Re: Detector question????? tnx in advance
in response to
by
posted on
Apr 13, 2016 05:23PM
Abel, (and everyone else that was perplexed by this, lol )(kidding )
To followup: "To answer your question more directly though, think of the detector being able to "see" anything in the 850nm IR range. I think it's less a question of software and more a question of what are the things visible in the 850nm IR range, whether it's a direct laser light or a gas that's visible in the 850nm range with the aid of an emiter."
http://www.rkiinstruments.com/pages/faq/Catalytic_Infrared_Sensors.htm
Infrared gas detection is based upon the ability of some gases to absorb IR radiation. Many hydrocarbons absorb IR at approximately 3.4 micrometers and in this region H2O and CO2 are relatively transparent. As mentioned earlier, there are some hydrocarbons and other flammable gases that have poor or no response on a general purpose IR sensor. In addition to aromatics and acetylene, hydrogen, ammonia and carbon monoxide also cannot be detected using IR technology with general purpose sensors of 3.4 micron specifications.
Advantages
The major advantages of IR gas detectors:
Disadvantages
The limiting factors in IR technology:
Conclusion
There is clear need for both IR and catalytic detectors in industry. When making a choice, be sure to consider the field environment and the variables in detector design. Life-cycle cost assumptions will not hold true in all environments. The same can be said for detector mean-time-to-repair or failure. Careful analysis of detectors, suppliers and field experience will help you to select the best catalytic
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