Vorrichtung zur optischen Bestimmung von Inhaltsstoffen eines rieselfähigen Gutes

For optical determination of ingredients of a pourable product by NIR spectroscopy, to attain replicable measurement results, the device provides that the product flows in the direction of gravity; that a valve is disposed in the conduit downstream of the measurement window and a controller is embodied to move the valve to its closed position at least for the duration of measurement. The method is distinguished in that the product flows in the direction of gravity pas a measurement site; is dammed up downstream of the measurement site in such a way that the flow comes to rest at the measurement site; is dammed up in the direction of gravity past a measurement site; is dammed up downstream of the measurement site in such a way that the flow comes to rest at the measurement site; and after the measurement, the product is removed from the stagnant segment.