“ASRM-1300”, the automatic on-line sedimentation rate meter.
The ASRM-1300 measures the time required for the sample to become clear or translucent, down to a fixed (adjustable) distance beneath the surface. The instrument sucks a sample from the process, to a measuring cell (cylinder), where the required time for settling is measured. The sample is then returned to the process. Then the instrument sucks up a dose of the detergent, for instance an acid, from a container and sprays the detergent into the cylinder. The cylinder is then washed with water, and the cycle is repeated. The frequency of washing with detergent is programmable. The instrument gives you a unique possibility for process optimizing, because it measures the response to changes in settling properties so rapidly and automatically. A manual sample is not the same, it is not possible to replicate an automatic measurement because the manual measurement is depending of how accurate the operator is.
This is truly an early warning system for any oncoming process difficulties. The instrument is a complete-working unit for sampling, measuring and washing of the cell. It has 4-20 mA output and Modbus RTU computer interface.
The sample is usually taken from a tank, launder or pipe, before the thickener or filtration station, but after the addition of flocculant, if used.