The ES-620 from Electro Scan locates and measures sewer defects not typically seen by CCTV. Available as a stand-alone van or add-on to existing CCTV trucks, it finds and measures defect start and end points, size, and estimated gpm of defect flow, in accordance with ASTM 2550-13. Since most pipes are made of non-conductive materials, no electrical current should be able to escape through the wall of a pipe, unless there is a crack or opening. The greater the electric current that flows through a defect, the larger the size of a leak. It is designed for 6- to 24-inch pipe diameters, traveling at the rate of 45 to 60 feet per minute. It measures defect flows for pre- and post-CIPP lines, with no operator observations required. 916/779-0660; www.electroscan.com.