The evaluation of the MEX-3DC silt sensor

The measurement of the suspended sediment concentrations in rivers, harbours and tidal basins is often a crucial part of a hydraulic engineering study. Accordingly, there has been a demand for reliable suspended solids sensors which are capable of being used in field situations as remote monitors. This report describes the evaluation of MEX-3DC Suspended Solids Meter manufactured by EUR-Control. Evaluation took the form of a laboratory investigation of the long gap sensor's stability, and responses to temperature, formalin and mud suspensions, and a field trial in which the sensor was deployed with an appropriate logging system at Grangemouth on the Firth of Forth.