Method and device for monitoring the quality of nanofibrillar cellulose

A device for monitoring the quality of nanofibrillar cellulose produced in a disintegrating process comprising disintegrating fibers of cellulose pulp, characterized in that the disintegrating process comprises:

• measuring in real-time optically the turbidity of a dispersion containing nanofibrillar cellulose obtained from said disintegrating process, and
• correlating the measured turbidity to the quality of the produced nanofibrillar cellulose to determine the quality of said produced nanofibrillar cellulose, wherein lowered turbidity indicates increased quality of the nanofibrillar cellulose,
• the device being arranged to monitor a dispersion containing said produced nanofibrillar cellulose obtained from a disintegrating device, characterized in that the monitoring device comprises
• means for measuring optically the turbidity of said dispersion in real-time, and
• means for determining the quality of said produced nanofibrillar cellulose using a correlation between the measured turbidity and said quality of the produced nanofibrillar cellulose, wherein lowered turbidity indicates increased quality of the nanofibrillar cellulose.