The Suspended Solids Density Meter from Markland Specialty Engineering provides real-time knowledge of primary, secondary, return activated and backwash sludge/silt concentrations in pipes, clarifiers and tanks, and helps automate biosolids removal. It helps operators reduce polymer and energy waste by optimizing flocculent dosages for preferred feed densities and enhancing dewatering equipment performance by programming underflow pumps to shut off before biosolids density becomes too thin. Both nonintrusive inline pipe spool piece and throw-in style versions are simple to install, calibrate and clean. The safe ultrasonic sensor needs no permits/no approvals. Readings are not affected by color. 855/873-7791; www.sludgecontrols.com.