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Reading: NDIR Gas Analyser Working Principle
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Inst Tools > Blog > Analyzers > NDIR Gas Analyser Working Principle

NDIR Gas Analyser Working Principle

Last updated: August 25, 2018 2:47 pm
Editorial Staff
Analyzers Animation How It Works
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NDIR GAS ANALYSER WORKING PRINCIPLE ANIMATION

For NDIR Gas analyzer, the main components are an infrared source (lamp), a sample chamber or light tube, a wavelength filter, and the infrared detector. The gas is pumped (or diffuses) into the sample chamber, and gas concentration is measured electro-optically by its absorption of a specific wavelength in the infrared (IR). The IR light is directed through the sample chamber towards the detector.

The detector has an optical filter in front of it that eliminates all light except the wavelength that the selected gas molecules can absorb. Ideally other gas molecules do not absorb light at this wavelength, and do not affect the amount of light reaching the detector. The detector measures the attenuated signal depending amount of gas absorption and it is proportional to the measured gas concentration.

Also Read: Infrared Non Dispersive CO2 Analyzer Working Principle

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3 Comments
  • amin shakiba says:
    May 2, 2016 at 11:36 am

    thank you

    Reply
  • Neeraj Sharma says:
    May 31, 2016 at 2:51 pm

    Thank You so much sir

    Reply
  • Hezy Ram says:
    September 22, 2021 at 2:28 pm

    how much it cost initially? and what is the cost to operate it (yearly)?

    thanks

    Reply

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