Overview
The Spectra Precision GL722 Dual Grade Laser represents the pinnacle of laser-guided grading technology for professional contractors who demand precision, versatility, and efficiency on complex jobsites. This advanced dual-axis system simultaneously controls elevation and slope across two independent planes, enabling operators to tackle sophisticated drainage projects, multi-directional grading, and intricate slope work that would be prohibitively time-consuming with traditional single-grade lasers. The included RC703 radio remote control puts real-time grade adjustments directly in the hands of equipment operators up to 1,000 feet away, eliminating the need for ground crews to manually adjust the laser head and dramatically reducing downtime. Combined with the CR600 machine receiver, this complete package transforms excavators, dozers, and motor graders into precision grading machines capable of achieving accuracies within ±1/16 inch at 100 feet.
What sets the GL722 apart from conventional rotating lasers is its ability to create dual slopes simultaneously—think of it as having two laser levels working in perfect coordination from a single setup point. This capability proves invaluable for applications like parking lots with multi-directional drainage, agricultural land leveling with cross-slope requirements, building pads with compound grades, and road construction where crown and cross-slope must be established concurrently. The system's robust construction features advanced self-leveling technology, extreme temperature tolerance, and IP67-rated weather resistance, making it reliable in the harshest construction environments from sub-zero winter grading to scorching summer paving projects.
For contractors running GPS-guided equipment, the GL722 offers a cost-effective alternative or complement to satellite-based systems, particularly on smaller sites where GNSS setup overhead doesn't make economic sense or in areas with canopy coverage, signal obstruction, or challenging satellite geometry. The included RC703 remote control streamlines workflow by allowing machine operators to make precise X-axis and Y-axis slope adjustments without leaving the cab, while the CR600 receiver delivers reliable laser detection with visual and audible grade indicators that integrate seamlessly with modern machine control displays.
Key Specifications
- Laser Type: Dual-axis rotating laser with independent X and Y slope control
- Accuracy: ±1/16 inch at 100 feet (±0.8 mm at 30 m)
- Operating Range: Up to 2,600-foot diameter (800 m) with receiver
- Grade Range: -10% to +15% on both axes
- Self-Leveling Range: ±5 degrees with audible out-of-level alert
- Rotation Speed: 0, 300, 600, 900, 1200 RPM (variable)
- Remote Control Range: Up to 1,000 feet (300 m) line-of-sight with RC703
- Power Source: Rechargeable Li-ion battery (60+ hours runtime) or external 12V DC
- Environmental Rating: IP67 dust-tight and waterproof protection
- Operating Temperature: -20°F to 122°F (-29°C to 50°C)
- Receiver Channels: CR600 compatible with all standard laser detector rod mounts
- Display: Multi-function control panel with backlit LCD
What's in the Kit
- GL722 Dual Grade Laser transmitter with protective housing
- RC703 Radio Remote Control with belt clip and lanyard
- CR600 Machine Receiver with universal mounting bracket
- Rechargeable Lithium-ion battery pack with charger
- AC/DC power adapter and vehicle charging cable
- Heavy-duty carrying case with foam insert
- Operator manuals and quick-start guide
- Calibration certificate and warranty documentation
Job Applications
- Site Grading & Building Pads: Establish precise elevations and compound slopes for building foundations, ensuring proper drainage away from structures in multiple directions simultaneously, which is critical for preventing water infiltration and meeting municipal stormwater requirements.
- Parking Lot Construction: Create complex multi-directional drainage patterns that direct water flow toward collection points while maintaining ADA-compliant slopes, all from a single laser setup that would otherwise require multiple conventional laser positions and constant repositioning.
- Road & Highway Projects: Set road crown and cross-slope simultaneously for highway construction, rural road building, and subdivision streets where proper drainage is essential for pavement longevity and safety, reducing the need for stringline installation and grade checking.
- Agricultural Land Leveling: Achieve precise field grading for irrigation efficiency, drainage management, and crop yield optimization across large agricultural parcels where dual-slope capability allows for main slope plus cross-slope correction in a single pass.
- Drainage & Utility Work: Install storm drains, swales, and channel grading with precise fall rates, while the remote control capability allows the excavator operator to fine-tune grades in real-time as they encounter subsurface conditions without waiting for grade checker verification.
- Athletic Fields & Golf Courses: Create subtle, precise drainage slopes for sports fields, golf greens, and recreational areas where standing water cannot be tolerated and where aesthetic requirements demand smooth, imperceptible grade transitions.
Compatible Accessories
- Spectra Precision HR320 Handheld Laser Receiver for grade checking and layout verification
- Heavy-Duty Tripod with 5/8-11 thread mount for stable laser positioning
- Elevator Tripod for increased working height on tall fill projects
- Additional RC703 Remote Controls for multi-machine operations
- External 12V Battery Pack for extended runtime on long shifts
- Laser Enhancement Glasses for improved beam visibility in bright conditions
- Magnetic Machine Mounts for quick CR600 receiver repositioning
- Spectra Precision laser detectors (HL700, HL750, HL760) for versatile detection options
Related Guides
Complete Laser Level Buying Guide: Rotary vs. Dual Grade Systems
Machine Control Installation & Calibration Best Practices
Grading & Drainage Fundamentals for Site Contractors
Laser Level Maintenance & Accuracy Verification Procedures
FAQ
- What's the difference between single-grade and dual-grade lasers?
- A single-grade laser creates a single slope plane in one direction, requiring the laser to be repositioned for different slope orientations. The GL722 dual-grade system simultaneously controls two independent slopes (X-axis and Y-axis), allowing you to create compound grades—like a parking lot that slopes toward a corner drain or a building pad that drains in two directions—all from one setup position, saving substantial time on complex projects.
- Can I use this laser without the machine receiver for other applications?
- Absolutely. While the GL722 package includes the CR600 machine receiver for grade control on excavators and dozers, the laser itself functions as a standard rotating laser and can be used with handheld receivers, laser detectors on grade rods, or even pipe lasers applications. The dual-grade capability is always available whether you're doing machine control, hand grading, or layout work.
- How does the remote control improve productivity?
- The RC703 remote allows equipment operators to adjust laser slopes in real-time from up to 1,000 feet away without stopping work. Instead of shutting down equipment, walking to the laser, making adjustments, returning to the machine, and checking results—which can take 10-15 minutes per adjustment—operators make instant changes from the cab and immediately see results, keeping machines productive and eliminating the need for dedicated laser attendants.
- Is this laser accurate enough to replace GPS machine control?
- For many applications, yes. The GL722 delivers ±1/16 inch accuracy at 100 feet, which matches or exceeds typical GPS accuracy for grading work. It's particularly advantageous on smaller sites (under 5 acres), in areas with tree canopy or signal obstruction, for projects not requiring site-wide digital terrain models, or as a backup system. However, GPS offers advantages for very large sites, complex 3D designs, and situations requiring as-built documentation without additional surveying.
