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Filter optics
Filter technology is rugged and needs very little maintenance. This is important in the demanding environments where our instruments often are used. It is also a very cost efficient technology, which provides the same accuracy as scanning grating instruments, but at a significantly lower cost of ownership.
Grain, Flour, Feed and Food analysis are only some of the advanced applications where filter technology is used. Other examples include fiberoptic telecom equipment, blood analysis and anaestetics monitoring during surgery.
Reflectance spectroscopy
NIR reflectance technology gives excellent accuracy for powder type samples. It gives very a robust performance, with relatively little sensitivity to things like sample packing technique. Transmittance technology on the other hand is highly influenced by the packing technique and the path length of the sample. The light simply does not pass through the sample with sufficient energy, with poor signal to noise ratio as a result. For the user this means a lower accuracy and a worse repeatability.
Multiple Linear Regression
When performing an analysis, an NIR grain analyzer needs to convert the spectral information it has collected into a protein or moisture content. There are several techniques available for the task and the Inframatic 8600 models use Multiple Linear Regression (MLR). MLR gives very robust calibrations and can successfully be used also when only a few samples are available for calibration development, which is not true of for example ANN. |