Spectra Precision GL422N-17 Dual Grade Laser Package w/ HL760 Receiver, TENTHS-Rod and Tripod

Overview

The Spectra Precision GL422N-17 Dual Grade Laser Package represents the pinnacle of grading technology for professional contractors who demand precision, versatility, and reliability on every jobsite. This comprehensive system is engineered for excavation contractors, concrete professionals, site development companies, and civil construction crews who work with complex grading applications that require accurate dual-axis slope control.

What sets the GL422N apart from conventional single-grade lasers is its ability to create simultaneous slopes on both the X and Y axes, with a range from -10% to +15% on each axis. This dual-slope capability enables contractors to establish sophisticated drainage patterns, parking lot cross-slopes, building pad grades, and multi-directional surface profiles with a single laser setup. The result is dramatically reduced setup time, fewer instrument moves, and increased productivity on projects where traditional methods would require multiple setups or manual grade calculations.

Contractors choose the GL422N-17 package because it delivers a complete, job-ready solution. Beyond the advanced laser transmitter itself, this package includes the feature-rich HL760 digital readout receiver with GradeMatch, PlaneLok, and Fingerprint technology, a GR151 tenths-graduated grade rod for easy decimal readings, a professional 2161 aluminum tripod, the RC402N full-function remote control, and rechargeable battery systems for both laser and receiver. The IP66 environmental rating ensures reliable performance in the dust, mud, and weather conditions common to construction sites, while the 2600-foot diameter range provides coverage for large-scale projects.

This system is the go-to choice for professionals working on commercial site development, highway construction, athletic field grading, plaza and parking structure drainage, foundation excavation, and utility installation. Whether you're a grading contractor establishing building pads, a concrete crew setting complex floor slopes, or a utility contractor laying pipe with precise grade control, the GL422N-17 provides the accuracy and efficiency needed to complete projects faster and more profitably.

Key Specifications

• Dual-axis grade range: -10% to +15% on both X and Y axes independently
• Working diameter: 2600 feet (800 meters) with HL760 receiver
• Accuracy: ±1/16 inch at 100 feet (±0.8mm at 30m)
• Self-leveling range: ±5 degrees on both axes
• Environmental rating: IP66 (dust-tight and protected against heavy seas)
• Operating temperature: -4°F to 122°F (-20°C to 50°C)
• Power source: Rechargeable NiMH battery pack (included)
• Battery life: 60+ hours on single charge
• Remote control range: Up to 1000 feet with RC402N
• Receiver detection window: 70mm height
• Receiver accuracy: ±1/16 inch (±1.5mm) digital readout
• Grade rod: GR151 tenths-graduated (decimal feet), telescoping to 16.4 feet
• Tripod: 2161 aluminum, adjustable height with quick-release mount
• Rotation speed: 600 RPM (variable)
• Leveling method: Automatic electronic leveling system
• Beam type: Class 2 visible red laser diode

What's in the Kit

The GL422N-17 complete package includes all the essential components needed to begin precision grading work immediately upon delivery:

• GL422N Dual Grade Laser: Main transmitter unit with dual-axis grade capability and automatic leveling
• HL760 Digital Receiver: Premium receiver with LCD display, GradeMatch, PlaneLok, and Fingerprint technologies
• RC402N Remote Control: Full-function wireless remote for one-person laser operation
• GR151 Grade Rod: Tenths-graduated aluminum grade rod extending to 16.4 feet with built-in receiver mount
• 2161 Aluminum Tripod: Professional-grade adjustable tripod with quick-release laser mount
• Rechargeable Battery Pack (Laser): NiMH battery system providing 60+ hours runtime
• Rechargeable Battery Pack (Receiver): Dedicated battery for HL760 receiver
• Battery Charger: Dual-bay charger for simultaneous charging
• Protective Carrying Cases: Hard-shell case for laser, soft cases for accessories
• User Manuals: Comprehensive operation guides for all system components
• Calibration Certificate: Factory calibration documentation

Job Applications

The Spectra GL422N-17 excels across a wide spectrum of professional construction applications:

Building Pad Grading: Establish precise building pads with proper drainage slopes away from the structure in multiple directions simultaneously. The dual-grade capability allows you to create crown or valley configurations that direct water flow exactly where needed, eliminating standing water and ensuring proper site drainage from the foundation phase forward.

Parking Lot and Pavement Construction: Set accurate cross-slopes and longitudinal grades for parking lots, roadways, and paved surfaces. Create the subtle crown profiles needed for effective surface drainage while maintaining the grade tolerances required for ADA compliance and professional paving work. The long range allows coverage of large parking areas from a single setup.

