Complete Dual-Grade Laser System for Professional Contractors
The Spectra Precision GL622N-18 is a field-ready dual-slope laser package engineered for contractors who need precise grade and elevation control across a wide range of jobsite conditions. This bundled kit pairs the powerful GL622N dual-slope transmitter with the CR700 multi-function receiver, an elevator tripod, and a 15-foot grade rod — giving your crew everything required to deploy, shoot grades, and stay on spec from the moment you arrive on site. Whether you are grading a parking lot, setting forms for a concrete slab, or laying out utility runs, this package delivers the accuracy and workflow efficiency that professional contractors demand.
System Overview & Jobsite Applications
The GL622N transmitter operates in both single-slope and dual-slope (X and Y axis simultaneously) modes, making it versatile enough to handle complex cross-slope work without repositioning the instrument. The self-leveling range of ±5° ensures fast setup even on uneven ground, while the wide operating range of up to 2,000 feet in diameter means one setup covers large work areas. The CR700 receiver extends usability to bright outdoor conditions and mounts directly to the grade rod or to equipment-mounted applications. Combined, this system is purpose-built for grading crews, concrete flatwork contractors, utility installers, and site supervisors who rely on accurate elevation data throughout the day.
Key Specifications
- Accuracy: ±1/8 inch per 100 feet
- Grade Range: ±10% on both X and Y axes simultaneously
- Self-Leveling Range: ±5°
- Operating Range: Up to 2,000 ft (600 m) diameter with CR700 receiver
- Rotation Speed: 150, 300, or 600 RPM selectable
- Battery Life: Up to 100 hours on standard D-cell batteries
- IP Rating: Sealed against dust and moisture for outdoor use
- Remote Control: Full-function wireless remote included
What's in the GL622N-18 Kit
- GL622N dual-slope rotating laser transmitter
- CR700 laserometer receiver with dual-sided display
- Elevator tripod for precise height adjustment
- 15-foot fiberglass grade rod
- Wireless remote control
- Rechargeable battery pack and charger
- Carrying case for transmitter and accessories
Job Applications
Concrete Flatwork & Slab Pours: Set the GL622N once and control slab thickness and finish elevation across the entire pour area. The ±1/8-inch accuracy keeps flatwork within ACI tolerances and reduces grinding or remediation after cure.
Site Grading & Earthwork: Program cross-slopes for drainage on parking lots, athletic fields, or commercial pads. The dual-slope function eliminates the need for multiple instrument setups when working a bi-directional grade plane.
Utility & Pipeline Layout: Maintain consistent invert elevations for storm drain, sanitary sewer, and water main installations. The long operating range and remote-controlled grade adjustment let one operator manage pipe grade from the trench without walking back to the instrument.
Foundation & Footing Layout: Transfer benchmark elevations to batter boards and footing forms quickly. The elevator tripod allows precise height dialing so the laser beam intersects control marks without guesswork.
Compatible Accessories
- Spectra CR700 Replacement Receiver
- Machine Control Bracket for CR700
- Spectra HL760 Heavy-Duty Detector
- Aluminum Grade Rod Extension Sections
- Laser Tripod Carrying Bag
- Spectra Rechargeable Battery Pack (Replacement)
Related Guides
- How to Set Dual-Slope Grade with the GL622N
- Rotating Laser vs. Grade Laser: Choosing the Right Tool
- Setting Up a Laser Level for Concrete Flatwork
- Laser Receiver Basics: Getting the Most from Your CR700
Frequently Asked Questions
- Can the GL622N-18 set different slopes on the X and Y axes at the same time?
- Yes. The GL622N supports true dual-slope operation, allowing you to program independent grade percentages on both the X and Y axes simultaneously. This makes it ideal for parking lot drainage, athletic field crowning, and any application requiring a compound slope plane without repositioning the instrument.
- What is the operating range of the GL622N with the included CR700 receiver?
- With the CR700 receiver, the GL622N operates over a diameter of up to 2,000 feet (approximately 600 meters). This range is sufficient for most commercial grading, site work, and large slab pours from a single instrument setup.
- Is the GL622N-18 compatible with machine control systems?
- The CR700 receiver included in this package is machine-mountable and compatible with grade control brackets for dozer and scraper applications. For fully integrated machine control, additional mounting hardware and a compatible control box may be required — contact Express Tools for guidance on your specific equipment.
- How long does the battery last on the GL622N transmitter?
- The GL622N delivers up to 100 hours of runtime on a full charge using the included rechargeable battery pack. A standard D-cell battery backup option is also available, ensuring you can keep working even if the rechargeable pack is depleted mid-shift.
Frequently Asked Questions
Can the GL622N-18 set different slopes on the X and Y axes at the same time?
Yes. The GL622N supports true dual-slope operation, allowing you to program independent grade percentages on both the X and Y axes simultaneously. This makes it ideal for parking lot drainage, athletic field crowning, and any application requiring a compound slope plane without repositioning the instrument.
What is the operating range of the GL622N with the included CR700 receiver?
With the CR700 receiver, the GL622N operates over a diameter of up to 2,000 feet (approximately 600 meters). This range is sufficient for most commercial grading, site work, and large slab pours from a single instrument setup.
Is the GL622N-18 compatible with machine control systems?
The CR700 receiver included in this package is machine-mountable and compatible with grade control brackets for dozer and scraper applications. For fully integrated machine control, additional mounting hardware and a compatible control box may be required — contact Express Tools for guidance on your specific equipment.
How long does the battery last on the GL622N transmitter?
The GL622N delivers up to 100 hours of runtime on a full charge using the included rechargeable battery pack. A standard D-cell battery backup option is also available, ensuring you can keep working even if the rechargeable pack is depleted mid-shift.