Using a multi-frequency acoustic backscatter system as an in situ high concentration dispersion monitor

► Use of an ABS is demonstrated as an in situ concentration monitor.► Experimental echo responses are compared to theoretical fits. ► Theory found to overpredict concs. >2.5 g/L, due to interparticle scattering. ► A novel interpolated differential approach is then used to correlate concentration. ► Attenuation increase with respects to conc. found to be independent of system depth.