The Spectra Precision GL1425C-18 is a professional dual-slope grade laser engineered for highway, civil, and landscape grading crews who demand precision, range, and jobsite flexibility. With built-in Bluetooth connectivity, a high-visibility red beam, and full dual-axis slope capability, the GL1425C-18 lets operators dial in complex multi-plane grades from a remote device — reducing setup time and keeping crews productive across large sites.
Overview & Jobsite Applications
Designed to handle the toughest grading environments, the GL1425C-18 combines a robust self-leveling platform with Spectra's intuitive Bluetooth remote control app. Whether you're cutting highway subgrades, shaping retention pond slopes, or establishing finish grades on commercial pads, this laser delivers repeatable accuracy across its full working radius. The included CR700 multi-use receiver is compatible with both rod-mount and machine-control mounting configurations, making it equally at home in hand-grade and machine-grade workflows. The rechargeable 18V battery system and elevator tripod round out a complete field-ready kit.
Key Specifications
- Beam Color: Red
- Grade Range: ±25% on both axes simultaneously
- Leveling Accuracy: ±1.5 arc seconds (self-leveling)
- Working Radius: Up to 2,000 ft (600 m) diameter with CR700 receiver
- Self-Leveling Range: ±5°
- Rotation Speed: Variable, up to 600 RPM
- Connectivity: Bluetooth with Spectra Precision Layout app compatibility
- Power: Rechargeable 18V Li-Ion battery pack
- Battery Life: Up to 20 hours per charge
- IP Rating: IP66 — dust-tight and water jet resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
What's in the Kit
- Spectra Precision GL1425C-18 dual-slope grade laser head
- CR700 multi-use laser receiver with rod clamp
- Elevator tripod for quick height adjustments
- 18V rechargeable Li-Ion battery pack
- Battery charger
- Carrying case
- User manual and quick-start guide
Job Applications
Highway & Road Subgrade: Set dual cross-slopes and longitudinal grades simultaneously to match design drawings — Bluetooth remote lets the operator adjust grade values from the cab or rod position without returning to the instrument.
Retention Ponds & Drainage Channels: Establish consistent single- or dual-slope planes on detention basin floors and swale profiles where precise water-flow geometry is critical to drainage performance.
Commercial Site Pads: Control finish grade elevation across large paved areas with the high-range working radius of the CR700 receiver, keeping a single setup point productive on oversized commercial lots.
Landscape Grading & Sports Fields: Fine-tune complex crown and drainage slopes on athletic fields and landscaped berms using manual slope entry or app-based remote adjustment for repeatable results across multiple passes.
Compatible Accessories
- Spectra CR700 Laser Receiver (replacement/additional)
- Spectra HL760 Machine Control Receiver
- Spectra Elevator Tripod (heavy-duty replacement)
- 18V Replacement Battery Pack for GL Series
- Spectra Grade Rod — Fiberglass, 13 ft
- Spectra Laser Detector Rod Clamp — Universal
Related Guides
- How to Set Dual-Slope Grades with the GL1425C-18
- GL1425C-18 Bluetooth App Setup Guide
- Choosing the Right Grade Laser for Civil & Highway Projects
- CR700 Receiver Mounting Options: Rod vs. Machine Control
Frequently Asked Questions
- Can the GL1425C-18 set grades on both axes at the same time?
- Yes. The GL1425C-18 supports simultaneous dual-slope grading — you can independently set X-axis and Y-axis grade percentages at the same time, which is essential for crowned road profiles and complex drainage planes.
- What is the maximum working range of the GL1425C-18 with the CR700 receiver?
- With the included CR700 receiver under typical daylight conditions, the GL1425C-18 provides a working diameter of up to 2,000 feet (600 meters), making it suitable for large commercial and civil grading sites.
- Does the GL1425C-18 work with machine control systems?
- The CR700 receiver included with this kit supports machine-mount configurations and is compatible with certain aftermarket machine control setups. For dedicated machine control integration, Spectra's HL760 receiver is also compatible with the GL1425C-18 laser head.
- How long does the 18V battery last in the field?
- Under normal operating conditions, the rechargeable 18V Li-Ion battery provides up to 20 hours of runtime per charge. A full recharge typically takes 4–6 hours using the included charger.
Frequently Asked Questions
Can the GL1425C-18 set grades on both axes at the same time?
Yes. The GL1425C-18 supports simultaneous dual-slope grading — you can independently set X-axis and Y-axis grade percentages at the same time, which is essential for crowned road profiles and complex drainage planes.
What is the maximum working range of the GL1425C-18 with the CR700 receiver?
With the included CR700 receiver under typical daylight conditions, the GL1425C-18 provides a working diameter of up to 2,000 feet (600 meters), making it suitable for large commercial and civil grading sites.
Does the GL1425C-18 work with machine control systems?
The CR700 receiver included with this kit supports machine-mount configurations and is compatible with certain aftermarket machine control setups. For dedicated machine control integration, Spectra's HL760 receiver is also compatible with the GL1425C-18 laser head.
How long does the 18V battery last in the field?
Under normal operating conditions, the rechargeable 18V Li-Ion battery provides up to 20 hours of runtime per charge. A full recharge typically takes 4–6 hours using the included charger.
