Built for the Demands of Real Jobsite Work
The Spectra Precision LL300S-6 is a professional-grade self-leveling rotary laser level engineered for construction crews who need reliable, repeatable elevation control across medium-to-large work areas. Whether you're grading a parking lot, laying a foundation, or setting drainage slopes, the LL300S-6 delivers the accuracy and durability your team depends on. This complete package includes the LL300S laser with the CR700 machine-mount compatible receiver, giving you everything needed to get on grade fast.
Jobsite Overview & Applications
The LL300S-6 is designed for outdoor horizontal leveling tasks where speed, reliability, and range matter. With an operating range of up to 2,600 feet in diameter when used with the CR700 receiver, this tool covers large commercial pads, road grading corridors, and multi-lot residential developments without repositioning. The IP66-rated enclosure handles rain, dust, and the general abuse of active construction environments. The automatic self-leveling compensator gets the instrument plumb and level within seconds, reducing setup time and operator error on busy sites.
Key Specifications
- Operating Range: Up to 2,600 ft (800 m) diameter with CR700 receiver
- Accuracy: ±1/16 in at 100 ft (1.5 mm at 30 m)
- Self-Leveling Range: ±5°
- Rotation Speed: 150, 300, or 600 RPM selectable
- Grade Capability: Manual grade in X and/or Y axis
- Beam Visibility: Red visible laser diode
- Power Source: 4 x D-cell alkaline batteries
- Battery Life: Up to 100 hours
- IP Rating: IP66 — dust-tight and protected against heavy water jets
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Included Receiver: Spectra Precision CR700
What's in the Kit
- Spectra Precision LL300S rotary laser level unit
- CR700 laser receiver with clamp mount
- Alkaline battery set (4 x D-cell)
- Carrying case with foam-lined interior
- Quick-start guide and operator documentation
Job Applications
Site Grading & Earthwork: Set consistent cut and fill grades across large pads with the machine-mounted CR700. Operators on dozers and motor graders can work independently once grade is established, improving cycle times and reducing re-work.
Foundation & Footing Layout: Use the LL300S-6 to establish a level datum for forming crews. Transfer elevations to batter boards and form stakes with consistent accuracy across the full perimeter of residential and light commercial foundations.
Concrete Flatwork: Control slab elevations on warehouse floors, driveways, and parking areas. The selectable rotation speed allows the beam to be optimized for detector response time and ambient light conditions.
Landscape & Drainage Construction: Establish positive drainage slopes, swale grades, and retention basin elevations with a single instrument setup. The manual grade feature enables slope work without secondary instruments.
Compatible Accessories
- Spectra Precision CR700 Replacement Receiver
- Spectra Precision HL760 Heavy-Duty Grade Rod
- Spectra Precision Aluminum Tripod for Rotary Lasers
- Spectra Precision RC601 Remote Control
- Replacement D-Cell Battery Pack (4-Pack)
- Spectra Precision Laser Target Card
Related Guides
- How to Set Up a Rotary Laser Level on a Construction Site
- LL300S-6 vs. LL500: Which Spectra Laser Is Right for Your Project?
- Using a Machine-Mount Receiver for Grade Control
- Rotary Laser Level Maintenance and Calibration Tips
Frequently Asked Questions
- What is the effective working range of the LL300S-6?
- When paired with the included CR700 receiver, the LL300S-6 has an operating diameter of up to 2,600 feet (800 meters). This is sufficient for most commercial grading, paving, and site development applications without needing to reposition the instrument.
- Can the LL300S-6 be used for slope or grade work?
- Yes. The LL300S-6 features manual grade adjustment in both the X and Y axes, allowing operators to set a specific slope angle for drainage, road crowning, or ramp construction. Grade is set manually on the instrument rather than via remote or digital input.
- Is the LL300S-6 suitable for use in rain or dusty conditions?
- The LL300S-6 carries an IP66 ingress protection rating, meaning it is completely dust-tight and protected against powerful water jets from any direction. It is built for outdoor use in active construction environments and typical weather conditions.
- Does this package include everything needed to start working?
- Yes. The LL300S-6 package includes the laser level unit, CR700 receiver with mounting clamp, batteries, and a carrying case. You will need a tripod or grade rod to mount the laser at the appropriate height, both of which are available separately on our site.
