The Spectra Precision GL412N-1 is a complete, job-ready single slope grade laser system engineered for contractors who need reliable grade control from the moment they arrive on site. Bundled with the CR700 machine-control-ready receiver, a tenths-graduated leveling rod, tripod, and rugged carrying case, the GL412N-1 kit removes the guesswork from accessory sourcing and gets your crew working faster. Whether you're cutting storm sewer trenches, grading parking lots, or finishing athletic fields, this system delivers the accuracy and range professional drainage work demands.
System Overview & Jobsite Applications
The GL412N-1 pairs Spectra's proven GL412N transmitter with a field-matched accessory bundle optimized for single-slope grading tasks. The laser projects a rotating red beam across jobsites up to 2,000 feet in diameter, with grade capability from -10% to +25%. An intuitive keypad and large LCD display let operators dial in precise grade settings without referencing a manual, while the dual-axis self-leveling system compensates for minor setup variations automatically. The CR700 receiver mounts directly to excavator buckets, laser-guided machine heads, or hand-held rods for versatile use across multiple crew members and machines.
Key Specifications
- Model: Spectra Precision GL412N-1
- Laser Type: Red beam, Class IIIa
- Working Diameter: Up to 2,000 ft (610 m)
- Grade Range: -10% to +25%
- Grade Accuracy: ±1.5 arc seconds (±0.026 mm/m)
- Self-Leveling Range: ±5°
- Rotation Speed: 100, 300, 600 RPM selectable
- Battery Life: Up to 100 hours (alkaline D-cell)
- IP Rating: IP66 — dust-tight and water-resistant
- Operating Temperature: -4°F to 131°F (-20°C to 55°C)
What's in the Kit
- GL412N Grade Laser Transmitter — single slope, red beam rotating laser
- CR700 Receiver — machine-control compatible, 1.2" catch zone, audible and LED grade indication
- Tenths-Graduated Leveling Rod — pre-marked in 0.1 ft increments for direct grade reading
- Tripod — heavy-duty aluminum, suitable for rough terrain setups
- Carrying Case — molded foam interior protects all kit components during transport
- D-Cell Batteries — included for immediate first use
Job Applications
Storm & Sanitary Sewer Installation: Set precise invert grades for pipe runs with confidence. The GL412N's grade range and CR700's tight catch window keep trench bottoms on spec without constant re-checking by a supervisor.
Driveway & Parking Lot Grading: Dial in cross-slope and longitudinal grades for positive drainage. The selectable rotation speed at 600 RPM gives machine operators a fast, consistent beam reference across wide paving areas.
Athletic Field Construction: Sports fields demand exacting crown and runoff grades. The GL412N-1's ±1.5 arc-second accuracy keeps finish grades tight enough to satisfy agronomic and athletic surface specifications.
Site Prep & Cut/Fill Operations: Use the CR700 mounted directly on a dozer or grader blade for real-time machine guidance, reducing the number of passes needed to hit subgrade and saving fuel costs on large earthwork projects.
Compatible Accessories
- Spectra CR700 Replacement Receiver
- Spectra HL760 Heavy-Duty Receiver for Machine Control
- Spectra HR320 Remote Display
- Spectra RC804 Remote Control
- Aluminum Grade Rod — 13 ft Tenths
- Pipe Laser Adapter Bracket
Related Guides
- How to Set Up a Grade Laser for Drainage Work
- Single Slope vs. Dual Slope Lasers: Which Do You Need?
- Using the CR700 Receiver for Machine-Mounted Grade Control
- Grade Laser Accuracy Guide: Understanding Arc Seconds in the Field
Frequently Asked Questions
- Can the GL412N-1 be upgraded to dual slope later?
- No. The GL412N is a single slope unit only. If your projects require simultaneous X and Y axis grade control, consider the Spectra GL422N-1, which supports true dual slope operation. The GL412N-1 is the right choice when you're working with one consistent grade direction, such as pipe runs or crowned roadways.
- Is the CR700 receiver compatible with excavators and dozers?
- Yes. The CR700 is machine-control ready and includes a standard bracket for mounting to excavator buckets, dozer blades, and motor grader blades. It communicates grade position via audible tones and a large LED bar display visible in daylight from the cab.
- What is the maximum grade this laser can project?
- The GL412N supports grade settings from -10% to +25%, covering the vast majority of site drainage, pipe installation, and earthwork grading applications encountered in commercial and residential construction.
- How long will the batteries last in the field?
- Powered by standard D-cell alkaline batteries, the GL412N delivers up to 100 hours of continuous operation — roughly two to three full work weeks before a battery change. This eliminates the need for charging stations on remote sites where power access is limited.
