Laser LevelSelf-leveling laserThe GL622 dual-grade laser from Spectra Precision/Trimble is an automatic self-leveling laser featuring grade capability of plus or minus 25 percent. It includes an HL750 Laserometer that provides a digital readout of elevation and can be used at an operating diameter of up to 2,600 feet. Wireless communication between the HL750 and the lasers provide automatic grade matching, which allows measurement of unknown grade values between two points. Each system also includes the RC602 full-function radio remote control, which has a simple graphic display and remote functionality up to 330 feet away. They can survive a drop
