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.
