Gas Detection Meters

MSA Multi-Gas Meter
MSA Multi-Gas MeterMSA Multi-Gas MetersMSA Single Gas MeterAltair Trio Single Gas MeterMSA Multi-Gas MeterGalaxy Automated Test SystemAltair Quick Check Single Test SystemAltair Quick Check Test System

Gas measurement serves as a technical aid and an assessment of the concentration is only possible with a gas measurement device. To determine the hazard potential of a gas it is necessary to measure its concentration and to consider the duration of exposure and other parameters such as the type of work being performed.

Natural, ambient air is chemically a gas mixture that consists of 78% nitrogen, 21% oxygen 0.03% carbon dioxide as well as argon, helium and other rare gases in trace centrations. In addition there is water vapor, e. g. humidity. If the concentrations of the components change, or a foreign gas is added, we no longer have natural air. When these changes occur, the potential for adverse health effects exist.

If the composition of the natural air changes in any way testing should occur to determine the cause of the change. When it is unsure that an area is safe to enter because a substance may be present, testing must occur. Even substances with distinctive odours cannot be reliably assessed with the aid of the olfactory nerve in the nose. The olfactory nerve can become desensitized after a certain period of time or repeated exposure, making it impossible to smell even immediately dangerous concentrations. After a few hours we do not even perceive the pleasant fragrance of our own perfume and high concentrations of hydrogen sulfide escape from the sense of smell even after a very short while. Many air pollutants cannot be perceived by human senses because they are colorless and odorless (e. g. carbon monoxide).

Gas measurement serves as a technical aid and an assessment of the concentration is only possible with a gas measurement device. To determine the hazard potential of a gas it is necessary to measure its concentration and to consider the duration of exposure and other parameters such as the type of work being performed.

An important prerequisite to determining the potential of any gaseous air pollutants is the determination of the concentration with a suitable gas measurement device. The kind of device to be used depends on which gases have to be measured and how often.

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