Markland Specialty Engineering’s Meter measures and monitors the density of process slurries and primary, secondary, return-activated and backwash sludge in pipes, tanks, re-circulation loops and clarifiers. It helps operators determine dry/liquid additive dosages for preferred concentrations and flocculent dosages for improved filter press/centrifuge/digester performance. The meter allows users to program underflow pumps to automatically shut off before biosolids become too thin. The non-intrusive sensor uses safe ultrasound (no permits/approvals needed) and is simple to install, calibrate and clean. Readings are not affected by particulate/fluid color.