Spectra Precision LL300N-2 Laser Package INCHES-Rod and Tripod

Overview

The Spectra Precision LL300N-2 Laser Package is built for contractors who establish grade on excavation sites, concrete pads, drainage systems, and foundation work where accuracy and durability matter more than feature density. Surveyors, site superintendents, and one-person grading crews use this self-leveling rotary laser to set reference elevations quickly across job sites up to 1,000 feet in diameter. This complete kit includes the LL300N laser, HL450 dual-slope digital receiver with rod clamp, 15-foot telescoping aluminum grade rod scaled in inches and eighths, adjustable-height tripod, and hard-shell carrying case—everything needed to shoot grade the day it arrives. Unlike entry-level lasers that drift in temperature swings or fail when bumped, the LL300N maintains ±3/32-inch accuracy at 100 feet even when job site traffic shakes the ground, thanks to its self-leveling compensator and automatic out-of-level shutdown. Contractors choose this package when they need reliable horizontal and single-slope reference without the complexity or cost of dual-grade systems, particularly on residential foundations, parking lot subgrades, utility trenching, and agricultural land leveling where repeatability across multiple setups reduces callbacks and rework.

Key Specifications

• Accuracy: ±3/32 inch at 100 feet (±2.5 mm at 30 m)
• Leveling Range: ±5 degrees self-leveling with auto shutdown beyond range
• Working Diameter: Up to 1,000 feet (300 m) with HL450 receiver
• Rotation Speed: 600 RPM (suitable for concrete screeding and general grading)
• Slope Capability: Manual single-axis slope up to 8% in 0.1% increments
• Power Source: Rechargeable NiMH battery pack (included); 100+ hour runtime per charge
• Receiver Detection Range: 1,000-foot diameter (HL450 front and back sensors)
• Receiver Accuracy: ±1/16 inch with digital LCD and audible indicators
• Rod Graduations: Inches and eighths; 15-foot extended height, 5-section telescoping aluminum
• Tripod: Adjustable 40–65 inches, flat head with 5/8 × 11 thread
• Environmental Rating: IP66 dust-tight and water-resistant (withstands rain and washdown)
• Operating Temperature: –20°F to 122°F (–30°C to 50°C)
• Warranty: 3-year manufacturer warranty on laser and receiver

What's in the Kit

• Spectra Precision LL300N self-leveling rotary laser transmitter
• HL450 digital laser receiver with rod clamp and integrated display
• 15-foot aluminum grade rod (5-section telescoping, inch graduations)
• Adjustable-height aluminum tripod with flat head mounting plate
• Rechargeable NiMH battery pack for laser
• Alkaline battery tray (backup power option)
• AC wall charger with regional plug adapter
• Remote control for slope adjustment and laser functions
• Hard-shell carrying case with custom foam inserts
• Operator manual and quick-start guide
• Calibration certificate and warranty registration card

Job Applications

• Residential Foundation Excavation: Set perimeter string lines and verify footings at consistent depth before concrete pour; the HL450 receiver mounts on excavator blade receivers or handheld rod checks, eliminating repeated string measurements and ensuring ACI tolerance compliance across the entire pad.
• Parking Lot and Flatwork Grading: Establish subgrade elevation for asphalt or crusher base; the 600 RPM rotation speed provides visible reference for skid-steer operators working 200+ feet from the laser, while single-axis slope mode handles positive drainage runs without complex dual-grade programming.
• Drainage Swale and French Drain Installation: Maintain 1–2% fall over long runs by setting slope mode and using the receiver to verify trench bottom every 10 feet; the IP66 rating protects the laser when unexpected rain hits mid-job, and the long battery life supports all-day trenching without recharge breaks.
• Concrete Slab Screeding: Mount the laser at mid-slab and use tripod-mounted receiver to set screed rails at precise elevation; contractors pouring garage floors, warehouse pads, or barn slabs rely on the ±3/32-inch accuracy to meet flatness specs without expensive laser screeds on smaller projects under 5,000 square feet.
• Utility Trench Grade Control: Verify sewer, storm, and conduit trench slopes during excavation; the receiver's audible beep confirms on-grade status even when the operator can't see the display in deep trenches, reducing over-excavation and imported backfill costs on linear projects.
• Agricultural Land Leveling: Grade fields for flood irrigation or surface drainage; the 1,000-foot working diameter covers most field widths in a single setup, and the rugged construction survives dusty conditions and vibration from tractors and land planes working nearby.

Compatible Accessories

Spectra HL700 Machine Receiver – Dual-display receiver with magnetic mount for excavator and dozer blade control

Spectra RC402N Remote Control – Replacement or spare remote for slope and rotation adjustments

Universal Laser Detector Clamp – Reinforced aluminum clamp fits grade rods and stakes up to 1.5 inches

25-Foot Aluminum Grade Rod (Inches) – Extended-height rod for deep excavations and tall foundation walls

Heavy-Duty Laser Tripod – Reinforced tripod with wider leg spread for unstable or sloped ground

Spectra Alkaline Battery Tray – Spare battery tray for backup power in remote locations

Related Guides

How to Set Slope on Spectra Rotary Lasers – Step-by-step instructions for single-axis and dual-axis grade setup

Spectra LL300N vs. LL400 Comparison – Feature and specification comparison to help choose the right model

Rotary Laser Won't Self-Level – Common Causes – Diagnostic steps when the compensator fails to lock

Laser Receiver and Grade Rod Techniques for Accurate Readings – Best practices for rod placement, receiver positioning, and reading interpretation

Frequently Asked Questions

Can the LL300N be used for vertical layout or plumb applications?

No, the LL300N is a horizontal-only rotary laser designed for grade and elevation work. It does not have a vertical beam mode. For plumb, wall layout, or 90-degree reference applications, consider the Spectra LL500 which offers horizontal, vertical, and plumb beam modes in a single unit.

What is the effective range when using the laser without a receiver in bright sunlight?

The visible laser beam is effective to approximately 50–75 feet in direct sunlight when viewed directly on a target or grade rod. For reliable grade control beyond 75 feet or in bright conditions, the HL450 receiver extends working range to 1,000 feet diameter (500-foot radius) and provides precise on-grade detection regardless of ambient light.

How often does the LL300N require calibration, and can it be done in the field?

Spectra recommends annual calibration or after any significant impact or drop. Field calibration is not user-serviceable; the laser must be sent to a Spectra-authorized service center with proper leveling plates and optical test equipment. Most contractors schedule calibration during winter downtime or when accuracy checks against benchmark elevations show drift beyond ±3/32 inch at 100 feet.

Is the included grade rod compatible with metric receivers or lasers sold outside North America?

The 15-foot rod in this package is scaled in inches and eighths, designed for imperial measurement systems. The HL450 receiver works with any rotary laser beam regardless of region, but the rod graduations will require manual conversion if your workflow uses metric plans. Metric-scaled rods are available separately; contact us for centimeter-graduated rod options compatible with the HL450 clamp.