Impressive Power in a Compact Package! The Geoprobe® 8140DT Rotary Sonic, eight years in development, features the GV4 rotary sonic head (patent pending) designed and manufactured only by Geoprobe Systems®. This high-capacity, mid-sized sonic machine has the capacity to advance large diameter tooling yet maintain the compact Geoprobe® footprint. Other features include a Pullback Breakout system, large diameter tooling options, an unmatched warranty, and the popular Geoprobe® Drop Rack System. See the machine at the Geoprobe® April 22, 2010 Open House or call 1-800-436-7762 for a demonstration. www.geoprobe.com Geoprobe Systems.