Athletic Field and Sports Surface Grading: Grade athletic fields, golf courses, and recreational surfaces with the precise drainage patterns needed for turf health and playability. Establish the crown profiles used in baseball and softball fields, or create the multi-directional slopes required for soccer and football field drainage systems.

Commercial Floor Slabs with Drainage: Set accurate slopes for commercial kitchen floors, loading docks, wash-down areas, and other concrete surfaces requiring positive drainage to floor drains. The GradeMatch feature on the HL760 receiver displays exact grade percentages, ensuring compliance with plumbing code requirements for floor slopes.

Utility Trenching and Pipe Installation: Use single-axis mode for establishing consistent grades for storm sewer, sanitary sewer, and utility line installation. The accuracy and range of the GL422N make it ideal for long pipe runs where maintaining precise grade is critical for proper flow and system performance.

Foundation Excavation: Control excavation depths and establish accurate bottom-of-footing elevations for building foundations. The dual-grade capability is particularly valuable for sloped sites where the foundation must follow existing terrain while maintaining proper building elevations.

Compatible Accessories

Enhance and protect your GL422N-17 system with these compatible accessories available from Express Tools:

• Spectra RC602N Remote Control - Upgraded remote with extended range and enhanced functions
• Spectra HR550 Receiver - Standard receiver for basic applications without digital readout
• Spectra HL700 Receiver - Additional digital receiver for two-person crews
• Universal Laser Detector Clamp - Machine-mount clamp for blade or bucket control
• Grade Rod Extensions - Extend reach for deep excavations
• Heavy-Duty Laser Tripod - Reinforced tripod for high-traffic areas
• Laser Target Panel - For layout and alignment applications
• Replacement NiMH Battery Packs - Keep spare batteries charged and ready
• Laser Safety Glasses - ANSI-rated eye protection for laser work

Related Guides

• How to Set Up and Use a Dual Grade Laser - Step-by-step tutorial for dual-slope applications
• Grading Laser Buying Guide - Compare single vs. dual grade systems
• Laser Level Accuracy and Calibration Guide - Maintain peak performance
• Construction Laser Safety Best Practices - OSHA compliance and safe operation

Frequently Asked Questions

What is the difference between single and dual grade lasers?

Single grade lasers create a sloped plane in one direction only, meaning they can establish a simple grade along one axis while remaining level on the perpendicular axis. The GL422N dual grade laser can create slopes on both X and Y axes simultaneously, with independent control of each axis from -10% to +15%. This allows you to establish complex drainage patterns, parking lot cross-slopes, and multi-directional grades with a single laser setup, saving significant time on projects requiring compound slopes. For example, you can create a parking lot surface that slopes toward a drain located at one corner, or establish a building pad that sheds water in multiple directions.

What is the accuracy of the GL422N-17 laser and is it suitable for commercial work?

The Spectra GL422N provides accuracy of ±1/16 inch at 100 feet (±0.8mm at 30m) in both axes, which exceeds the requirements for virtually all commercial grading, concrete, and site work applications. This level of precision is ideal for professional grading, foundation work, drainage applications, and paving where accurate elevation control is critical. The HL760 receiver adds ±1/16 inch digital readout accuracy, giving you combined system accuracy that meets or exceeds industry standards for construction layout and grade control.

How does the HL760 receiver's GradeMatch feature work and why is it beneficial?

GradeMatch is an advanced feature that automatically calculates and displays the actual grade percentage based on the laser plane and your current position on the grade rod. As you move the receiver up or down the rod, GradeMatch continuously shows whether you're above or below grade and by what percentage. This eliminates the need for manual grade calculations, reduces errors caused by math mistakes, and speeds up the grading process by providing instant feedback. For contractors working with plan specifications that call for specific grade percentages (like 2% slopes for drainage), GradeMatch ensures you're achieving exactly what's required without calculation.

Can I use this laser for pipe laying applications or is it only for surface grading?

Yes, the GL422N-17 is excellent for pipe laser work and utility installation. While it's designed as a dual-grade laser for surface applications, it can operate in single-axis mode to establish consistent pipe slopes for sewer, storm drain, and utility line installation. The system's ±1/16 inch accuracy at 100 feet and 2600-foot range make it suitable for long pipe runs where precise grade control is essential for proper flow. Many contractors use the same laser for both surface grading and underground utility work, maximizing their equipment investment. The HL760 receiver's narrow detection window and digital readout provide the precision needed for pipe grade work.