To State The Obvious, detecting toxic or combustible gases—or the lack of appropriate oxygenation in an area—before an event occurs is an important part of maintaining security in commercial, institutional and industrial applications, including wastewater plants, refineries and nuclear facilities. It also is an opportunity for electrical contractors to engage in a growing market as asset protection and personnel security become increasingly mandated. According to Frank Yesh, marketing at Rel-Tek Corp., Monroeville, Pa., the three main types of gas hazards are toxic, flammable and asphyxiate. Examples of toxic risk is poisoning by carbon dioxide, carbon monoxide, hydrogen or chlorine. Flammable gases that present the risk of fire and/or explosion include propane, methane, compressed natural gas or liquefied natural gas, and asphyxiates result in suffocation when oxygen is displaced or consumed by reaction with another gas.
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