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Infrared Gas Sensor
In recent years, the rapid development of monitoring and detecting technology of indoor air quality have been observed. We have seen the two major streams of detection technology introduced so far: Acoustic wave sensor and Infrared gas sensor. The use of a gas monitoring system in the case of that dangerous levels of gases are detected, can help to prevent an explosion or can help to prevent worker injury or exposure to toxic gases. Action can be taken, and initiated automatically by the gas monitor, to help prevent the gas level from rising further. Such action could be the automatic shutoff of gas valves, turning on a ventilation fan, shutting down a process, or audible and visual alarms to alert and evacuate personnel. In some situations, the gas monitor is used for process control. Different with acoustic wave sensors which were described at the website (http://www.new-technologies.org/ECT/Other/AcousticWaveSensor), infrared gas sensors were created and have been developed on the basis of the fact that most gases have unique infrared signatures in the 2-14 micron wavelength region and each gas has a unique infrared absorption line.
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