The TruCore large-diameter, accurate and user-friendly sludge sampler from Sim/Tech Filter is designed for use in the thicker sludge common to septic tanks. It allows samples to be taken quickly without creating excessive turbulence because there are no restrictions caused by valves, stoppers and flaps. With an inside diameter of 1 3/8 inches, the capacity per foot is almost 10 ounces. The straight-through design also allows the sample to be quickly and effortlessly returned to the tank. The unit is made of a polycarbonate sampling tube (marked every foot) and PVC fittings. It comes as a single-piece 8-foot unit, or as two 4-foot sections that slip together. Custom sizes and configurations are available, as is an extension kit for deeply buried tanks. 888/999-3290; www.simtechfilter.com.