The Eagl-3 dual grade rotating laser and the Model 2500 GradeLight pipe laser are used for controlling depth and setting drainage pipes to grade. These cutting edge laser guided systems have replaced batter boards and strings in drainage canal and pipeline trench projects. They are easy to use, reduce costly errors and increase production. The laser transmitter is mounted above the trench or at a manhole location and aligned in the proper direction, at the desired grade and left unattended. When the Model 368 Excavating sensor is mounted to an excavator, the depth of drainage canals or pipeline trenches can be controlled from inside the excavator cab. Lasers on the job mean time and cost savings Ð and a job done right!