The Spectra Precision GL622N-18-Special is a complete dual-slope laser grading package engineered for contractors who demand accuracy and reliability across demanding earthwork, site prep, and drainage projects. This purpose-built kit pairs the industry-trusted GL622N rotating laser transmitter with the versatile CR700 machine control receiver, a heavy-duty elevator tripod, and a 15-foot aluminum grade rod — giving your crew everything needed to get on grade and stay there, from day one on the job.
Dual-Slope Grading for Real Jobsite Conditions
The GL622N-18-Special is designed for contractors managing complex grading campaigns where single-axis slope control simply isn't enough. The GL622N transmitter sets independent X- and Y-axis slopes simultaneously, making it the right tool for crowned roadways, parking lot drainage, sports field grading, and agricultural land leveling. The CR700 receiver's large 12-inch detection window speeds up setup and reduces rod repositioning time, while the elevator tripod gives operators fast, repeatable height adjustments without breaking down the entire setup. Aluminum grade rod construction means the rod stays straight and accurate in wet, muddy, or high-UV environments where wood rods warp and fiberglass rods degrade over time.
Key Specifications
- Model: Spectra Precision GL622N-18-Special
- Slope Range (X & Y Axes): ±10% dual-axis grade capability
- Self-Leveling Range: ±5° automatic compensation
- Accuracy: ±1.5mm at 30m (±1/16 in. at 100 ft)
- Operating Range: Up to 800m diameter (2,600 ft) with CR700 receiver
- Rotation Speed: 150, 300, or 600 RPM selectable
- Receiver: CR700 with 12-inch detection window and numeric grade readout
- Grade Rod: 15-foot aluminum, metric/imperial graduations
- Tripod: Heavy-duty elevator tripod for fast height adjustment
- Power: Rechargeable battery pack, up to 100 hours runtime
- IP Rating: IP66 dust and water resistant transmitter
What's in the Kit
- Spectra Precision GL622N Dual-Slope Rotating Laser Transmitter
- CR700 Grade Laser Receiver with mounting bracket and clamp
- Heavy-Duty Elevator Tripod
- 15-Foot Aluminum Grade Rod (imperial/metric)
- Rechargeable battery pack and charger
- Carrying case for transmitter and receiver
- Operator's manual and quick-start guide
Job Applications
Parking Lot & Commercial Site Grading: Set dual cross-slopes to meet ADA and drainage specs across large asphalt or concrete pours. The GL622N's simultaneous X/Y slope control eliminates the need to reset the instrument between layout phases.
Roadway Crown & Superelevation: Crown road subgrades and base layers accurately using dual-axis grade settings. Machine-mount the CR700 to a motor grader or dozer blade for automated cut/fill guidance without a separate machine control system.
Sports Field Construction: Achieve precise crown and side-slope profiles for natural turf or synthetic fields. The wide operating range of the GL622N keeps the instrument positioned centrally while crews work across the full field width.
Agricultural Land Leveling & Drainage Ditching: Program field-specific slopes for irrigation runoff management or tile drainage outlet alignment. Durable aluminum rod construction stands up to muddy, wet field conditions season after season.
Compatible Accessories
- Spectra CR700 Replacement Receiver — spare or second-machine receiver for large crews
- Spectra RC602 Remote Control — adjust grade settings from up to 200m without touching the instrument
- Spectra CR600 Receiver — entry-level alternative receiver compatible with GL622N
- Aluminum Elevator Tripod Replacement Legs — field-replaceable leg assemblies for long-term fleet use
- Spectra Rechargeable Battery Pack — keep a backup on the charger for all-day operation
- Additional Aluminum Grade Rods — 8 ft, 12 ft, and 25 ft options available
Frequently Asked Questions
- Can the GL622N-18-Special be used for machine control on a dozer or grader?
- Yes. The included CR700 receiver is designed for both hand-held rod work and machine-mount applications. Using the optional machine mounting bracket, the CR700 can be attached to a blade or scraper to provide continuous on-grade guidance for motor graders, dozers, and box scrapers without a full GPS machine control system.
- What is the difference between the GL622N and the standard GL620?
- The GL622N adds independent dual-axis slope control, allowing contractors to set different grade values on the X and Y axes simultaneously. The GL620 is limited to single-axis slope. For parking lots, crowned roads, and sports fields where two-direction drainage is required, the GL622N is the appropriate choice.
- Is the aluminum grade rod compatible with other laser receivers?
- The 15-foot aluminum grade rod included in this kit is a standard contractor-grade measuring rod and is compatible with virtually all rotating laser receivers that use a standard clamp mount. The imperial/metric dual-face graduation makes it versatile across different project spec formats.
- How long does the battery last on the GL622N transmitter?
- The GL622N operates up to 100 hours on a full charge using the included rechargeable battery pack, depending on rotation speed and temperature conditions. For extended campaigns, Express Tools stocks replacement and backup battery packs sold separately.
Frequently Asked Questions
Can the GL622N-18-Special be used for machine control on a dozer or grader?
Yes. The included CR700 receiver is designed for both hand-held rod work and machine-mount applications. Using the optional machine mounting bracket, the CR700 can be attached to a blade or scraper to provide continuous on-grade guidance for motor graders, dozers, and box scrapers without a full GPS machine control system.
What is the difference between the GL622N and the standard GL620?
The GL622N adds independent dual-axis slope control, allowing contractors to set different grade values on the X and Y axes simultaneously. The GL620 is limited to single-axis slope. For parking lots, crowned roads, and sports fields where two-direction drainage is required, the GL622N is the appropriate choice.
Is the aluminum grade rod compatible with other laser receivers?
The 15-foot aluminum grade rod included in this kit is a standard contractor-grade measuring rod and is compatible with virtually all rotating laser receivers that use a standard clamp mount. The imperial/metric dual-face graduation makes it versatile across different project spec formats.
How long does the battery last on the GL622N transmitter?
The GL622N operates up to 100 hours on a full charge using the included rechargeable battery pack, depending on rotation speed and temperature conditions. For extended campaigns, Express Tools stocks replacement and backup battery packs sold separately.