Spectra Precision GL422N-1 Dual Grade Laser w/ CR700 Receiver, TENTHS-Rod and Large System Carrying Case

Set Simultaneous X/Y Slopes with the Spectra Precision GL422N-1

The Spectra Precision GL422N-1 is a professional dual grade rotary laser engineered for contractors who need precise, simultaneous slope control in two perpendicular axes. Whether you're cutting drainage swales, grading parking lots, or shaping subgrade for road construction, the GL422N-1 delivers repeatable accuracy and the rugged field performance that earthwork professionals demand. This kit includes the GL422N dual grade laser, the CR700 remote-capable laser receiver, and a TENTHS grade rod — everything you need to get on grade from day one.

Product Overview & Jobsite Applications

Unlike single grade lasers that control slope in only one direction, the GL422N-1 allows you to dial in independent grade percentages on both the X and Y axes simultaneously. This is critical for applications like parking lot drainage, agricultural field leveling, and DOT road crown work where compound slopes must be achieved and held across large areas. The laser's self-leveling range of ±10% grade on both axes eliminates manual setup delays, while the 600-meter diameter working range keeps your crew productive across wide open job sites. Remote control capability through the CR700 receiver means the operator can adjust grade settings from the machine cab without leaving the seat.

Key Specifications

• Grade Range: ±10% on both X and Y axes simultaneously
• Accuracy: ±1.5mm at 30m (±1/16 in. at 100 ft.)
• Working Range: Up to 600m diameter (with CR700 receiver)
• Rotation Speed: 100, 300, or 600 RPM selectable
• Beam Type: Red laser diode, Class IIIa / Class 3R
• Self-Leveling: Automatic within ±10% grade range
• Battery Life: Up to 40 hours on 4 D-cell alkaline batteries
• IP Rating: IP66 dust and water resistant
• Operating Temperature: -20°C to +50°C (-4°F to 122°F)
• Weight: 3.4 kg (7.5 lbs.) with batteries

What's in the Kit

• Spectra Precision GL422N Dual Grade Rotary Laser
• CR700 Laser Receiver with remote grade control capability
• TENTHS Grade Rod (reads in 10ths of a foot for precise elevation checks)
• Receiver mounting bracket and rod clamp
• 4 D-cell alkaline batteries
• Carrying case
• User manual and quick-start guide

Job Site Applications

Parking Lot & Commercial Site Grading: Dial in both the primary drainage slope and the cross slope simultaneously to meet ADA and stormwater management requirements across large paved surfaces without resetting the instrument.

Road Construction & Crown Work: Maintain precise road crown and longitudinal grade for DOT-spec subgrade prep and base course placement. The dual grade capability replaces the need for two separate single-grade setups.

Agricultural Land Leveling: Achieve consistent field grades for irrigation efficiency. The GL422N-1's long working range and remote-adjust feature make it ideal for large-acreage leveling operations.

Drainage Swale & Detention Basin Shaping: Set independent X/Y grades to shape detention ponds and drainage channels accurately, reducing re-work and material waste on finished earthwork.

Compatible Accessories

• Spectra CR700 Laser Receiver (included)
• Spectra HL760 Machine Control Receiver
• Spectra RC703 Remote Control
• Spectra Tripod and Grade Rod Accessories
• Replacement D-Cell Battery Pack

Related Guides

• How to Set Dual Grade with the Spectra GL422N — Step-by-Step Guide
• Rotary Laser Buyer's Guide: Single Grade vs. Dual Grade Explained
• Using a Laser Receiver for Machine Control on Grading Equipment
• How to Read a TENTHS Grade Rod for Site Elevation Checks

Frequently Asked Questions

Can the GL422N-1 set grade in both directions at the same time?

Yes. The GL422N-1 is a true dual grade laser, meaning you can set independent slope percentages on both the X and Y axes simultaneously. This allows you to achieve compound slopes without repositioning the instrument, which is essential for applications like parking lots and road crowns.

Does the CR700 receiver allow remote grade adjustments from a machine cab?

Yes. The CR700 receiver supports two-way communication with the GL422N laser head. Operators can adjust the X or Y grade setting directly from the receiver without walking back to the instrument — a significant productivity advantage when operating grading equipment.

What is the maximum working range of the GL422N-1?

The GL422N-1 has a working diameter of up to 600 meters when used with the included CR700 receiver in good lighting conditions. In bright sunlight, range may be reduced; using the laser's pulse mode and the receiver's digital display helps maintain performance in those conditions.

Is the GL422N-1 waterproof enough for all-weather use?

The GL422N-1 carries an IP66 rating, which means it is fully protected against dust ingress and powerful water jets. It is designed to continue operating through rain and dusty earthwork conditions, making it a reliable choice for outdoor site work in variable weather.