Perten releases new ANN and PLS grain calibrations

As part of our regular improvement work, Perten Instruments now release new calibrations for wheat and other grains for the Inframatic 9500 and Inframatic 8800 NIR instruments. The calibration techniques used include ANN and PLS.

Grain is a natural product which changes slightly from year to year, and NIR grain calibrations need to be updated on a regular basis for optimum performance. Perten now releases its latest version of grain calibrations for the two models IM 9500 and IM 8800, based on tens of thousands of samples collected over many years.

Our philosophy is to evaluate all calibration techniques available and choose the most suitable in each situation. Techniques such as ANN and PLS each have their strengths, and this is reflected in the results of our calibration update work. For IM 9500 the calibrations for protein in wheat and barley is based on ANN, whereas moisture and other calibrations use PLS. For IM 8800 most calibrations use ANN, but certain models are based on PLS.

Generally speaking, the more similar individual instruments are to each other, the lesser the benefits of ANN. For an instrument model like Inframatic 9500 with a design that makes instruments are almost identical to each other, the benefits of ANN are not as strong, which is one reason PLS turned out to be the best technique for the moisture calibrations.

More information on PLS, ANN and other calibration techniques can be found in an overview article.