The Spectra Precision GL622IR is a professional dual-slope infrared grade laser engineered for contractors who need reliable grade control in high-ambient-light conditions where a standard red beam laser falls short. Pairing invisible infrared laser technology with the precision of independent dual-axis slope control, the GL622IR delivers consistent, accurate results on demanding grading, drainage, and site work projects.
Product Overview & Jobsite Applications
Unlike visible red beam lasers that struggle in bright sunlight, the GL622IR transmits an infrared signal detected exclusively by the included HL760 receiver, making it effective outdoors at extended ranges regardless of lighting conditions. The RC602N remote control allows operators to adjust slope values and monitor laser status wirelessly from any point on the site, eliminating repeated trips back to the instrument. Whether you are establishing a single-plane grade, setting dual-axis fall on a parking lot, or dialing in swales for drainage work, the GL622IR handles the task with repeatable, survey-grade accuracy.
Key Specifications
- Laser Type: Infrared (invisible beam), Class 1
- Self-Leveling Range: ±5° automatic compensation
- Dual Slope Range: ±10% on both X and Y axes simultaneously
- Grade Resolution: 0.001% increments
- Accuracy: ±1.5 mm at 30 m (±1/16" at 100 ft)
- Operating Range: Up to 600 m (2,000 ft) diameter with HL760 receiver
- Rotation Speed: 0, 150, 300, 600 RPM selectable
- Power Source: Rechargeable NiMH battery pack or AC adapter
- Battery Life: Up to 100 hours per charge
- IP Rating: IP66 dust and water resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
What's in the Kit
- GL622IR infrared grade laser transmitter
- HL760 infrared laser receiver with bracket and clamp
- RC602N wireless remote control
- Rechargeable NiMH battery pack
- AC wall charger
- Carrying case
- Operator's manual
Job Applications
Parking Lots & Flatwork: Set independent X and Y slopes simultaneously to achieve proper drainage fall across large concrete or asphalt pours — no secondary setups required.
Site Grading & Earthwork: Control motor graders and scrapers with the extended 600 m working range; the infrared signal remains stable in full sun where visible lasers wash out.
Drainage & Swale Work: Program precise low-percentage grades down to 0.001% for culverts, retention areas, and agricultural drainage channels that demand exact slope tolerances.
Foundation & Slab Prep: Establish consistent elevation references across large slab areas using the HL760 receiver on a grade rod, speeding up formwork and subbase verification.
Compatible Accessories
- HL760 Infrared Laser Receiver — replacement or additional detector for large crew operations
- RC602N Wireless Remote Control — spare or replacement remote for the GL622IR
- Spectra Precision Elevator Tripod — heavy-duty aluminum tripod for stable field setup
- NiMH Rechargeable Battery Pack — extended runtime battery for all-day use
- Detector Holder & Grade Rod Clamp — universal mounting hardware for HL760 on any grade rod
Related Guides
- How to Set Dual Slope with the Spectra GL622IR
- Infrared vs. Red Beam Grade Lasers: Which Is Right for Your Site?
- Using the RC602N Remote for Wireless Grade Adjustments
- Grade Laser Calibration & Field Check Procedures
Frequently Asked Questions
- Can the GL622IR be used with machine control systems?
- The GL622IR is primarily a rotating grade laser designed for manual grade rod and receiver use. For full machine control integration, Spectra Precision offers dedicated machine control lasers; however, the GL622IR's infrared signal is compatible with many aftermarket machine control receivers — consult your dealer for compatibility details.
- What is the difference between the GL622IR and the standard GL622?
- The GL622 uses a visible red beam, while the GL622IR emits an invisible infrared signal. The infrared version is preferred for outdoor, high-ambient-light applications where the red beam is difficult for the receiver to lock onto at long range. Both models share the same dual-slope capability and operating range.
- How far away can the RC602N remote control the laser?
- The RC602N wireless remote operates at ranges up to approximately 200 m (650 ft) line-of-sight, allowing grade operators to adjust slope percentages, change rotation speed, and power the unit on or off without walking back to the laser.
- Is the GL622IR covered by a warranty?
- Spectra Precision backs the GL622IR with a standard limited warranty covering defects in materials and workmanship. Express Tools is an authorized dealer, so your unit is fully eligible for factory warranty service. Contact us for current warranty terms and repair service options.
