Professional Grade Control for Large-Scale Jobsites
The Spectra Precision LL300S-RC8 is the remote-capable evolution of the trusted LL300S-8 rotary laser platform, purpose-built for professional contractors who need to manage grade and elevation checks across expansive, active job sites without walking back to the instrument. Paired with the RC8 wireless remote control and the HR320 machine-mount receiver, this kit delivers a complete system for establishing laser reference planes fast, accurately, and efficiently — whether you're grading a parking lot, setting concrete forms, or coordinating multiple crews on a large commercial build.
Rotary Laser Built for Real Jobsite Conditions
On large construction sites, time spent walking between the instrument and a grade rod costs money. The LL300S-RC8 solves that problem by putting full instrument control in the operator's hand at any point within the jobsite. Activate the laser, adjust grade, and confirm elevation without leaving the work area. The LL300S platform has earned its reputation among grading contractors, concrete crews, and site superintendents for its rugged construction, fast self-leveling, and reliable accuracy — and the RC8 configuration adds a workflow advantage that pays off on every large-scale pour or grade check.
Key Specifications
- Model: Spectra Precision LL300S-RC8
- Laser Class: Class IIIa / 3R red beam
- Accuracy: ±1/16 in at 100 ft (±1.5 mm at 30 m)
- Self-Leveling Range: ±5°
- Working Range: Up to 2,000 ft diameter with HR320 receiver
- Rotation Speed: 100, 300, 600 RPM
- Remote Control Range: Up to 300 ft (RC8 wireless remote)
- Battery Life: Up to 100 hours (4 x AA alkaline)
- IP Rating: IP66 dust and water resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Tripod Thread: 5/8 x 11
What's in the Kit
- Spectra Precision LL300S rotary laser head
- RC8 wireless remote control unit
- HR320 laser receiver with magnetic bracket and clamp
- Receiver carrying case
- Alkaline batteries (4 x AA)
- Nylon carrying case
- Operator's manual and quick-start guide
Job Applications
- Grading and Site Work: Establish accurate grade planes across large lots and keep earthmoving equipment on grade without repeated instrument checks — ideal for operators using the HR320 mounted on a blade or scraper.
- Concrete Flatwork and Forming: Set and verify form heights with precision before and during concrete pours. The remote control lets one operator confirm elevation at the rod without a second crew member at the laser.
- Foundation Layout: Use the 360° reference plane to set consistent elevation benchmarks at multiple corners of a foundation, reducing setup time and improving overall accuracy across the structure.
- Commercial Interior Fit-Out: Establish a consistent height reference for suspended ceilings, mechanical runs, and framing on large floor plates where walking to the laser would interrupt workflow.
Compatible Accessories
- Spectra Precision HR320 Laser Receiver — replacement or additional receiver for multi-crew sites
- Spectra Precision RC8 Wireless Remote Control — replacement remote for the LL300S-RC8
- Spectra Precision LL300S Carrying Case — heavy-duty protective transport case
- Universal Laser Tripod (5/8 x 11) — stable instrument mounting for any terrain
- Grade Rod / Leveling Rod — compatible with HR320 receiver bracket for elevation checks
Related Guides
Frequently Asked Questions
- What is the working range of the LL300S-RC8?
- With the included HR320 receiver, the LL300S-RC8 has a working diameter of up to 2,000 feet, making it well-suited for large grading, paving, and commercial construction sites. Naked-eye visibility of the red beam is limited to about 200 feet in typical daylight conditions, so the receiver is essential for outdoor use.
- How far does the RC8 remote control work?
- The RC8 wireless remote operates at distances up to 300 feet from the instrument, giving operators the ability to activate, deactivate, and adjust the laser from across a standard jobsite without returning to the tripod.
- Is the LL300S-RC8 waterproof?
- Yes. The LL300S-RC8 carries an IP66 rating, meaning it is fully protected against dust ingress and powerful water jets. It is designed to continue operating in rain and dusty site conditions without damage to the instrument.
- Can the LL300S-RC8 be used for indoor work?
- Yes. While the LL300S-RC8 is optimized for large outdoor applications, it performs well on expansive interior projects such as warehouse floors, large commercial fit-outs, and multi-bay industrial buildings where long-range elevation references are needed.
