Spectra Precision GL412N Single Grade Laser w/ HL760 Laserometer

Overview

The Spectra Precision GL412N single-slope grade laser delivers professional-grade control for contractors who demand accuracy on finish grading, drainage, and concrete projects. This dual-beam system projects both horizontal and vertical red laser planes simultaneously, enabling precise slope verification and grade establishment without rotating components. The included HL760 digital laserometer provides millimeter-accurate elevation readings up to 2,600 feet (800m), making this combination ideal for large-scale commercial grading, parking lot construction, and agricultural land leveling. Unlike rotary laser systems, the GL412N's fixed-beam design eliminates calibration drift during operation and provides instant visual reference across the entire work area. The rugged IP67-rated housing withstands jobsite conditions including dust, moisture, and accidental submersion, while maintaining ±1/16-inch accuracy at 100 feet. Contractors gain significant productivity advantages through simultaneous dual-plane projection, reducing setup time and equipment repositioning on complex grade control applications.

Key Specifications

• Accuracy: ±1/16 inch at 100 feet (±1.5mm at 30m)
• Working Range: Up to 2,600 feet (800m) diameter with HL760 receiver
• Beam Type: Dual red laser (horizontal and vertical planes)
• Grade Range: -10% to +15% dual-axis slope capability
• Self-Leveling Range: ±5 degrees with automatic shutdown beyond limits
• Environmental Rating: IP67 dust-tight and waterproof protection
• Operating Temperature: -4°F to 122°F (-20°C to 50°C)
• Power: Rechargeable NiMH battery with 50+ hour runtime
• Receiver Accuracy: HL760 displays elevations to ±1mm resolution
• Thread Mount: 5/8-inch x 11 TPI for tripods and poles

What's in the Kit

• GL412N dual-slope grade laser transmitter
• HL760 digital laserometer receiver with rod clamp
• Rechargeable NiMH battery pack
• AC battery charger with regional adapters
• Soft carrying case for laser transmitter
• HL760 protective hard case
• Operator's manual and quick-start guide
• Manufacturer's 3-year warranty registration card

Job Applications

• Parking Lot and Pavement Grading: Dual-plane projection allows simultaneous monitoring of longitudinal slope and cross-fall drainage, ensuring proper water runoff without constant instrument repositioning across large asphalt paving operations.
• Building Pad Preparation: The fixed vertical beam establishes elevation benchmarks for excavation depth control while the horizontal plane verifies level foundation areas, reducing survey crew callbacks and accelerating site preparation schedules.
• Agricultural Field Leveling: Extended 2,600-foot range with the HL760 receiver covers large irrigation fields in single setups, maintaining precise grades for optimal water distribution on laser-guided land planes and scrapers.
• Drainage Channel Installation: Programmable slope percentages between -10% and +15% provide accurate grade control for swale construction, French drains, and stormwater management systems requiring specific pitch requirements.
• Concrete Slab Screeding: The horizontal red beam provides continuous visual reference for screed rail setup and wet concrete finishing, eliminating the need for string lines on warehouse floors and residential foundation slabs.
• Sports Field Construction: Dual-axis slope capability enables complex crown and drainage patterns on athletic fields, ensuring proper surface water management while meeting tournament-grade flatness specifications for baseball diamonds and soccer pitches.

Compatible Accessories

Spectra HL760 Digital Laserometer | Spectra HD250 Machine Receiver | Heavy-Duty Aluminum Laser Tripod | 25-Foot Telescoping Grade Rod | Spectra RC803 Remote Control | Replacement NiMH Battery Pack

Related Guides

Grade Laser Setup Best Practices for Construction Sites
Single-Beam vs. Rotary Lasers: Which System for Your Application
Understanding Laser Receiver Accuracy and Range Factors
Troubleshooting Grade Laser Calibration and Leveling Issues

Frequently Asked Questions

What's the actual working range I can expect on typical grading jobs with the HL760 receiver?

Under normal daylight conditions, expect reliable detection at 1,200-1,500 feet radius from the laser. The rated 2,600-foot diameter range (1,300-foot radius) is achievable in low-light conditions or when using the receiver in narrow detection mode. Bright sunlight, dust, and heat shimmer reduce effective range. For most commercial grading operations, plan equipment setups assuming 1,000-foot practical working radius to maintain consistent accuracy and signal strength throughout the day.

Can the GL412N project compound slopes for applications like crowned parking lots?

Yes, the GL412N features dual-axis slope capability, allowing you to set independent grade percentages on both the X and Y axes simultaneously. This creates compound slopes essential for crowned roadways, parking lot drainage patterns, and athletic field construction. The slope range is -10% to +15% on each axis, and grades are set independently using the control panel with 0.01% resolution for precise drainage design implementation.

How does the fixed-beam design compare to rotary lasers for grade control accuracy?

Fixed-beam lasers like the GL412N eliminate accuracy drift caused by rotating head mechanisms. Rotary systems can develop slight calibration shifts as motors wear or after impacts, requiring periodic recalibration. The GL412N's stationary beam maintains factory calibration longer and provides continuous plane visibility rather than scanning pulses. However, rotary lasers offer true 360-degree coverage. For linear applications like drainage channels, roadways, or building pads where work occurs primarily along one or two axes, fixed-beam systems provide superior stability and don't require the receiver to catch intermittent rotating signals.

What's the difference between the HL760 receiver included in this kit versus machine-mount receivers?

The HL760 is a handheld digital laserometer designed for grade rod mounting and manual elevation measurements, displaying numeric elevation differences to 1mm resolution. Machine receivers like the HD250 mount directly on excavator blades, dozers, or motor graders, providing real-time cut/fill guidance through LED indicators or cab displays for automated grade control. The HL760 excels at spot-checking elevations, setting forms, and verifying finished grades. For machine control applications, you'd add a compatible machine receiver to the system while keeping the HL760 for manual verification and quality control checks.