Arrangement in infrared analyzers

摘要: The invention relates to an arrangement in infrared analyzer for determining the proportion of a given substance or substances powderous material, such as flour. When making analysis, irradiates material with light and detects reflected from through window wall conduit, which is passed direction substantially parallel window. During held stationary, compacted conduit. conduit has arranged therein feed screw having controllable drive-means material-infeed end, extends horizontally slopes upwardly aforementioned infeed end. A control means steers drive cyclically manner that during first time interval activated inactivated, second period inactivated.