The Spectra GL422N-2 is a professional dual-slope grade laser built for contractors who need precise X and Y axis grade control simultaneously. Whether you are grading a parking lot crown, establishing highway shoulder fall, or pouring a multi-directional concrete slab, this system eliminates the need for multiple setups and keeps your crew moving efficiently across the jobsite.
System Overview and Jobsite Applications
Unlike single-axis grade lasers that control slope in only one direction at a time, the GL422N-2 projects two independent grade beams simultaneously, letting you lock in longitudinal and transverse grades in a single instrument setup. The system is especially effective on complex civil and flatwork applications where elevation and cross-slope must be maintained at the same time. Paired with the CR700 grade rod receiver and the RC402N wireless remote control, the operator at the machine or hand grade rod can make real-time grade adjustments without returning to the laser.
Key Specifications
- Grade Range: ±10% on both X and Y axes simultaneously
- Grade Accuracy: ±1.5mm at 30m (±1/16 in. at 100 ft)
- Self-Leveling Range: ±5° automatic compensator
- Operating Range: Up to 700m (2,300 ft) diameter with CR700 receiver
- Rotation Speed: 0, 150, 300, 600 RPM selectable
- Beam Type: Dual red visible laser diodes
- Power: Internal rechargeable battery pack, 20+ hour runtime
- Weather Rating: IP66 dust and water resistant
- Remote Frequency: 433 MHz (RC402N compatible)
What's in the Kit
- Spectra GL422N-2 dual slope rotating laser head
- CR700 grade rod receiver with LED display and audible indicators
- RC402N wireless remote control for full-function operation up to 200m
- Inches grade rod for elevation transfers
- Rechargeable battery pack and AC wall charger
- Padded carrying and storage case
- Operator's manual and quick-start reference card
Job Applications
Parking Lots and Site Pads: Set crown slope and cross-fall simultaneously across large paved areas, ensuring positive drainage without resetting the instrument between passes.
Highway and Road Shoulders: Maintain consistent transverse slope across roadway shoulders and ditch lines while controlling longitudinal grade along the alignment in a single laser setup.
Drainage Channels and Swales: Control invert slope and bank angle at the same time for accurate channel grading on storm drainage and irrigation projects.
Multi-Directional Concrete Flatwork: Establish precise dual-pitch grades for sloped slabs, ramps, and tilt-up pads where both X and Y elevation control is required from the pour stage through finishing.
Compatible Accessories
- CR700 Replacement Receiver — Direct replacement with magnetic mount and rod clamp
- RC402N Remote Control — Wireless grade and function control up to 200m
- Spectra HL760 Heavy-Duty Tripod — Adjustable aluminum tripod rated for demanding jobsite use
- Spectra Grade Rod Extensions — Inches and metric extensions for deeper elevation transfers
- Rechargeable Battery Pack — Spare pack for all-day dual-shift operation
Related Guides
- How to Set Dual Slope with the GL422N-2 — Step-by-Step Setup Guide
- Grade Laser vs. Level Laser: Choosing the Right Tool for Your Project
- Using the RC402N Remote for Machine Control and Hand Grade Applications
- Spectra GL422N-2 vs. GL422N: What Changed and Which One You Need
Frequently Asked Questions
- Can the GL422N-2 be used for machine control applications?
- The GL422N-2 is primarily a conventional grade laser designed for hand grade rod and layout work. While the CR700 receiver can be mounted on a machine mast for basic motor grader or dozer guidance, it is not a full machine control system. For dedicated machine control integration, Spectra offers purpose-built solutions with dual-mast receivers and grade control interfaces.
- What is the difference between the GL422N and the GL422N-2?
- The GL422N-2 is a complete kit that includes the GL422N laser head along with the CR700 receiver, RC402N remote control, and inches grade rod. If you already own compatible accessories, you can purchase the laser head separately as the GL422N. The -2 suffix simply designates the bundled system configuration.
- How far can the RC402N remote control operate from the laser?
- The RC402N wireless remote has an operating range of up to 200 meters (approximately 650 feet) line-of-sight. It allows full control of grade settings on both axes, rotation speed, and power functions, so the machine operator or grade checker does not need to walk back to adjust the instrument.
- Is the GL422N-2 waterproof enough for rain and muddy conditions?
- Yes. The GL422N-2 carries an IP66 rating, meaning it is fully protected against dust ingress and against powerful water jets from any direction. It is built to handle rain, mud splash, and typical outdoor jobsite exposure. However, it should not be submerged in water or operated during lightning events.
Frequently Asked Questions
Can the GL422N-2 be used for machine control applications?
The GL422N-2 is primarily a conventional grade laser designed for hand grade rod and layout work. While the CR700 receiver can be mounted on a machine mast for basic motor grader or dozer guidance, it is not a full machine control system. For dedicated machine control integration, Spectra offers purpose-built solutions with dual-mast receivers and grade control interfaces.
What is the difference between the GL422N and the GL422N-2?
The GL422N-2 is a complete kit that includes the GL422N laser head along with the CR700 receiver, RC402N remote control, and inches grade rod. If you already own compatible accessories, you can purchase the laser head separately as the GL422N. The -2 suffix simply designates the bundled system configuration.
How far can the RC402N remote control operate from the laser?
The RC402N wireless remote has an operating range of up to 200 meters (approximately 650 feet) line-of-sight. It allows full control of grade settings on both axes, rotation speed, and power functions, so the machine operator or grade checker does not need to walk back to adjust the instrument.
Is the GL422N-2 waterproof enough for rain and muddy conditions?
Yes. The GL422N-2 carries an IP66 rating, meaning it is fully protected against dust ingress and against powerful water jets from any direction. It is built to handle rain, mud splash, and typical outdoor jobsite exposure. However, it should not be submerged in water or operated during lightning events.
