Two Independent Slopes. One Powerful Laser.
The Spectra Precision GL422N-14-NR is a professional dual grade laser engineered for contractors who need simultaneous control of two independent slope axes on the same jobsite. Whether you're shaping complex drainage swales, establishing crowned road profiles, or grading multi-directional foundation pads, the GL422N delivers the precision and reliability that grade work demands. Paired with the CR700 machine-control-ready receiver, this system keeps pace with dynamic grading conditions where corrections happen in real time from the seat of the machine.
Dual Grade Laser Built for Complex Grading Applications
Unlike single-grade lasers that control slope along one axis, the GL422N-14 manages X and Y slopes independently—critical for projects where two planes intersect, such as parking lots with cross-fall, crowned roadways, and sloped slab pours. The red beam rotates at user-selectable speeds up to 600 RPM, and the integrated grade matching feature lets operators dial in existing slopes on the fly. Rechargeable battery operation keeps consumable costs low across long production days, and the rugged housing is built to survive the dust, vibration, and moisture of active cut-and-fill sites.
Key Specifications
- Model: GL422N-14-NR
- Grade Range: ±10% on both X and Y axes simultaneously
- Grade Increment: 0.001% (1:100,000)
- Beam Color: Red (visible)
- Rotation Speed: 100, 300, or 600 RPM selectable
- Working Range: Up to 800 m diameter with CR700 receiver
- Accuracy: ±1.5 mm at 30 m
- Self-Leveling Range: ±5°
- Power: Rechargeable NiMH battery pack (included)
- Battery Life: Up to 50 hours per charge
- IP Rating: IP66 dust and water resistant
- Receiver Included: CR700
What's in the Kit
- Spectra Precision GL422N dual grade laser transmitter
- CR700 machine-control-ready laser receiver with display
- Rechargeable NiMH battery pack
- Battery charger
- Carrying case
- User documentation and quick-start guide
Job Applications
Site Drainage & Retention Grading: Establish precise dual-slope profiles for detention basins, parking lot drainage, and site runoff management where X and Y grades must be controlled simultaneously to meet civil design tolerances.
Road and Driveway Crowning: Crown road profiles require opposing slopes from centerline—the GL422N handles both directions without repositioning, keeping motor grader passes consistent and reducing re-work.
Sloped Slab Pours: Concrete flatwork on warehouse floors, loading docks, and wash pads often requires multi-directional slope for drainage. The GL422N provides the repeatable grade reference concrete crews need from screeding through floating.
Athletic Field Grading: Sports turf installations demand precise, gentle cross-slopes across large flat areas. The dual grade capability and wide working range make the GL422N a natural fit for field grading contractors.
Compatible Accessories
- CR700 Replacement Receiver
- HL760 Hand-Held Rod Eye Receiver
- Spectra Tripod and Grade Rod Bundle
- NiMH Replacement Battery Pack for GL400 Series
- RC602 Remote Control for GL422N
- Spectra Heavy-Duty Laser Carrying Case
Related Guides
- How to Set Dual Slopes with the Spectra GL422N — Step-by-Step
- Single Grade vs. Dual Grade Lasers: Which Do You Need?
- Choosing the Right Laser Receiver for Machine Control
- GL400 Series Maintenance and Battery Care Tips
Frequently Asked Questions
- Can the GL422N-14-NR control two different slopes at the same time?
- Yes. The GL422N is specifically designed for dual grade operation, allowing you to set independent slope values on the X and Y axes simultaneously. This is ideal for crowned roads, complex drainage grades, and any application where two planes intersect.
- Is the CR700 receiver compatible with machine control systems?
- The CR700 is designed for use with dozers, motor graders, and other grade equipment. It provides fast response times and clear elevation feedback suitable for dynamic machine-mounted applications. Check your machine control system compatibility for direct integration requirements.
- What is the battery life on a single charge?
- The included rechargeable NiMH battery pack delivers up to 50 hours of continuous operation per charge, making it suitable for full production weeks between charges under normal field conditions.
- What is the working range of the GL422N-14-NR system?
- With the included CR700 receiver, the system has an effective working diameter of up to 800 meters (approximately 2,600 feet), making it well suited for large open grading sites, airfields, and expansive lot development projects.
