarms using the applicable occupational exposure limits, emergency limits, site risk assessment, instrument performance, and response procedure. TWA, STEL, ceiling
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How can nuisance or false alarms be reduced?
First identify the cause. Possible factors include cross-sensitive gases, cleaning chemicals, humidity or temperature shifts, contamination, poor placement, electrical noise, incorrect settings, or a failing
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Can toxic gas detectors be installed outdoors?
Yes, when the detector and accessories are rated for the environment. The design should consider water, dust, wind, temperature, corrosion, sunlight, and how outdoor airflow
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How do natural gas and LPG behave after a release?
Natural gas that is mostly methane is generally lighter than air and may rise. LPG vapor is generally heavier than air and may collect at
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What is the difference between LNG and CNG?
LNG is natural gas cooled to a cryogenic liquid for storage or transport. CNG is natural gas stored as a high-pressure gas. Both can create
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What is a household gas alarm?
A household gas alarm is designed to warn occupants of a specified residential gas hazard, such as natural gas, LPG, or carbon monoxide. Combustible-gas and
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Where should a household gas alarm be installed?
Follow the installation instructions supplied with the exact alarm and applicable local codes. Placement depends on the fuel, appliance, room layout, airflow, and alarm type.
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Can I install a household gas alarm myself?
Battery-operated or plug-in alarms may allow user installation when the manual and local rules permit it. Hardwired units, interlocked systems, valves, and installations near gas
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