Lasers Spectra Precision Laser GL412 and GL422 » General Equipment & Supplies, Inc.

Lasers Spectra Precision Laser GL412 and GL422

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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)
Compensation method H/V Electronic Self Leveling
Temperature compensation Yes, every 5 °C
Level / vertical accuracy 10 arc seconds
1.5 mm @ 30 m (1/16" @ 100 ft)
Grade range –10 to +15% Dual Axes (GL422)
–10 to +15% Single Axis (GL412)
Grade accuracy 0.015% 3 mm@30 m (1/8" @ 100 ft)
Grade resolution 0.001% up to 9.999%,
0.01 % at higher grades
Grade compensation Yes
Remote control type Full 2-way communication,
operation and security lock with transmitter
Remote control range (w/ RC402) 100 m (330 ft) radius
Rotation speed 0 (GL422), 300, 600 RPM selectable
Transmitter battery life (4 x D NiMHs) hours
RC402 battery Life (2 x AA Alkaline) 130 hrs continuous
1 year under normal use
Mask mode User selectable to any window
3 windows maximum
Standby mode Yes
Display backlight Yes, auto shutoff after 8 seconds
Mounting threads 5/8" x 11 Horizontal and Vertical
Operating temperature –20° to +50°C (–4° to 122°F)
Dimensions 21L x 18W x 20H cm (8.3L x 7.1W x 7.9H in)
Weight 3.1 kg (6.8 lb)
Warranty 2 Years