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Overview
The Spectra Precision LL300S-27 Laser Complete Package is engineered for concrete contractors, site developers, and grading professionals tackling medium-scale projects where accuracy and extended range are non-negotiable. This kit pairs the rugged LL300S self-leveling rotary laser with the premium HL760 digital receiver—one of the most advanced detection units in its class—delivering working ranges up to 2,600 feet diameter and millimeter-level accuracy across applications from foundation leveling to drainage installation.
What sets this package apart is the HL760's dual-axis LCD display and multi-channel operation, allowing multiple crews to work simultaneously without interference while maintaining constant communication with the laser. The included inches-graduated rod eliminates conversion errors on U.S. jobsites, and the complete package arrives ready to deploy—no additional purchases required for standard grade-checking and elevation control tasks.
Key Specifications
- Laser Model: Spectra Precision LL300S with -27 slope-matching capability
- Self-Leveling Range: ±5 degrees with automatic compensator
- Leveling Accuracy: ±1/8 inch at 100 feet (±3 mm at 30 m)
- Working Diameter: Up to 2,600 feet (800 m) with HL760 receiver
- Rotation Speed: 0, 150, 300, 600, 900 RPM (variable speed control)
- Laser Diode: Class 3R visible red beam, 635 nm wavelength
- Receiver Detection Range: 1,300-foot radius (400 m) with HL760
- Receiver Display: Dual-axis LCD with 0.04-inch (1 mm) on-grade indication
- Channel Capacity: Three independent channels for multi-crew operation
- Rod Graduations: Inches with extended 9-foot length
- Power Source: Rechargeable NiMH battery (laser) and alkaline batteries (receiver)
- Operating Time: 30+ hours per charge (laser), 60+ hours (receiver)
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Environmental Rating: IP66 dust-tight and water-resistant
- Shock Resistance: Survives 1-meter tripod tip-over
- Warranty: Three-year manufacturer coverage
What's in the Kit
- LL300S-27 self-leveling rotary laser with slope-matching
- HL760 digital laser receiver with rod clamp
- 9-foot inches-graduated aluminum laser rod
- RC602 full-function remote control (200-foot range)
- Rechargeable NiMH battery pack for laser
- 110V AC battery charger with wall adapter
- Alkaline batteries for HL760 receiver
- Hard-shell carrying case with custom foam inserts
- Laser safety glasses (red beam enhancement)
- Operating manuals and quick-start guide
- Calibration test certificate
Job Applications
- Foundation and Slab Leveling: The HL760's 0.04-inch digital readout enables precise formwork setup and screed guide alignment, ensuring flat concrete pours that meet ACI tolerances without costly grinding or overlays. Variable rotation speeds accommodate both large area pours and tight interior work.
- Site Grading and Excavation: Extended 2,600-foot diameter coverage allows single-setup grading on residential subdivisions and commercial pads. The -27 slope-matching function replicates existing grades for drainage work, parking lots, and building pad preparation without complex calculations.
- Utility Trenching and Drainage: Maintain consistent fall rates for sewer lines, storm drains, and underground utilities with slope-matching accuracy. The HL760's front-and-back dual display lets operators check grade from either trench side without repositioning equipment.
- Retaining Wall and Masonry Layout: Establish level reference lines across long wall runs up to 650 feet from laser centerpoint. The receiver's multi-channel capability allows masons to work elevation control simultaneously with grading crews without signal interference.
- Deck and Framing Elevation Control: The inches rod eliminates metric conversion errors when setting beam heights, ledger boards, and deck framing. Remote control operation lets framers adjust laser height from working positions without ladder trips.
- Interior Drop Ceiling and Soffit Installation: Variable rotation speeds down to 150 RPM provide clear stationary reference points in enclosed spaces. The laser's ±5-degree self-leveling range accommodates setup on uneven floors typical of renovation projects.
Compatible Accessories
Expand system capability with these Spectra Precision accessories:
- HR320 Machine Receiver — grade control for dozers and excavators
- C59 Magnetic Mount Clamp — hands-free receiver positioning on steel
- GL722 Dual-Grade Laser — upgrade for complex slope applications
- Heavy-Duty Detector Clamp — reinforced mount for excavation work
- HL450 Standard Receiver — cost-effective backup detector
- Metric Aluminum Grade Rods — centimeter graduations for mixed projects
Related Guides
- Rotary Laser Setup Guide: Achieving Specification-Grade Accuracy
- Comparison: Spectra LL300S vs. Topcon RL-H5A Laser Levels
- Understanding Laser Receiver Detection Range and Limitations
- Troubleshooting: Laser Calibration Drift and Compensation Errors
Frequently Asked Questions
- What's the practical difference between the HL760 and standard HL450 receiver on this system?
- The HL760 extends detection range by approximately 30% (1,300-foot vs. 1,000-foot radius) and adds dual-axis LCD display with millimeter-level digital readout compared to the HL450's single-axis LED bar graph. The HL760 also includes three-channel operation for multi-crew environments and front-and-back displays, making it essential for larger sites where multiple operators need simultaneous laser access or when working beyond 1,000-foot diameters.
- Can this laser handle single-axis slope for drainage and parking lot work?
- Yes. The -27 designation indicates slope-matching capability on a single axis—you physically tilt the laser head to match an existing grade or create up to 27% slope (approximately 15 degrees). This differs from dual-grade lasers with electronic slope control on two axes. For most drainage, utility, and parking applications requiring consistent fall in one direction, the LL300S-27's manual slope adjustment provides the necessary functionality without the cost premium of dual-grade systems.
- How does the remote control range affect operation on larger sites?
- The RC602 remote provides reliable 200-foot line-of-sight control of all laser functions including on/off, rotation speed, and slope adjustments. On sites exceeding this range, you'll need to walk to within 200 feet of the laser for adjustments, or position the laser more centrally. The HL760 receiver works to 1,300-foot radius, so remote range typically becomes the limiting factor only on sprawling grading projects where laser repositioning would otherwise be infrequent.
- What maintenance intervals does Spectra recommend for the LL300S compensator and leveling accuracy?
- Spectra recommends professional calibration verification annually or after any impact event (drops, tip-overs, or rough transport). The self-leveling compensator uses magnetic dampening with minimal drift under normal use, but construction environments accelerate wear. Field accuracy checks should be performed weekly using the two-position method described in the manual—setup errors cause more elevation problems than actual calibration drift. Keep the battery contacts clean and store the laser in its case when not in use to maximize compensator longevity.
