Spectra Precision GL1425C-14 Dual Grade Laser Bluetooth w/ CR700 Multi-Use Deluxe Receiver

The Spectra Precision GL1425C-14 is a professional self-leveling dual-slope grade laser engineered for demanding sitework, civil construction, and infrastructure layout. Pairing the GL1425C laser head with the CR700 machine-control-ready receiver, this system delivers ±0.060" accuracy across both X and Y grade axes — giving grade foremen and equipment operators a reliable solution for everything from basic pad prep to complex compound-slope drainage design. Built-in Bluetooth connectivity lets the rod person or grade checker control slope settings and monitor instrument status from up to 300 feet away using the free Spectra Precision Layout app, eliminating the constant radio back-and-forth that slows down large-crew operations.

System Overview & Jobsite Applications

Designed for contractors who need verified grade control on earthwork, site development, and utility projects, the GL1425C-14 handles horizontal self-leveling, single-axis grade, and full dual-axis grade in one compact instrument. The CR700 receiver mounts directly to grade rods or machine masts and provides clear audio and visual grade indication at distances up to 2,600 feet in diameter — making it equally effective for hand grading and machine guidance on motor graders, dozers, and skid steers. Whether you are establishing subgrade on a commercial building pad, setting fall on a storm sewer run, or grading a detention pond embankment to a specific cross-slope, the GL1425C-14 gives your crew the speed and accuracy to stay on grade all day.

Key Specifications

• Grade Range: ±10% on both X and Y axes simultaneously
• Self-Leveling Range: ±5° automatic compensation
• Accuracy: ±0.060" at 100 ft (±1.5 mm at 30 m)
• Working Diameter: Up to 2,600 ft (800 m) with CR700
• Rotation Speed: 100, 300, 600 RPM selectable
• Beam Type: Red laser diode, Class IIIa / Class 3R
• Bluetooth Range: Up to 300 ft (90 m) remote control
• Battery Life: Up to 100 hours on 4 D-cell alkaline batteries
• Operating Temperature: -4°F to +131°F (-20°C to +55°C)
• Water & Dust Protection: IP66-rated laser head
• CR700 Receiver Detection Window: 4.5 in (114 mm)

What's in the Kit

• Spectra Precision GL1425C dual-slope grade laser head
• CR700 digital grade receiver with rod clamp
• Rechargeable battery pack and AC charger
• Carrying case for laser head
• Operator's manual and quick-start guide
• Compatible with Spectra Precision Layout mobile app (iOS & Android)

Job Applications

Site Grading & Pad Preparation: Set X and Y slopes simultaneously to match engineered grading plans on commercial and residential pads. The CR700 gives grade checkers instant cut/fill indication without returning to the instrument.

Utility & Storm Drain Layout: Establish consistent pipe fall on sewer, water, and drainage runs. Single-axis grade mode lets you lock in a precise percentage slope and hold it across long straight runs where consistent invert elevation is critical.

Detention Pond & Embankment Grading: Dual-slope capability handles compound cross-fall on pond bottoms and swales where both longitudinal and transverse grades must be controlled simultaneously to meet hydraulic design requirements.

Foundation & Flatwork Layout: Use horizontal self-level mode for elevation transfer on foundation walls, slab forms, and flatwork where a consistent datum plane across the entire pour area is required.

Compatible Accessories

• Spectra CR700 Replacement Receiver
• Spectra LL300S Laser Level Tripod
• Spectra 8-Foot Grade Rod
• Spectra Rechargeable Battery Pack for GL1425C
• Spectra Precision Layout App (Free Download)

Related Guides

• How to Set Dual Slope with the GL1425C — Step-by-Step Guide
• Grade Laser vs. Pipe Laser: Which Do You Need?
• CR700 Receiver Setup and Sensitivity Adjustment Tips
• Choosing the Right Grade Laser for Sitework

Frequently Asked Questions

Can the GL1425C-14 be used for machine control on a dozer or motor grader?

The CR700 receiver included in this kit is machine-control ready and can be mounted on a grade rod mast attached to the blade. For fully automated blade control, you would pair the receiver output with a compatible machine control box. Many contractors use this system as a cost-effective indicate-only machine guidance setup on small to mid-size grading equipment.

What is the difference between the GL1425C and the GL1500C?

The GL1425C features dual-slope functionality with Bluetooth remote control, while the GL1500C is typically a single-slope or horizontal-only instrument in the same product family. The GL1425C-14 kit is specifically configured with the CR700 receiver and is well-suited for sitework requiring compound grade control.

How far away can I control the laser using Bluetooth?

Bluetooth remote range is rated up to 300 feet (90 m) under typical open-air jobsite conditions. This allows the rod operator to adjust grade percentages, change rotation speed, or check instrument status from the far end of most residential and light commercial grading sites without walking back to the laser.

Is the GL1425C-14 accurate enough for utility pipe installation?

Yes. The ±0.060" accuracy at 100 feet meets the tolerance requirements for most gravity-flow utility installations including storm drain, sanitary sewer, and water main rough grading. For precision pipe laser work requiring tighter tolerances on long underground runs, a dedicated pipe laser such as the Spectra LP51 would be the appropriate upgrade.