Professional Horizontal Rotary Laser Ready for the Jobsite
The SitePro 27-LR410H-4C is a contractor-grade horizontal rotary laser system engineered for demanding site work. Delivered as a complete, ready-to-use kit, this package eliminates the hassle of sourcing accessories separately — everything you need to establish a precise level plane is included straight out of the box. Whether you're grading a large commercial pad, pouring a concrete slab, or setting elevation benchmarks across a sprawling site, the LR410H delivers the accuracy and reliability professionals depend on every day.
System Overview & Jobsite Applications
At the heart of this kit is the SitePro LR410H horizontal rotary laser, capable of projecting a full 360-degree level plane with a working range of up to 800 feet in diameter when paired with a compatible laser detector. The automatic self-leveling compensator locks in accuracy quickly and re-levels automatically if the instrument is disturbed, keeping your crew moving without constant recalibration. The variable speed rotation control lets you dial in the right sweep rate for visibility in any lighting condition. The package pairs the laser head with a 13-foot fiberglass measuring rod graduated in inches and eighths — ideal for crews working in imperial units — and a heavy-duty aluminum tripod that provides a stable, vibration-dampening base on uneven terrain.
Key Specifications
- Model: SitePro 27-LR410H-4C
- Laser Class: Class IIIa / Class 3R
- Working Range: Up to 800 ft diameter (with detector)
- Self-Leveling Range: ±5°
- Accuracy: ±1/16 in at 100 ft
- Rotation Speed: Variable (slow, medium, fast settings)
- Power Source: Rechargeable battery pack or standard alkaline batteries
- Battery Life: Up to 40 hours (alkaline)
- IP Rating: Weather-resistant construction for outdoor use
- Rod Graduation: Inches and eighths (imperial)
- Tripod: Heavy-duty aluminum, adjustable
What's Included in the Kit
- SitePro LR410H horizontal rotary laser unit
- 13-foot fiberglass grade rod — inches/eighths graduations
- Heavy-duty adjustable aluminum tripod
- Laser detector (model-specific, check kit contents)
- Carrying case for laser head and accessories
- Rechargeable battery pack and charger
- Operator's manual and calibration certificate
Job Applications
Site Grading & Earthwork: Establish a consistent elevation reference across large areas with a single instrument setup. The 800-ft working diameter covers most commercial and residential grading projects without moving the instrument.
Concrete Flatwork & Slabs: Set screed rails, pour stops, and form elevations with confidence. The ±1/16-in accuracy at 100 ft meets flatwork tolerances for both structural and finish slabs.
Foundation Layout: Use the level plane to verify footing elevations and confirm that foundation forms are set to consistent height before the pour.
Drainage & Utility Slope Work: While the LR410H is a horizontal-only unit, it provides the level reference needed to calculate and verify consistent slope grades across drainage swales, pipe trenches, and retention basins.
Compatible Accessories
- SitePro Laser Detector / Receiver
- SitePro Detector Clamp for Grade Rod
- Replacement Rechargeable Battery Pack
- Heavy-Duty Laser Carrying Case
- Metric Fiberglass Grade Rod (alternative rod option)
- Wall Mount Bracket for Interior Applications
Related Guides
- How to Set Up a Rotary Laser for Site Grading
- Rotary Laser vs. Line Laser: Choosing the Right Tool
- How to Read a Grade Rod for Elevation Work
- Rotary Laser Maintenance & Calibration Best Practices
Frequently Asked Questions
- Does the SitePro 27-LR410H-4C work in bright outdoor sunlight?
- The LR410H laser beam is not typically visible to the naked eye in direct sunlight. For full-range outdoor use, pair the unit with the included or compatible laser detector, which picks up the beam accurately at distances up to 800 feet regardless of ambient light conditions.
- Is this a self-leveling laser or does it require manual leveling?
- The LR410H features an automatic self-leveling compensator with a ±5° working range. Simply set the instrument on the tripod and rough-level using the adjustable legs — the laser will automatically fine-level itself within seconds. If the unit is disturbed beyond that range, it will alarm and re-level once repositioned.
- Can this laser be used for interior construction work?
- Yes. While the LR410H is built for large outdoor sites, it works well in large interior spaces such as warehouses, commercial floors, and gymnasium slabs. For smaller interior rooms, a line laser or combination laser may be a more practical choice.
- What is the difference between the 4C package and other SitePro LR410H configurations?
- The "4C" designation indicates this is a complete four-component kit including the laser, grade rod with inches graduations, aluminum tripod, and detector. Other configurations may include metric rods, different detector models, or be sold as laser-only units. The 4C package is the most common choice for crews wanting a turnkey imperial-unit setup.
