The Spectra GL1425C-29 is a production-grade laser package engineered for contractors who demand speed, accuracy, and versatility on demanding commercial job sites. This complete kit pairs the GL1425C dual-slope rotating laser with the HL760 Deluxe Laser Receiver, a heavy-duty elevator tripod, and an inch-graduated grade rod — delivering a fully integrated grading system ready to work straight out of the case. Whether you're establishing complex cross-slopes on a multi-acre parking facility or shooting precise finish grades on a commercial site development, the GL1425C-29 gives your crew the tools to perform at the highest level.
System Overview & Jobsite Applications
The GL1425C-29 is built around the Spectra GL1425C laser instrument, which projects a self-leveling rotating plane across two independent axes simultaneously — enabling true dual-grade setups without secondary calculations. The included elevator tripod is a standout efficiency feature: it allows vertical instrument repositioning without disturbing the tripod legs, dramatically reducing setup time when moving between benchmarks or re-shooting grades on multi-phase projects. The HL760 receiver extends detection range up to 2,000 feet in diameter and includes a large, easy-to-read display for fast grade transfer even in bright sunlight. The inch-graduated rod completes the package for contractors working in imperial measurements on U.S. job sites.
Key Specifications
- Model: Spectra GL1425C-29
- Grade Range: ±10% on both axes simultaneously
- Self-Leveling Range: ±5°
- Accuracy: ±1.5mm at 30m (1/16" at 100 ft)
- Rotation Speed: 150, 300, or 600 RPM selectable
- Working Diameter: Up to 2,600 ft (with HL760)
- Receiver Detection Range: Up to 1,300 ft radius
- Bluetooth: Yes — wireless control via Spectra Precision Layout app
- Battery Life: Up to 35 hours (alkaline)
- IP Rating: IP66 dust and water resistant
- Rod Graduations: Inches (imperial)
What's in the Kit
- Spectra GL1425C Dual-Grade Rotating Laser Instrument
- HL760 Deluxe Laser Receiver with carrying bracket
- Elevator Tripod — heavy-duty aluminum with vertical elevation column
- Inch-Graduated Grade Rod — imperial measurement for U.S. site work
- Carrying case, batteries, and operator documentation
Job Applications
Commercial Parking Lots & Paved Surfaces: Set precise cross-slopes and longitudinal grades across large paved areas in a single instrument setup. The dual-grade capability eliminates the need to re-shoot or reposition when establishing complex drainage planes on multi-acre lots.
Large-Scale Site Development: Speed up grading on multi-phase commercial sites with the elevator tripod's vertical repositioning. Move between benchmark elevations quickly without resetting the entire tripod — a critical time saver when grades shift across a large project footprint.
Athletic Fields & Turf Grading: The GL1425C's fine grade control and high accuracy make it ideal for establishing the precise, consistent slopes required for athletic field drainage without over-cutting or under-filling.
Drainage & Utility Corridor Grading: Use simultaneous dual-axis grade projection to verify proper fall on drainage swales, retention basins, and utility corridors where both cross-slope and longitudinal slope must be controlled concurrently.
Compatible Accessories
- Spectra HL760 Replacement Receiver
- Spectra RC703 Remote Control
- Spectra Grade Rod (Metric)
- Replacement Alkaline Battery Pack
- Heavy-Duty Laser Detector Clamp
Related Guides
- How to Set Dual Grade with the Spectra GL1425C
- Elevator Tripod Setup Tips for Grade Lasers
- Choosing the Right Laser Receiver for Site Work
- GL1425C vs GL1450 — Which Grade Laser Is Right for Your Project?
Frequently Asked Questions
- Does the GL1425C-29 include Bluetooth control?
- Yes. The GL1425C instrument features built-in Bluetooth connectivity, allowing you to adjust grade settings, rotation speed, and instrument functions wirelessly from your smartphone or tablet using the Spectra Precision Layout app — eliminating trips back to the instrument during active grading operations.
- What is the advantage of the elevator tripod included in this kit?
- The elevator tripod allows vertical height adjustment of the instrument without moving or repositioning the tripod legs. This is especially valuable on complex sites where you need to match multiple benchmark elevations — you can raise or lower the instrument column quickly to re-establish grade without resetting your horizontal position.
- Can the GL1425C-29 be used with a machine control system?
- The GL1425C is compatible with a range of grade control machine receivers. For full machine control integration, additional components may be required. Contact our team to confirm compatibility with your specific dozer, motor grader, or scraper system.
- Why does this package use inch-graduated rods instead of metric?
- The GL1425C-29 is configured for U.S. contractors working in imperial measurements. The inch-graduated rod is calibrated for foot-and-inch layout common on domestic commercial and civil grading projects. If your workflow requires metric graduation, Express Tools also carries metric rod configurations — contact us for availability.
Frequently Asked Questions
Does the GL1425C-29 include Bluetooth control?
Yes. The GL1425C instrument features built-in Bluetooth connectivity, allowing you to adjust grade settings, rotation speed, and instrument functions wirelessly from your smartphone or tablet using the Spectra Precision Layout app — eliminating trips back to the instrument during active grading operations.
What is the advantage of the elevator tripod included in this kit?
The elevator tripod allows vertical height adjustment of the instrument without moving or repositioning the tripod legs. This is especially valuable on complex sites where you need to match multiple benchmark elevations — you can raise or lower the instrument column quickly to re-establish grade without resetting your horizontal position.
Can the GL1425C-29 be used with a machine control system?
The GL1425C is compatible with a range of grade control machine receivers. For full machine control integration, additional components may be required. Contact our team to confirm compatibility with your specific dozer, motor grader, or scraper system.
Why does this package use inch-graduated rods instead of metric?
The GL1425C-29 is configured for U.S. contractors working in imperial measurements. The inch-graduated rod is calibrated for foot-and-inch layout common on domestic commercial and civil grading projects. If your workflow requires metric graduation, Express Tools also carries metric rod configurations — contact us for availability.
