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Spectra Precision GL622N-BL Dual Grade Laser
±25% on both X and Y axes simultaneously Range
Cover large layout jobs with a ±25% on both X and Y axes simultaneously working reach.
±1.5 arc seconds (standard deviation) Accuracy
Hold grade with a ±1.5 arc seconds (standard deviation) accuracy rating.
Power
Runs on Internal rechargeable battery — up to 100 hours runtime for jobsite flexibility.
Authorized Spectra Precision Dealer
Genuine, factory-fresh Spectra Precision equipment with legitimate firmware and calibration documentation.
Continuous grade control, no stakes
Eliminates grade staking between passes. One operator on the machine vs. 2-3-person conventional crew.
Authorized Dealer
Genuine equipment sourced straight from manufacturer partners.
Ships Same Day
Orders placed before 2 PM CT leave the dock today.
Genuine Gear
Factory-fresh, authentic units with legitimate firmware.
Best-Price Guarantee
Authorized-dealer pricing on every unit — request a quote anytime.
Kit Builder
Not sure what goes with this grade laser?
Answer a few job questions and our Kit Builder assembles the full setup — receiver, rod, tripod, and case matched to your workflow.
Quick Answer
What is the Spectra Precision GL622N-BL?
The Spectra Precision GL622N-BL Dual Grade Laser is a professional-grade dual axis laser level designed for construction and grading applications. It delivers ±25% grade accuracy on both X and Y axes simultaneously with an operating range up to 2,000 ft diameter and automatic self-leveling within ±5°. It's available from Express Tools.
What contractors use this grade lasers for
Motor Grader Control
Automatic blade control for road base and subgrade
Dozer Earthwork
Push-to-grade for rough cut and finish passes
Pipe Trench Grading
Set trench bottom elevation for gravity pipe installation
Drainage Work
Parking lot drainage, swales, retention basins
Product Description
The Spectra Precision GL622N-BL is a professional-grade dual slope laser transmitter designed for contractors who demand accurate, simultaneous cross-slope and longitudinal slope control on large-scale earthwork and civil grading projects. Sold as a bare laser unit, the GL622N-BL integrates seamlessly with your existing Spectra Precision detector and grade rod setups, making it a cost-effective upgrade or replacement for seasoned grading crews. With an operating range of up to 2,000 feet in diameter and rugged IP66-rated weather resistance, this instrument is built to perform in demanding field conditions.
Built for Large-Scale Grading Operations
The GL622N-BL excels on jobsites where single-axis lasers fall short. Its dual-slope capability allows operators to set independent grade percentages on both the X and Y axes simultaneously—eliminating the need for repeated setups when transitioning from longitudinal to cross-slope verification. This makes the GL622N-BL the go-to instrument for highway subgrade preparation, landfill cell construction, detention pond grading, commercial site development, and airport apron drainage design. The self-leveling range of ±5° handles uneven terrain setups, while the motorized head ensures rapid, repeatable grade changes without manual adjustment.
Key Specifications
- Laser Class: Class IIIa (Class 3R), 635 nm visible red beam
- Grade Range: ±25% on both X and Y axes simultaneously
- Self-Leveling Range: ±5° automatic
- Operating Range: Up to 2,000 ft (610 m) diameter
- Grade Accuracy: ±1.5 arc seconds (standard deviation)
- Rotation Speed: 100, 300, 600 RPM selectable
- Power: Internal rechargeable battery — up to 100 hours runtime
- Weather Protection: IP66 dust and water resistant
- Operating Temperature: -20°C to +50°C (-4°F to 122°F)
- Weight: Approximately 5.3 lbs (2.4 kg)
Key Features
- Simultaneous dual-axis grade control for X and Y slopes in a single setup
- Motorized grade head with remote-compatible operation via HL760 or compatible receiver
- Smart oscillating scan mode for increased detector sensitivity at long range
- Automatic out-of-level shutoff with audible and visual alerts
- Large, backlit LCD display for easy grade reading in bright sunlight
- Robust die-cast aluminum housing rated IP66 for all-weather field use
- Compatible with Spectra Precision HL760 and HR320 machine control receivers
- Long 100-hour battery life reduces downtime on multi-day projects
Job Applications
Highway & Road Subgrade: Set simultaneous crown and longitudinal grades for subbase compaction verification across wide roadway corridors without repositioning equipment.
Landfill Cell Construction: Achieve precise multi-directional slopes required for liner system installation and leachate collection system compliance grading.
