Spectra Precision GL1425C-BL Dual Grade Laser Bluetooth /

Wireless Grade Control on the Jobsite

The Spectra Precision GL1425C-BL puts dual-axis slope control in the palm of your hand. With built-in Bluetooth connectivity, you can adjust grade settings directly from your smartphone or tablet using Spectra's free mobile app — no more walking back to the tripod every time conditions change. Whether you're fine-tuning drainage slopes on a commercial pad or dialing in subgrade for a parking structure, the GL1425C-BL keeps your crew moving and your cuts accurate. This listing is for the laser transmitter only; no receiver, remote control, rod clamp, or carrying case is included.

Professional Grade Laser Built for Demanding Site Work

Designed for contractors who need reliable dual-slope performance across a full shift, the GL1425C-BL delivers a self-leveling range of ±10% (5°42') on both the X and Y axes simultaneously. The red beam laser is compatible with all standard Spectra and Trimble grade receivers, making it an easy upgrade into existing machine control or manual grade setups. The rechargeable Li-Ion battery system delivers up to 60 hours of runtime per charge, and the unit is rated IP66 for dust and water resistance — built to stay on the tripod through long pours and site exposure.

Key Specifications

• Model: GL1425C-BL
• Laser Class: Class IIIa / Class 3R, 635 nm red beam
• Self-Leveling Range: ±10% (5°42') on both X and Y axes
• Grade Range: ±25% on both axes simultaneously
• Grade Accuracy: ±1.5 arc seconds (at factory calibration)
• Rotation Speed: 100, 300, or 600 RPM selectable
• Working Range: Up to 1,200 ft diameter with compatible receiver
• Battery: Rechargeable Li-Ion, up to 60 hours runtime
• Ingress Protection: IP66 dust and water resistant
• Connectivity: Bluetooth (compatible with Spectra LMapp)
• Weight: Approximately 4.5 lbs (2.0 kg)

Key Features

• Built-in Bluetooth for full remote control via Spectra LMapp on iOS and Android
• Simultaneous dual-axis grade setting — adjust X and Y slope independently
• Wide self-leveling range handles uneven setups without manual shimming
• Rechargeable battery with runtime indicator and low-battery alert
• Automatic shutdown on out-of-level detection protects grade integrity
• Compatible with all Spectra and Trimble grade laser receivers
• Simple, intuitive control panel with grade readout display
• Rugged housing rated IP66 for extended outdoor exposure

Job Applications

Commercial Site Grading: Set precise cross-slopes and longitudinal grades across large commercial pads. Bluetooth control lets the grade setter adjust slope from machine cab or remote location without interrupting the scraper or dozer operator.

Drainage and Swale Work: Establish accurate positive drainage grades on athletic fields, parking lots, and landscaped areas where standing water can't be tolerated. The ±25% grade range covers steep swale work with a single setup.

Concrete Flatwork and Slab Pours: Provide a consistent rotating reference plane for screed operators working large floor slabs or tilt-up pads. Compatible receivers clip directly to screed handles for hands-free grade verification.

Machine Control Reference: Use as a transmitter with a mast-mounted receiver on a motor grader or skid steer to maintain consistent subgrade cuts across a site. Bluetooth app eliminates manual grade changes when transitioning between zones.

Compatible Accessories

• Spectra HL760 Laser Receiver — recommended grade rod receiver for the GL1425C-BL
• Spectra RC703 Remote Control — infrared remote alternative to Bluetooth app
• Spectra LR50 Machine-Mount Receiver — dual-sided receiver for blade and bucket control
• Spectra GL1425C Carrying Case — heavy-duty padded case for transport and storage
• Spectra Rechargeable Battery Pack — spare Li-Ion battery for extended shifts
• Heavy-Duty Tripod for Grade Lasers — stable platform for large-diameter site work

Related Guides

• How to Set Dual Grade with the Spectra GL1425C-BL
• Spectra LMapp Setup Guide — Bluetooth Pairing and Grade Control
• Choosing the Right Grade Laser Receiver for Your Application
• Grade Laser vs. Pipe Laser: Which Do You Need?

Frequently Asked Questions

Does the GL1425C-BL come with a receiver or carrying case?

No. This listing is for the laser transmitter only. No receiver, remote control, rod clamp, or carrying case is included. If you need a complete package, contact our team for bundle pricing with compatible receivers and accessories.

What app do I need to control the GL1425C-BL via Bluetooth?

The GL1425C-BL pairs with the Spectra LMapp, available free on both iOS and Android. The app allows full remote control of grade settings, rotation speed, and power functions from your smartphone or tablet within Bluetooth range.

Is the GL1425C-BL compatible with other brands of grade receivers?

The GL1425C-BL is fully compatible with all Spectra Precision and Trimble grade laser receivers. It also works with most standard red-beam compatible receivers from other manufacturers, though Spectra receivers are recommended for best performance and feature integration.

What is the difference between the GL1425C and the GL1425C-BL?

The GL1425C-BL adds built-in Bluetooth connectivity over the standard GL1425C model, enabling wireless grade control through the Spectra LMapp. All other specifications — grade range, accuracy, beam class, battery, and IP rating — are identical between the two models.