Overview
The Spectra Precision LL300N-3 Laser Package is engineered for contractors, site supervisors, and construction professionals who need reliable horizontal leveling on commercial builds, roadwork, and civil infrastructure projects. This complete metric system includes the LL300N self-leveling rotary laser, HL450 laserometer receiver with magnetic mount, GR153 15-foot metric grade rod, and heavy-duty aluminum tripod. Whether you're establishing foundation elevations, setting drainage slopes, or checking flatwork, this package delivers the accuracy, durability, and convenience required for demanding jobsites. The self-leveling mechanism saves setup time, while the included receiver extends detection range up to 500 meters diameter, making it ideal for large-scale grading and site development where precise horizontal reference is critical across extended distances.
Key Specifications
- Leveling Accuracy: ±1.5mm at 30 meters (±1/16" at 100 feet)
- Self-Leveling Range: ±5 degrees with automatic shut-off if exceeded
- Working Diameter: Up to 500m (1,640 feet) with HL450 receiver
- Rotation Speed: 0, 150, 300, 600 RPM (variable)
- Power Source: Rechargeable NiMH battery (included) or alkaline batteries
- Runtime: Up to 60 hours on single charge
- Operating Temperature: -20°C to 50°C (-4°F to 122°F)
- IP Rating: IP66 dust-tight and water-resistant
- Receiver Detection Range: 2mm to 500m diameter
- Grade Rod Markings: Metric graduations in centimeters/millimeters
- Tripod Height Range: 1.0m to 2.9m extended
- Warranty: 3-year manufacturer warranty on laser unit
What's in the Kit
- LL300N Self-Leveling Rotary Laser with protective housing
- HL450 Laserometer Receiver with LCD display and magnetic bracket
- GR153 15-Foot Metric Grade Rod with telescoping sections
- Heavy-Duty Aluminum Tripod with adjustable legs and quick-clamp system
- Rechargeable NiMH Battery Pack with charger and AC adapter
- Protective Hard-Shell Carrying Case for laser and receiver
- Target Plate for short-range interior applications
- Operating Instructions and Quick Reference Guide
- Calibration Certificate documenting factory accuracy testing
Job Applications
- Foundation and Footing Layout: Establish consistent elevation benchmarks across foundation perimeters to ensure level pours and eliminate low spots that compromise structural integrity on multi-building commercial developments.
- Site Grading and Excavation: Set precise grade references for earthmoving equipment operators to achieve proper drainage slopes and pad elevations on large site developments where GPS systems may be cost-prohibitive or unavailable.
- Concrete Slab Placement: Verify deck elevations and screed heights during flatwork installation to maintain uniform thickness, prevent material waste, and ensure ADA-compliant slopes on parking structures and warehouse floors.
- Drainage and Utility Trenching: Guide excavation depths and pipe invert elevations for storm sewer, sanitary lines, and underground utilities where gravity flow requires precise fall rates over extended distances.
- Suspended Ceiling Installation: Transfer level references around interior perimeters to align grid systems and ensure acoustical tile planes remain consistent across large open-plan offices and retail spaces.
- Roadway and Paving Projects: Set curb heights, base course elevations, and cross-slope references on highway construction and parking lot grading where uniform surface drainage prevents ponding and premature pavement failure.
Compatible Accessories
RC402N Remote Control | HL700 Digital Receiver Upgrade | Universal Receiver Clamp for Machine Control | Fiberglass Grade Rod Alternative | Heavy-Duty Flat-Head Tripod | Alkaline Battery Tray Backup Power | Laser Enhancement Glasses
Related Guides
Rotary Laser Setup Best Practices for Accuracy | Spectra LL300N vs Topcon RL-H5A Comparison | Maximizing Laser Receiver Detection Range | Self-Leveling Laser Error Codes and Solutions
Frequently Asked Questions
- Can the LL300N-3 be used for vertical layout work or plumb applications?
- The LL300N operates exclusively in horizontal self-leveling mode and cannot be oriented vertically for plumb reference. For vertical alignment tasks like column layout, wall straightness checks, or elevator shaft plumbing, consider the dual-slope LL400 series or dedicated vertical-horizontal models like the LL500 that include axis-lock functionality for 90-degree orientation.
- What's the effective range difference between using the laser visible beam versus the HL450 receiver?
- The visible red beam is detectable by eye up to approximately 30 meters indoors under normal lighting and less in bright outdoor conditions. The HL450 laserometer receiver extends detection diameter to 500 meters, making it essential for exterior grading, large commercial foundations, and civil projects where visual beam detection becomes impractical beyond short distances.
- How does the metric grade rod benefit users working on international projects or metric-based plans?
- The GR153 metric rod displays centimeter and millimeter graduations that directly correspond to architectural and engineering drawings produced in metric units, eliminating conversion errors and calculation delays. This is particularly valuable on projects with international design teams, Canadian jobsites, or infrastructure work where specifications are issued in SI units rather than imperial measurements.
- Is annual calibration required to maintain the 3-year warranty coverage?
- Spectra Precision does not mandate annual calibration for warranty validity, but recommends verification testing every 6-12 months depending on usage intensity and jobsite conditions. Instruments subjected to frequent transport, drops, or extreme environments should undergo professional calibration more frequently to ensure the ±1.5mm accuracy specification remains within tolerance for critical layout work.