Commercial Site Drainage: Lay out complex parking lot and detention basin grades where ADA cross-slope tolerances and stormwater flow directions must both be maintained.
Agricultural Land Leveling: Control field slope in two directions simultaneously for irrigation efficiency and uniform drainage across large agricultural parcels.
Compatible Accessories
- Spectra Precision HL760 Laser Receiver — High-sensitivity detector for machine and hand-grade applications
- Spectra Precision HR320 Machine Control Receiver — For motor grader and dozer integration
- Spectra Precision HL450 Laser Receiver — Budget-friendly detector for hand-grade crews
- Spectra Precision RC602 Remote Control — Wireless grade adjustment from the machine cab
- Heavy-Duty Tripod for Grade Lasers — Stable platform for long-range setups
- Spectra Precision Carrying Case for GL Series — Protective transport and storage case
Frequently Asked Questions
- Does the GL622N-BL include a receiver or grade rod?
- No. The GL622N-BL is a bare laser unit only and does not include a laser receiver, grade rod, tripod, or remote control. This configuration is ideal for contractors who already own compatible Spectra Precision receivers and want a transmitter-only purchase. Compatible receivers include the HL760, HL450, and HR320.
- What is the difference between the GL622N and the GL622N-BL?
- The GL622N typically refers to a packaged kit that includes a receiver and carrying case, while the GL622N-BL (Bare Laser) is the transmitter unit sold alone. Both share the same core laser transmitter hardware and performance specifications.
- Can the GL622N-BL be used with machine control systems?
- Yes. The GL622N-BL is compatible with Spectra Precision machine control receivers such as the HR320, enabling integration with motor graders, dozers, and scrapers for automated grade control on earthmoving equipment.
- What is the maximum grade percentage the GL622N-BL can achieve?
- The GL622N-BL supports grade settings of up to ±25% on both the X and Y axes simultaneously, covering the full range of slopes encountered in highway, drainage, and earthwork applications.
Why This Equipment
Dual Grade Control
Control two slopes simultaneously for crowns, swales, and complex drainage layouts.
Machine Ready
Pairs with machine receivers for dozer, grader, and scraper grade control.
IP67 Rated
Weatherproof for outdoor use in rain, dust, and construction site conditions.
High Accuracy
±0.1mm/m grade accuracy — holds tolerance through a full working day.
Continuous grade control. No continuous labor.
Grade stakers cost $50–80/hr and disappear between passes. A dual-slope grade laser installs once and controls your blade automatically — through every cut, every fill, every pass. That's the math that makes grade lasers one of the fastest ROI investments in earthwork.
Professional contractors specify dual-grade systems for a reason: single-grade units work for straight drainage. The moment a job has a crown, a swale, or a complex parking lot slope — you need dual-grade.
Buying from Express Tools means authorized, factory-fresh inventory, legitimate firmware, and technical knowledge when you need it.
Specifications
Technical Specs
Manufacturer data and field-verified measurements.
| Laser Class | Class IIIa (Class 3R), 635 nm visible red beam |
|---|---|
| Grade Range | ±25% on both X and Y axes simultaneously |
| Self-leveling Range | ±5° automatic |
| Operating Range | Up to 2,000 ft (610 m) diameter |
| Grade Accuracy | ±1.5 arc seconds (standard deviation) |
| Rotation Speed | 100, 300, 600 RPM selectable |
| Power | Internal rechargeable battery — up to 100 hours runtime |
| Weather Protection | IP66 dust and water resistant |
| Operating Temperature | -20°C to +50°C (-4°F to 122°F) |
| Weight | Approximately 5.3 lbs (2.4 kg) |
Built for Spectra Precision equipment owners
Document machine-control grading
Track blade passes, log finished grade, and produce as-built reports your inspector will accept — straight from the cab or the field.
- Bid-vs-actual production tracking
- Photo documentation per pass
- Calibration & service history
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Spectra Precision GL622N-BL Dual Grade Laser
$2825.00
Free 30 days with every Express Tools purchase
Your equipment. Your data. All in one place.
Gradelog is the field-execution platform built for grading and earthwork crews. Log grade shots, track cut/fill, document phases with photos, and generate as-built reports — from the cab to the office.
- Grade shots & cut/fill tracking per job
- Photo documentation by phase, task, and equipment
- As-built reports ready for inspector sign-off
- AI field assistant — troubleshoot on the jobsite
Built by the same team as Express Tools
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