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Versatile Automatic Grade Lasers for Level, Grade and Vertical Alignment
The Spectra Precision® Laser GL412 and GL422 Grade Lasers are cost-effective, automatic self-leveling lasers that do three jobs—level, grade and vertical alignment with plumb. Both lasers feature a 2-way, full-function remote control so you can make grade changes from anywhere on the jobsite for reduced setup time and faster operation.
The GL412 (single grade) and GL422 (dual grade) lasers send a continuous, self-leveled 360-degree laser reference over your entire work area, and have a wide grade range so they can be used in a variety of slope applications.
Fast, easy horizontal level, grade and vertical plumb setup with no manual leveling
Easy setups with the 2-way, full-function radio remote control and single and dual grade application capability offer quick payback
Automatic temperature and grade compensation eliminates rework
Very long operating range of 800 m (2,600 ft) for GL422 increases machine control capability and reduces setups over the jobsite.
Leveling concrete forms and footers
General construction vertical alignment and plumb such as anchor bolt and form alignment
Grading and excavating
Concrete sections with runoff for sports fields, tennis courts and driveways
Steep slope road embankments and ditch banks
Parking garages, ramps and drainage
Laser type / class
<5 mW 635 nm, Class 3A/3R (GL422) 3 mW 650 nm, Class 2 (GL412)
Drop height on concrete
1 m (3 ft)
Operating diameter (w/ HL700)
800 m, 2600 ft (GL422) 600 m, 2000 ft (GL412)
H/V Electronic Self Leveling
Yes, every 5 °C
Level / vertical accuracy
10 arc seconds 1.5 mm @ 30 m (1/16" @ 100 ft)
–10 to +15% Dual Axes (GL422) –10 to +15% Single Axis (GL412)
0.015% 3 mm@30 m (1/8" @ 100 ft)
0.001% up to 9.999%, 0.01 % at higher grades
Remote control type
Full 2-way communication, operation and security lock with transmitter