October 30, 2007
Trimble™s Spectra Precision GL412 Single Grade and GL422 Dual Grade offer horizontal level, grade and vertical plumb setup with no manual leveling and they send a continuous, self-leveled 360-degree laser reference over an entire work area. Both lasers feature a two-way, full-function remote control with built-in backlit grade display allowing the operator to use both the remote control and laser keypad including grade reverse on both axes up to 330 feet from the laser. The GL412 and GL422 lasers are compatible with both the company™s HR550 laser receiver at a 2,600-foot operating diameter and with its CR600 Laser. The lasers self-level in both horizontal and vertical modes in a wide variety of general contractor applications, including grading and excavating, vertical alignment and plumb for anchor bolt installation, tilt-up and curtain wall plumbing, concrete sections with runoff for sports fields, tennis courts and driveways, steep slope road embankments and ditch banks and parking garages, ramps and drainage.