The Spectra GL1425C-1 is a professional-grade dual slope laser package built for contractors who need accurate, repeatable grade control from the first day on the job. Whether you're cutting drainage slopes, establishing building pads, or setting subgrade on a commercial site, this complete kit ships ready to work — no hunting for accessories, no compatibility guesswork. It's a turnkey solution trusted by grading crews, site contractors, and civil construction professionals across the industry.
Overview & Jobsite Applications
The GL1425C-1 delivers single and dual axis grade capability in one compact, self-leveling unit. The laser automatically levels its horizontal plane and then applies user-set slopes on one or both axes simultaneously — a critical advantage when working on crowned roadways, parking lots with cross-fall, or building pads that drain in two directions. With a working range of up to 2,200 feet in diameter and an operational accuracy of ±1/16 inch at 100 feet, this unit performs on small residential lots and large commercial sites alike. The included rechargeable battery system eliminates the ongoing cost and hassle of disposables, and the rugged housing handles the vibration and dust exposure typical of active grading operations.
Key Specifications
- Grade Range: ±10% on both axes simultaneously
- Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
- Self-Leveling Range: ±5°
- Working Diameter: Up to 2,200 ft (670 m) with receiver
- Rotation Speed: 100, 300, and 600 RPM selectable
- Beam Type: Horizontal and vertical reference beams
- Power: Rechargeable NiMH battery pack included
- IP Rating: Weather-resistant construction for outdoor use
- Display: Digital grade readout on unit
What's in the Kit
- Spectra GL1425C-1 Dual Slope Rotating Grade Laser
- CR700 Laser Receiver with clamp
- Tenths-Graduated Grade Rod for precise elevation readings
- Heavy-Duty Adjustable Tripod for stable setup on uneven ground
- Large System Hard Case for protected transport and storage
- Rechargeable NiMH Battery Pack and charger
- Operator's manual and documentation
Job Applications
Drainage & Site Grading: Set dual slopes across a parking lot or detention basin floor with one setup. The GL1425C-1 holds both X and Y axis grades simultaneously so your blade or scraper operator gets a consistent grade signal without resetting the instrument.
Building Pad Preparation: Establish crowned or tilted concrete slabs and compacted subbase with confidence. The digital grade display lets you dial in exact percentages quickly, reducing layout time before the pour.
Road & Driveway Construction: Apply cross-slope to roadbeds and driveways to meet design specifications and drainage requirements. The 600 RPM rotation speed keeps the CR700 receiver responsive even on fast-moving motor graders.
Underground Utility & Pipeline Slope: Use the vertical beam and grade function together to set invert elevations on gravity sewer, storm drain, and other slope-critical pipe installations where fall-per-foot accuracy matters.
Compatible Accessories
- Spectra CR700 Replacement Receiver
- Rechargeable Battery Pack for GL Series Lasers
- Heavy-Duty Machine Mounting Bracket
- Aluminum Grade Rod Extensions
- Spectra Laser Detector Holder / Rod Clamp
Related Guides
- How to Set Dual Slope with a Rotating Grade Laser
- Grade Laser vs. Pipe Laser: Choosing the Right Tool
- Using a Laser Receiver on a Motor Grader
- Grade Laser Package Comparison: GL1425C-1 vs. GL422N
Frequently Asked Questions
- Can the GL1425C-1 set grade on two axes at the same time?
- Yes. The GL1425C-1 is a true dual slope laser, meaning it can apply independent grade percentages on both the X and Y axes simultaneously. This makes it ideal for crowned roads, sloped building pads, and any surface that must drain in two directions at once.
- What receiver is included, and is it compatible with other Spectra lasers?
- The package includes the Spectra CR700 receiver. The CR700 is compatible with a wide range of Spectra rotating lasers and provides a large detection window for use on grade rods or machine-mounted brackets. It displays above, on-grade, and below signals with both audible and visual indicators.
- Does this package include everything needed to start working on site?
- Yes. The GL1425C-1 package includes the laser, CR700 receiver, tenths-graduated grade rod, adjustable tripod, rechargeable battery pack with charger, and a hard carrying case. No additional purchases are required to begin grade work on arrival.
- How accurate is the GL1425C-1 for finish grading work?
- The GL1425C-1 delivers an accuracy of ±1/16 inch at 100 feet under normal operating conditions. This level of precision is suitable for finish grading on building pads, parking lots, and athletic fields where tight tolerances are specified.
Frequently Asked Questions
Can the GL1425C-1 set grade on two axes at the same time?
Yes. The GL1425C-1 is a true dual slope laser, meaning it can apply independent grade percentages on both the X and Y axes simultaneously. This makes it ideal for crowned roads, sloped building pads, and any surface that must drain in two directions at once.
What receiver is included, and is it compatible with other Spectra lasers?
The package includes the Spectra CR700 receiver. The CR700 is compatible with a wide range of Spectra rotating lasers and provides a large detection window for use on grade rods or machine-mounted brackets. It displays above, on-grade, and below signals with both audible and visual indicators.
Does this package include everything needed to start working on site?
Yes. The GL1425C-1 package includes the laser, CR700 receiver, tenths-graduated grade rod, adjustable tripod, rechargeable battery pack with charger, and a hard carrying case. No additional purchases are required to begin grade work on arrival.
How accurate is the GL1425C-1 for finish grading work?
The GL1425C-1 delivers an accuracy of ±1/16 inch at 100 feet under normal operating conditions. This level of precision is suitable for finish grading on building pads, parking lots, and athletic fields where tight tolerances are specified.
