The Automatic Sludge Blanket Level Detector from Markland Specialty Engineering helps monitor and control interface levels in sedimentation basins and clarifiers, including DAF units, decanting tanks, hoppers and upflow filter reactors. It automates solids removal when treating raw water, wastewater and backwash from sand/membrane filters. Users can program solids-removal pumps to operate only when necessary, preventing carryover, optimizing feed density for improved filter press/centrifuge/digester performance and improving outflow for reuse. It uses high-intensity infrared light to measure the settled sludge bed and overlying cloud layer. A slim profile makes it suited for constricted spaces. 855/873-7791; www.sludgecontrols.com.