The Spectra Precision LL300S-RC48-PRO is a professional-grade red beam rotary laser kit engineered for contractors who need accurate, fast setups and remote-operated grade control on demanding jobsites. Combining the proven LL300S laser platform with the HR320 digital receiver and the RC402N wireless remote, this kit lets a single operator manage elevation shots and grade settings without leaving the machine or walking back to the instrument — a genuine productivity multiplier on grading, site prep, and foundation work.
Built for Real Jobsite Conditions
The LL300S-RC48-PRO is optimized for contractors working on horizontal leveling and single-axis grade applications including site grading, concrete flatwork, drainage installation, landscaping, and interior fit-out. The instrument's robust housing handles the dust, vibration, and temperature swings of outdoor construction, while the self-leveling system gets you on grade in seconds. Whether you're setting finished floor elevations on a commercial slab or establishing drainage fall across a parking lot, this kit delivers the accuracy and range to get it done right the first time.
Key Specifications
- Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
- Self-Leveling Range: ±5°
- Working Range: Up to 2,000 ft (600 m) diameter with receiver
- Rotation Speed: 100, 300, 600 RPM selectable
- Grade Range: 0% to ±25% on single axis
- Beam Type: Red visible laser diode
- IP Rating: IP66 — dust-tight and water-resistant
- Battery Life: Up to 70 hours on rechargeable NiMH battery pack
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Weight: Approximately 4.0 lbs (1.8 kg) with battery
What's in the LL300S-RC48-PRO Kit
- LL300S Rotary Laser: Self-leveling, dual-grade capable red beam laser instrument
- HR320 Digital Receiver: Long-range receiver with audible and visual grade indication, compatible with remote operation
- RC402N Wireless Remote Control: Allows single-operator control of instrument settings, grade values, and on/off from up to 330 ft (100 m)
- Rechargeable NiMH Battery Pack: Long-life rechargeable pack with AC wall charger included
- Receiver Clamp: Adjustable rod clamp for the HR320, compatible with standard grade rods and staffs
- Carrying Case: Molded hard-shell case for transport and storage of all kit components
- User Manual and Warranty Card
Job Applications
- Site Grading and Earthwork: Set your LL300S on a tripod at the center of the site, dial in the design grade via the RC402N from the blade or scraper, and work the entire cut-fill operation without a second person holding the rod — saving labor on every shift.
- Concrete Flatwork and Slab Pours: Establish precise finished floor or subbase elevations across large slab areas. The HR320's clear audible signal lets rod men work independently while the foreman monitors pour progress elsewhere on the deck.
- Drainage and Utility Trenching: Program a consistent slope percentage for storm drain, sanitary, or irrigation trenching. The remote lets the excavator operator verify depth and grade from the cab without stopping work for manual checks.
- Interior Leveling and Suspended Ceilings: Drop rotation speed to 100 RPM and use the red beam for interior layout, suspended ceiling grids, and partition alignment where a visible sweep line speeds layout without chalk lines.
Compatible Accessories
Frequently Asked Questions
- How far away can I operate the RC402N remote control?
- The RC402N wireless remote has an effective range of up to 330 ft (100 m) under typical site conditions, allowing a single operator to adjust grade settings, rotation speed, and power state from the machine or scraper without returning to the instrument.
- Is the LL300S-RC48-PRO suitable for outdoor use in bright sunlight?
- Yes. While the red beam is most visible in low-light and indoor conditions, the included HR320 digital receiver extends the working range to 2,000 ft in full daylight. The receiver's audible and LED grade indicators let you work accurately outdoors without needing to see the beam itself.
- Can the LL300S run on standard AA or D-cell batteries?
- The RC48-PRO kit includes a rechargeable NiMH battery pack that delivers up to 70 hours of runtime per charge. The LL300S platform is also compatible with an optional alkaline battery holder for jobsites where recharging isn't convenient — contact us to confirm current adapter availability.
- What is the grade range on the LL300S, and how is it set?
- The LL300S supports single-axis grade from 0% up to ±25%. Grade is set directly on the instrument's keypad or — in this PRO kit configuration — remotely via the RC402N, which lets you increment grade values without touching the laser head. Two-axis simultaneous grade is not supported on this model; for dual-grade applications, consider the Spectra Precision LL500 series.
Frequently Asked Questions
How far away can I operate the RC402N remote control?
The RC402N wireless remote has an effective range of up to 330 ft (100 m) under typical site conditions, allowing a single operator to adjust grade settings, rotation speed, and power state from the machine or scraper without returning to the instrument.
Is the LL300S-RC48-PRO suitable for outdoor use in bright sunlight?
Yes. While the red beam is most visible in low-light and indoor conditions, the included HR320 digital receiver extends the working range to 2,000 ft in full daylight. The receiver's audible and LED grade indicators let you work accurately outdoors without needing to see the beam itself.
Can the LL300S run on standard AA or D-cell batteries?
The RC48-PRO kit includes a rechargeable NiMH battery pack that delivers up to 70 hours of runtime per charge. The LL300S platform is also compatible with an optional alkaline battery holder for jobsites where recharging isn't convenient — contact us to confirm current adapter availability.
What is the grade range on the LL300S, and how is it set?
The LL300S supports single-axis grade from 0% up to ±25%. Grade is set directly on the instrument's keypad or — in this PRO kit configuration — remotely via the RC402N, which lets you increment grade values without touching the laser head. Two-axis simultaneous grade is not supported on this model; for dual-grade applications, consider the Spectra Precision LL500 series.