Single Slope Grade Laser Built for Drainage, Grading, and Earthworks
The Spectra Precision GL412N-NR is a professional-grade single slope rotating laser designed for contractors who need reliable, repeatable grade control on drainage, utility, and site preparation projects. Equipped with automated slope matching and a working range of up to 2,000 feet in diameter, the GL412N-NR eliminates the guesswork from establishing consistent fall across a job site. This package includes the HL760 laser receiver, giving your crew everything needed to get working right out of the case.
Jobsite Overview and Applications
Whether you are grading a parking lot, cutting a swale, laying storm drain pipe, or preparing a foundation pad, the GL412N-NR delivers the automated grade control that keeps work moving. The single axis slope function lets operators dial in a precise fall rate and lock it in — the laser maintains that grade automatically even as the instrument self-levels. Designed for outdoor use in demanding conditions, the GL412N-NR carries an IP66 rating for dust and water resistance, making it a dependable tool on active earthwork sites.
Key Specifications
- Laser Type: Single slope rotating laser level
- Slope Range: 0% to 25% on X-axis
- Working Diameter: Up to 2,000 ft (610 m) with receiver
- Self-Leveling Range: ±5°
- Leveling Accuracy: ±1.5 arc seconds (automatic)
- Rotation Speed: 100, 300, or 600 RPM selectable
- Laser Class: Class 3R, 635nm visible red
- Weather Protection: IP66 dust and water resistant
- Battery Life: Up to 100 hours (4 x AA alkaline)
- Operating Temperature: -20°C to +50°C (-4°F to 122°F)
- Included Receiver: HL760 laser receiver
Key Features
- Automated single axis slope control — set grade and lock it in without manual adjustment
- Remote control ready — compatible with CR600 remote for grade changes from the machine cab
- Out-of-level alarm shuts down rotation if the instrument is disturbed, preventing grade errors
- Grade Matching function captures existing slope from a reference surface automatically
- Selectable rotation speeds optimize performance for short-range finish work or long-range earthmoving
- HL760 receiver provides large detection window and audible/visual on-grade indication
- Rugged die-cast housing with IP66 rating withstands rain, dust, and jobsite vibration
- Compatible with Spectra machine control systems for grader and dozer applications
Job Applications
Parking Lot and Pavement Grading: Establish a single consistent cross-slope or longitudinal grade across asphalt and concrete paving projects, ensuring positive drainage to catch basins without ponding.
Storm Drain and Utility Trenching: Maintain precise pipe fall rates on storm sewer, sanitary, and irrigation installations where grade tolerances are specified to fractions of a percent.
Site Preparation and Pad Grading: Grade building pads, athletic fields, and landscaping areas to a uniform slope for drainage compliance and surface stability.
Agricultural and Land Drainage: Set accurate fall on irrigation channels, drainage swales, and field leveling projects where consistent slope across long distances is essential to performance.
Compatible Accessories
- CR600 Remote Control for GL400 Series Lasers
- HL760 Replacement Laser Receiver
- Spectra Grade Rod and Receiver Bracket
- Tripod for Rotating Laser Levels
- Spectra GL412N Carrying Case (Replacement)
Related Guides
- How to Set Single Slope Grade with the Spectra GL412N-NR
- GL412N-NR vs GL422N: Which Spectra Grade Laser Is Right for Your Project?
- Using a Rotating Laser for Drainage and Pipe Grading
- Laser Level Buyer's Guide for Grading Contractors
Frequently Asked Questions
- Does the GL412N-NR include a receiver?
- Yes. This NR package includes the Spectra Precision HL760 laser receiver, which provides a large detection window and clear on-grade indication for rod work and machine mounting.
- Can the GL412N-NR be used with a machine control system?
- The GL412N-NR is compatible with Spectra Precision machine control systems and supports the CR600 remote control, allowing grade adjustments from a grader or dozer cab without stopping work.
- What is the maximum slope the GL412N-NR can set?
- The GL412N-NR handles slopes from 0% up to 25% on the X-axis, covering the full range of grades encountered in drainage, paving, and earthworks applications.
- How long do the batteries last on the GL412N-NR?
- Running on four standard AA alkaline batteries, the GL412N-NR delivers up to 100 hours of operating time, reducing the need for recharging or battery swaps during extended shifts.
