Advantages and Disadvantages of NDIR Analyzers

The principal advantage of using Non-Dispersive Infrared (NDIR) is that it directly and specifically measures the CO2 generated by oxidation of the organic carbon in the oxidation reactor, rather than relying on a measurement of a secondary, corrected effect, such as used in conductivity measurements.

Advantages of NDIR Analyzers

  • The low temperature techniques have the advantage of allowing a large volume of sample to be analyzed thereby improving the low limit of detection.

  • Also the blank value is very low as long as the reagents are pure, which makes the analysis more accurate

Disadvantages of NDIR Analyzers

  • Usually the particulates are more difficult to oxidise by nature or organics escape exposure to the reagents by being within the interstitial spaces of the particles.

  • High molecular weight compounds such as proteins may be slow to oxidise with the low temperature techniques.