The Spectra Precision LL300S-CR72 is a complete, contractor-ready rotary laser package engineered for professionals who demand accuracy and efficiency on demanding North American jobsites. Centered around the rugged LL300S self-leveling rotary laser, this configuration pairs an inches-graduated grade rod with the advanced CR700 receiver and a heavy-duty tripod — delivering a fully matched system that eliminates unit-conversion errors between design drawings and field measurements. Whether you are pouring concrete flatwork, cutting drainage slopes, or establishing finish grades, the LL300S-CR72 gives you everything you need to get on grade fast and stay there.
Overview & Jobsite Applications
The LL300S laser is built around Spectra Precision's proven self-leveling technology, compensating automatically within a ±5° range so crews spend less time setting up and more time working. With a working range of up to 2,200 feet in diameter (with the CR700 receiver), this package is equally at home on large site grading operations and tight residential drainage projects. The inches-graduated rod included in the CR72 configuration aligns directly with inch-based specifications standard to drainage design sheets, concrete slab drawings, and landscape grading plans across North America — eliminating the translation step that slows production and introduces error.
Key Specifications
- Model: LL300S-CR72
- Self-Leveling Range: ±5°
- Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
- Working Range: Up to 2,200 ft diameter with CR700 receiver
- Rotation Speed: 150, 300, or 600 RPM selectable
- Grade Range: 0% to ±25% on single axis
- IP Rating: IP66 — dust-tight and water-jet resistant
- Battery Life: Up to 60 hours on alkaline D-cells
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Laser Class: Class II, 635 nm visible red beam
What's in the Kit
- Spectra Precision LL300S self-leveling rotary laser transmitter
- CR700 Deluxe Multi-Use Receiver — dual-beam and scanning modes for leveling and slope verification in a single setup
- Inches-Graduated Grade Rod — matches inch-based design documentation for zero-conversion field work
- Heavy-Duty Tripod — stable, contractor-grade aluminum tripod for consistent elevation holds
- Protective Carrying Case — custom-fit hard case for safe transport and storage of all components
- Batteries and operator documentation included
Job Applications
Concrete Flatwork & Slab Work: Set the LL300S on a tripod at a known benchmark and use the CR700 receiver on the grade rod to verify sub-base elevation and screed rail height to within 1/16 in. at 100 ft — the precision concrete finishing crews require.
Drainage & Stormwater Grading: Program a single-axis slope directly into the LL300S to match drainage design grades. The CR700's scanning mode confirms grade across the full swath in a single instrument setup, eliminating repeated re-shots.
Landscape & Site Grading: The long battery life and wide 2,200 ft working diameter keep the instrument running through full production days on large residential or commercial site grading operations without repositioning.
Utility Trench & Pipe Grade: Mount the CR700 to a trench rod or pipe laser target bracket and use slope mode to maintain consistent invert grades for gravity sewer, storm drain, and irrigation mainline installation.
Compatible Accessories
- Spectra Precision CR700 Replacement Receiver
- Spectra Precision HL760 Laser Detector
- Grade Rod Extension Sections
- Heavy-Duty Tripod Replacement
- Spectra Precision RC703 Remote Control
- Protective Laser Carry Case
Related Guides
- How to Set Grade with a Rotary Laser Level
- Rotary Laser vs. Pipe Laser: Which Do You Need?
- Setting Up a CR700 Receiver for Slope Mode
- Rotary Laser Accuracy Guide for Concrete Contractors
Frequently Asked Questions
- Can the LL300S-CR72 be used outdoors in direct sunlight?
- Yes. The CR700 receiver is designed for outdoor use in bright sunlight conditions. The receiver detects the laser beam electronically and provides both audible and visual grade indicators, so direct sun does not impair operation the way it would with a naked-eye visible beam setup.
- What is the difference between the CR72 and other LL300S package configurations?
- The CR72 designation indicates this package includes an inches-graduated grade rod, making it the preferred choice for contractors working from inch-based North American design drawings. Other configurations may include metric rods or alternate receiver models. All packages include the same LL300S transmitter and CR700 receiver.
- Does the LL300S support dual-axis slope?
- The LL300S supports single-axis grade matching — ideal for drainage slopes and grading applications. For dual-axis grade capability, Spectra Precision offers the LL500 series. Single-axis is sufficient for the majority of site grading, drainage, and concrete flatwork applications.
- Is the LL300S-CR72 covered under warranty?
- Spectra Precision provides a standard limited warranty on the LL300S transmitter and CR700 receiver. As an authorized dealer, Express Tools supports warranty service coordination. Contact our team for current warranty terms and service center information specific to your region.
Frequently Asked Questions
Can the LL300S-CR72 be used outdoors in direct sunlight?
Yes. The CR700 receiver is designed for outdoor use in bright sunlight conditions. The receiver detects the laser beam electronically and provides both audible and visual grade indicators, so direct sun does not impair operation the way it would with a naked-eye visible beam setup.
What is the difference between the CR72 and other LL300S package configurations?
The CR72 designation indicates this package includes an inches-graduated grade rod, making it the preferred choice for contractors working from inch-based North American design drawings. Other configurations may include metric rods or alternate receiver models. All packages include the same LL300S transmitter and CR700 receiver.
Does the LL300S support dual-axis slope?
The LL300S supports single-axis grade matching — ideal for drainage slopes and grading applications. For dual-axis grade capability, Spectra Precision offers the LL500 series. Single-axis is sufficient for the majority of site grading, drainage, and concrete flatwork applications.
Is the LL300S-CR72 covered under warranty?
Spectra Precision provides a standard limited warranty on the LL300S transmitter and CR700 receiver. As an authorized dealer, Express Tools supports warranty service coordination. Contact our team for current warranty terms and service center information specific to your region.
