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NIR technology compared

A recent whitepaper written by NIR experts working at FOSS compares the strengths and weaknesses of different NIR technologies: scanning grating, fixed grating DDA and FT-NIR.

The paper also discusses the specifications used to define the different technologies and how these impact performance.

The paper is available for download here from the website – a non-promotional site aimed at promoting effective use of NIR technology through shared information and opinion.  


FT-NIR Interferometers, Scanning Grating Monochromators and Fixed Grating Detector Diode Array technologies -the three spectrometer technologies in this comparison all have their individual advantages and disadvantages.

For quantitative measurements for food and agricultural products, for instance for benchtop analysis of cereal grain, feed, milk powder, ground meat or similar, a scanning grating spectrometer is a proven choice.

For measurements close to production processes, for example in a feed mill where an analyser is used close to the processing line or is mounted directly in the process for continuous in-line measurements, fixed grating DDA is the best option.

For qualitative measurements in the laboratory where narrow instrument bandwidth is needed, FT-NIR has advan­tages. Its unmatched resolution makes it ideal for pin-point qualitive measurements of substances having narrow absorption bands or for some quantitative measurement ap­plications for samples having closely spaced narrow absorption bands.

Comments and discussion

The site includes a comments area below the article, plus a related Linked-in page allows discussion with industry peers on a variety of subjects related to NIR and its application in the feed industry. 

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