Overview
The Spectra Precision CTO-GL710 Single Grade Laser Package represents the ideal entry point for contractors demanding professional-grade accuracy without the complexity of dual-slope systems. This complete kit pairs the GL710 automatic self-leveling laser with the HL700 laser receiver, delivering reliable single-axis slope control for drainage, utility installation, and foundational grading work. With an operational range extending to 3,000 feet diameter and grade capability from -0.5% to 25%, the GL710 provides the precision and versatility needed for demanding construction environments while maintaining the simplicity that keeps crews productive throughout the workday.
Built on Spectra Precision's decades of laser level engineering, the GL710 features automatic self-leveling that eliminates time-consuming manual adjustments and reduces operator error. The included HL700 receiver provides clear visual and audible grade indicators, allowing single-operator efficiency on trenching and grading applications. Whether you're establishing drainage slopes for commercial foundations, setting consistent grades for underground utilities, or controlling excavation depth on site development projects, this package delivers professional results with straightforward operation that minimizes training time and maximizes jobsite productivity.
Key Specifications
- Leveling Range: ±5 degrees automatic self-leveling
- Grade Range: -0.5% to 25% single-axis slope capability
- Accuracy: ±3/32 inch at 100 feet (±2.5mm at 30m)
- Operating Range: Up to 3,000 feet diameter (915m) with HL700 receiver
- Rotation Speed: 600 RPM for extended range and bright visibility
- Power Source: Rechargeable NiMH battery with AC adapter included
- Runtime: Up to 40 hours on single charge
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Durability Rating: IP66 dust and water resistance
- Receiver Detection Window: 5.5 inches for accurate grade finding
What's in the Kit
- GL710 Single Grade Rotating Laser with automatic leveling
- HL700 Laser Receiver with rod clamp
- RC702 Remote Control for grade adjustments from receiver location
- Rechargeable NiMH Battery Pack
- 110V AC Battery Charger
- Soft Carrying Case for laser transport and storage
- Hard-Shell Carrying Case for complete system protection
- Operating Manual and Quick Start Guide
Job Applications
- Foundation Drainage and Footing Excavation: The GL710's single-slope capability makes it ideal for establishing proper drainage grades around building foundations and excavating to consistent depth for footing pours. The -0.5% to 25% grade range handles everything from subtle drainage slopes to steep utility runs, while 3,000-foot range covers large foundation perimeters without repositioning.
- Utility Trenching and Underground Installation: Sewer lines, storm drains, and underground utilities demand consistent fall for proper function. The GL710 ensures accurate grade maintenance throughout long trench runs, while the HL700 receiver mounts directly to excavator buckets or grade rods for real-time depth verification that keeps excavation on-grade and prevents costly over-digging.
- Site Grading and Rough Excavation: During initial site development, the GL710 establishes benchmark elevations and maintains consistent slopes for rough grading operations. The automatic self-leveling compensates for minor equipment movement or settling, maintaining accuracy without constant re-setup, which is critical for keeping large earthmoving operations productive.
- Concrete Slab Preparation and Flatwork: Before pouring parking lots, warehouse floors, or sidewalks, the GL710 helps verify subgrade elevation and establish formwork heights. The high-visibility rotating beam works effectively in bright outdoor conditions, and the HL700 receiver provides precise elevation verification across the entire pour area.
- Agricultural Drainage and Land Leveling: Farm drainage tile installation, field leveling, and irrigation grade work benefit from the GL710's extended 3,000-foot range and simple single-slope operation. The rugged IP66-rated construction withstands dusty field conditions, while long battery life supports full-day operation without recharging interruptions.
- Machine Control and Excavator Grade Monitoring: When mounted on excavators, dozers, or grading equipment, the HL700 receiver provides operators with real-time grade information, reducing reliance on ground personnel for grade checking. This single-operator capability significantly improves productivity on trenching and grading applications while maintaining consistent accuracy.
Compatible Accessories
- Spectra Precision HR320 Receiver: Upgraded receiver with digital readout and finer detection accuracy for precision applications
- Laser Detector Rod Clamps: Universal mounting brackets for various grade rod configurations
- Heavy-Duty Tripod: Stable platform for uneven terrain and windy conditions
- Rotating Laser Detector Mast: Extended-height mounting for visibility over obstacles
- Remote Control Holder: Belt clip and protective case for RC702 remote
- Additional Battery Packs: Spare NiMH batteries for extended runtime on long projects
- 12V Vehicle Charger: Charge batteries from truck power between job locations
- Laser Enhancement Glasses: Improve beam visibility in bright sunlight conditions
Related Guides
- Complete Rotating Laser Buyer's Guide
- Understanding Laser Level Accuracy and Range
- Calculating Proper Drainage Grades for Construction
- How to Use Laser Receivers for Grade Control
FAQ
- What's the difference between single-grade and dual-grade lasers?
- Single-grade lasers like the GL710 create slope along one axis while maintaining level on the perpendicular axis—ideal for trenching, drainage, and most grading work. Dual-grade lasers can slope in two directions simultaneously, necessary for complex drainage planes or large paving projects. For utility work, foundation drainage, and general excavation, the single-grade GL710 provides all the capability needed at a more accessible price point.
- How far can the GL710 work in bright sunlight?
- The GL710 laser is effective to 3,000 feet diameter when used with the HL700 receiver. In bright sunlight, the practical range depends on receiver sensitivity and ambient conditions, but the HL700 typically maintains reliable detection to 1,500+ feet radius. For maximum visibility in bright conditions, laser enhancement glasses help operators see the beam for initial setup and alignment verification.
- Can I use this laser for indoor finish work or just outdoor grading?
- While the GL710 excels at outdoor construction grading, it's equally effective for large indoor applications like warehouse floor preparation, interior drainage systems, and commercial foundation work. The rotating beam covers 360 degrees, making it efficient for interior layout. However, for finish carpentry or interior trim work where precision beyond ±3/32" at 100 feet is required, a dedicated line laser or precision rotary laser would be more appropriate.
- How long does the battery last and can I run it on AC power continuously?
- The included rechargeable NiMH battery provides up to 40 hours of continuous operation, easily handling multiple workdays between charges. Yes, the GL710 can run indefinitely on AC power using the included adapter, which is ideal for long-duration projects near power sources. Many contractors keep the laser on AC power for extended pours or grading operations while keeping a charged spare battery ready for remote locations.
