SitePro SLR202GR Dial-IN Dual Grade Rotary Laser

The SitePro 27-SLR202GR Dual Grade Rotary Laser is purpose-built for contractors who need accurate, repeatable control over two independent slope planes simultaneously. Whether you're cutting drainage swales, establishing parking lot cross-falls, or grading roadway crowns, the SLR202GR lets you dial in exact grade percentages on both X and Y axes without guesswork. This is a production-grade tool designed for the demands of daily site work.

Overview & Jobsite Applications

Multi-directional grading projects demand more than a standard self-leveling rotary laser. The SitePro SLR202GR addresses that need with independent dual-axis grade control, allowing crews to establish complex slope intersections in a single setup. Earthwork operators, utility contractors, and paving crews rely on the SLR202GR to eliminate costly re-work caused by improper drainage grades. The system pairs with a compatible grade rod and receiver for machine control or hand-grade verification across large sites.

Key Specifications

• Grade Range (X-Axis): ±10% dial-in grade
• Grade Range (Y-Axis): ±10% dial-in grade
• Self-Leveling Range: ±5° automatic compensation
• Working Range: Up to 2,000 ft diameter (with receiver)
• Rotation Speed: Selectable — low, medium, high RPM
• Laser Class: Class IIIa / 3R, 635nm red beam
• Accuracy: ±1/16 in. at 100 ft
• Power Source: Rechargeable battery pack + AC adapter
• Battery Life: Up to 40 hours continuous operation
• Ingress Protection: IP56 dust and water resistant
• Tripod Mount: Standard 5/8 in. x 11 thread

Key Features

• Dual Grade Dial: Independent X and Y axis grade adjustment with clearly marked percentage increments
• Auto Self-Leveling: Powers up and levels automatically within the 5° compensation range
• Out-of-Level Alarm: Audible and visual alert if the instrument is bumped or disturbed mid-job
• Selectable Rotation Speed: Match beam speed to receiver sensitivity and ambient light conditions
• Rugged Housing: IP56-rated enclosure handles rain, mud, and dust on active grading sites
• Remote Control Ready: Compatible with SitePro wireless remote for grade adjustments from the machine cab
• Long Battery Runtime: 40-hour battery life supports full shift operation without recharging

Job Applications

Parking Lot Drainage: Set a precise cross-slope and longitudinal fall simultaneously to direct runoff to catch basins and prevent ponding — a common callback issue when grades are set by eye.

Roadway Crown & Subgrade: Establish symmetrical crown grades across both lanes from a single instrument setup, keeping subgrade prep on spec before paving crews arrive.

Site Prep & Rough Grading: Control cut-and-fill operations across large pads where drainage must meet engineered slope requirements in multiple directions before inspection.

Retention Pond & Swale Grading: Dial in bottom-of-swale grades and side slopes independently to meet stormwater design requirements without multiple instrument moves.

Compatible Accessories

• SitePro Laser Receiver — HR320 Wide-Range Receiver
• SitePro Wireless Remote Control for Rotary Lasers
• SitePro Grade Rod & Target Set
• Heavy-Duty Tripod with Adjustable Leg Locks
• SitePro Rotating Laser Carrying Case

Related Guides

• How to Set Dual Grade with a Rotary Laser — Step-by-Step Field Guide
• Rotary Laser vs. Pipe Laser: Choosing the Right Tool for Drainage Work
• Understanding Laser Accuracy Specs: What ±1/16 in. at 100 ft Means on the Job

Frequently Asked Questions

Can the SLR202GR control grade in both directions at the same time?

Yes. The SLR202GR provides independent dial-in adjustment on both the X and Y axes, allowing you to simultaneously establish cross-slope and longitudinal grade from a single instrument position. Each axis adjusts up to ±10%.

Does this laser work with a machine control receiver on a motor grader or dozer?

The SLR202GR is compatible with SitePro-approved grade receivers and, when paired with a wireless remote, allows grade adjustments from the cab. Confirm machine control interface compatibility with your specific receiver and display system before purchase.

What happens if the laser gets knocked out of level during grading?

The SLR202GR features an out-of-level alarm that triggers an audible beep and shuts down rotation if the instrument is disturbed beyond its 5° compensation range, alerting your crew before bad grades are cut.

Is the SLR202GR suitable for outdoor use in rain?

Yes. The unit carries an IP56 ingress protection rating, meaning it resists dust ingress and water jets from any direction — appropriate for most active grading site conditions. Avoid full submersion.