Spectra Precision GL1425C Dual Grade Laser Bluetooth w/ HL760 Laserometer

The Spectra Precision GL1425C is a professional dual-grade rotating laser level engineered for contractors who need to control both X-axis and Y-axis slopes simultaneously from a single instrument. Whether you're grading a parking lot, setting drainage fall on a concrete slab, or verifying finish subgrade elevations across a large site, the GL1425C delivers the accuracy and operational efficiency that keeps production on schedule and on budget.

Instrument Overview & Jobsite Applications

Designed for demanding site civil and grading operations, the GL1425C projects a red rotating laser beam with a self-leveling range of ±5° and grade capability up to ±10% on both axes. Bluetooth Smart remote connectivity allows the machine operator or grade checker to adjust elevation and slope settings from the cab or across the jobsite without walking back to the instrument. The included rechargeable NiMH battery system provides extended run time suitable for full production shifts, reducing downtime associated with disposable battery changes on active grading operations.

Key Specifications

• Beam Color: Red
• Grade Range: ±10% on both X and Y axes simultaneously
• Self-Leveling Range: ±5°
• Accuracy: ±1.5mm at 30m (±1/16" at 100 ft)
• Operating Range: Up to 700m (2,300 ft) diameter with detector
• Rotation Speed: 100, 300, and 600 RPM selectable
• Remote Control: Bluetooth Smart wireless remote included
• Power: Rechargeable NiMH battery pack; AC adapter included
• Battery Run Time: Approx. 20 hours per charge
• IP Rating: IP66 dust and water resistant
• Operating Temperature: -20°C to +50°C (-4°F to +122°F)

Key Features

• Simultaneous dual-axis grade control eliminates the need for two separate setups
• Bluetooth Smart remote for full instrument control from up to 200m away
• Automatic self-leveling with out-of-level alarm for consistent grade reference
• Selectable rotation speeds optimize visibility for different lighting conditions and detector use
• Rechargeable NiMH battery system rated for full-shift operation
• IP66-rated housing withstands dust, rain, and jobsite wash-down
• Compatible with Spectra HL760 and HR320 laser detectors for extended range work
• Tripod-mounted or machine-grade pole mountable for flexible deployment

Job Applications

Parking Lot & Roadway Grading: Set cross-fall and longitudinal slope simultaneously to meet civil drawings in a single instrument pass. The dual-grade function reduces setup time compared to single-axis lasers, critical when grade tolerances are tight and inspection windows are short.

Concrete Flatwork & Slab Prep: Establish precise finish subgrade elevation with controlled slope for drainage. The GL1425C's ±1.5mm accuracy at 30m supports ACI flatness tolerances on warehouse slabs, commercial floors, and tilt-up pads.

Landscape Grading & Drainage Swales: Control surface drainage grade around structures and across large landscaped areas. Bluetooth remote operation lets a single operator manage the laser while directing equipment from the work zone.

Agricultural & Land Leveling: The wide operating range and machine-mount compatibility make the GL1425C suitable for field leveling operations where large area coverage and consistent grade accuracy directly affect irrigation efficiency and crop yield.

Compatible Accessories

• Spectra HL760 Universal Laser Detector
• Spectra HR320 Machine Control Receiver
• Spectra RC602 Bluetooth Remote Control (replacement)
• Heavy-Duty Tripod for Rotating Lasers
• Spectra Grade Rod with Sliding Target
• Rechargeable NiMH Battery Pack (spare)

Related Guides

• How to Set Dual-Axis Grade with a Rotating Laser
• Choosing the Right Laser Detector for Grade Work
• Rotating Laser Level Setup Tips for Concrete Flatwork
• Spectra GL Series Comparison: GL1425C vs GL422N

Frequently Asked Questions

Can the GL1425C set different slopes on both axes at the same time?

Yes. The GL1425C supports independent grade input on both the X and Y axes simultaneously, allowing you to establish a true dual-slope plane in a single setup — essential for parking lots, drainage pads, and agricultural leveling where cross-fall and longitudinal slope must both be controlled at once.

What laser detector is recommended for outdoor grade work with the GL1425C?

Spectra recommends the HL760 universal detector for rod and hand-held use, and the HR320 for machine-mounted receiver applications. Both are compatible with the GL1425C's red beam and support the instrument's full operating range of up to 700m diameter.

How does the Bluetooth remote work on the GL1425C?

The included Bluetooth Smart remote pairs directly with the instrument and allows the operator to adjust elevation, change grade values on either axis, and control rotation speed from up to 200m away. No separate app or device is required — the dedicated remote handles all primary instrument functions.

Is the GL1425C suitable for machine control applications?

The GL1425C is compatible with machine-mounted laser receivers such as the Spectra HR320, making it suitable for dozer and motor grader grade control in single-laser configurations. For full 3D machine control or GPS-integrated systems, a dedicated machine control platform would be recommended instead.