Overview
The Spectra Precision GL720 Dual Grade Laser Package represents a significant leap forward for contractors who demand precision and versatility on every job site. This professional-grade laser system seamlessly transitions between single-axis and dual-axis modes, allowing you to tackle everything from straightforward drainage slopes to intricate site preparation requiring simultaneous front-to-back and side-to-side grading. Unlike basic rotating lasers that limit you to flat planes or simple slopes, the GL720 empowers your crew to establish complex crown-and-cross-slope configurations with confidence and accuracy.
At the heart of this package is the GL720 laser transmitter paired with the intuitive HL700 receiver, creating a complete elevation management system that reduces guesswork and rework. The dual-grade capability means you can create sophisticated drainage patterns, parking lot crowns, and multi-directional slopes without repositioning equipment or performing complicated calculations. For contractors working on athletic fields, solar farms, large commercial sites, or any application where water management is critical, the GL720 delivers the control you need to meet grade specifications consistently.
What sets the GL720 apart is its practical approach to advanced grading. The system provides professional dual-grade functionality without overwhelming operators with unnecessary complexity. The HL700 receiver delivers clear, immediate elevation feedback that keeps your machine operators or grade checkers informed throughout the day. Whether you're a mid-size excavation contractor expanding your capabilities or an established grading operation seeking reliable backup equipment, this package offers exceptional value at $5,225, positioning advanced dual-grade technology within reach of operations that previously relied on single-grade systems or manual methods.
Key Specifications
- Operating Modes: Single-axis and dual-axis grade capability with easy mode switching
- Grade Range: Accommodates steep slopes and gentle drainage grades across both axes
- Rotation Speed: High-visibility beam detection optimized for construction environments
- Working Diameter: Extended range coverage suitable for large site work and open areas
- Accuracy: Professional-grade precision meeting commercial grading specifications
- Self-Leveling: Automatic leveling system with out-of-level alert protection
- Power System: Rechargeable battery operation with extended runtime for full-day use
- Durability Rating: Weather-resistant construction designed for demanding job site conditions
- Receiver Detection: HL700 compatible with visual and audible grade indication
- Control Interface: Intuitive grade input and mode selection for efficient setup
What's in the Kit
- GL720 Dual Grade Laser Transmitter with integrated dual-axis capability
- HL700 Handheld Laser Receiver with visual elevation display
- Rechargeable Battery Pack with integrated charging system
- Heavy-Duty Carrying Case protecting both transmitter and receiver during transport
- RC703 Remote Control for convenient grade adjustments from operator position
- Operating Manual and Quick Reference Guide for field use
- Calibration Documentation and warranty registration materials
Job Applications
- Parking Lot and Pavement Grading: Create proper drainage crowns that shed water to collection points, eliminating standing water and extending pavement life. The dual-grade capability lets you establish the front-to-back slope for overall drainage while simultaneously building the side-to-side crown, completing complex grading in a single pass.
- Athletic Field Construction: Achieve the precise multi-directional slopes required for synthetic and natural turf fields where drainage performance directly impacts playability and safety. The GL720 helps you meet the exacting specifications common in sports field construction without constant surveying and adjustment.
- Building Pad and Foundation Preparation: Establish accurate reference grades for site preparation, ensuring proper drainage away from structures. The dual-axis mode allows you to create pads that slope away from buildings in multiple directions, protecting foundations from water infiltration.
- Solar Farm and Large Commercial Sites: Cover expansive areas efficiently with consistent grade control across panels or sections. The extended working diameter and dual-grade capability reduce setup time on large projects where repositioning equipment impacts productivity and accuracy.
- Drainage Swale and Retention Basin Shaping: Form complex water management features with precisely controlled gradients in multiple directions. The ability to set independent slopes on both axes simplifies the creation of collection swales, retention areas, and controlled drainage channels.
- Agricultural Land Leveling and Improvement: Improve field drainage and irrigation efficiency with controlled surface grading. The GL720's versatility adapts to both large-scale field leveling and detailed grade work around structures and access roads, making it valuable for agricultural contractors.
Compatible Accessories
- Machine-Mounted Receivers: Upgrade to excavator or dozer-mounted sensor systems for fully automated grade control integration
- Extended Range Receivers: Alternative receiver options for specialized applications or operating preferences
- Laser Detector Clamps: Mounting solutions for attaching receivers to grade rods, stakes, or equipment
- Heavy-Duty Tripods: Stable laser mounting options for uneven terrain or elevated positioning requirements
- Additional Battery Packs: Spare power sources for extended projects or operations running multiple shifts
- Protective Covers and Rain Shields: Weather protection accessories for operation in challenging conditions
Related Guides
- How to Choose Between Single-Grade and Dual-Grade Laser Systems
- Laser Receiver Mounting Techniques for Different Applications
- Troubleshooting Grade Accuracy Issues on Construction Sites
- Maintenance and Calibration Best Practices for Rotating Lasers
FAQ
- What's the practical difference between using this in single-axis versus dual-axis mode?
- Single-axis mode functions like a traditional grade laser, creating a sloped plane in one direction—perfect for pipeline trenches, simple drainage, or any application needing slope in just one direction. Dual-axis mode adds a second, independent slope perpendicular to the first, allowing you to create crowns, complex drainage patterns, or surfaces that slope in two directions simultaneously. You'll use single-axis mode for probably 60-70% of typical excavation work, but having dual-axis capability available means you can handle sophisticated grading jobs without bringing in survey support or a more expensive laser system.
- Can I use the HL700 receiver with machine control systems, or is it only for handheld grade checking?
- The HL700 is primarily designed as a handheld receiver for manual grade checking—perfect for finish grade verification, spot-checking elevations, or guiding compact equipment without integrated systems. For full machine control integration on excavators or dozers, you'd upgrade to machine-mounted receiver systems that connect to your equipment's control console. Many contractors use the HL700 for grade checking and verification even when running machine control, making it valuable for quality control regardless of your equipment setup.
- How does setup time compare to using conventional surveying methods for complex grading work?
- For dual-grade applications like crowned parking lots or multi-slope pads, the GL720 typically reduces setup time by 50-75% compared to establishing multiple control points with conventional surveying. Instead of setting numerous grade stakes or continuously calculating elevation adjustments, you set your two slope values once, and the laser maintains that reference plane throughout the work area. The real time-savings extends beyond initial setup—operators get continuous grade reference without waiting for surveyors to check and reset stakes, dramatically improving productivity on grade-intensive projects.
- What's the realistic working range in typical construction conditions with dust and equipment vibration?
- In normal construction environments with moderate dust and typical equipment activity, you can reliably work within a 600-800 foot diameter from the laser position. Optimal range reaches further in ideal conditions, but practically speaking, most contractors position the laser to keep critical work areas within 300-400 feet for strongest signal and fastest grade response. Heavy dust, extreme brightness, or significant ground vibration will reduce effective range, which is why experienced operators position the laser considering site conditions rather than just maximum theoretical distance. For very large sites, plan on relocating the laser between work areas rather than pushing the extreme range limits.
