The Spectra Precision LL300S-CR71-PRO is a professional-grade rotating laser level kit engineered for survey firms, precision grading specialists, and single-operator crews who need reliable elevation control across demanding jobsite conditions. Combining the proven LL300S self-leveling laser with the CR700 machine-control-compatible receiver, a 5-button remote control, rechargeable battery system, tenths-graduated rod, and heavy-duty tripod, this kit delivers everything needed to establish and maintain grade reference from the first setup to final inspection — without a second crew member on site.
Overview & Jobsite Applications
The LL300S-CR71-PRO is purpose-built for professionals who operate in survey-standard tenths notation and require the flexibility to reposition the laser head remotely from up to 200 feet away. Whether you are setting finish-grade elevations on a large commercial pad, running drainage profiles across agricultural land, or establishing benchmark elevations on a utility corridor, this kit eliminates the back-and-forth communication delays that slow single-person crews. The rechargeable power system reduces alkaline battery consumption and disposal overhead on multi-day projects, making it a practical choice for environmentally conscious contractors and firms managing project compliance documentation.
Key Specifications
- Model: Spectra Precision LL300S-CR71-PRO
- Self-Leveling Range: ±6° automatic self-leveling
- Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
- Operating Range: Up to 2,000 ft diameter (610 m) with CR700 receiver
- Rotation Speed: 100, 300, or 600 RPM selectable
- Remote Control Range: Up to 200 ft (60 m)
- Power: Rechargeable NiMH battery pack included; alkaline AA backup compatible
- Battery Life: Up to 100 hours on rechargeable pack
- IP Rating: IP66 dust and water resistant
- Receiver: CR700 compatible with machine control and conventional rod work
- Rod Graduation: Tenths (0.1 ft) for survey-standard notation
What's in the Kit
- Spectra Precision LL300S Self-Leveling Rotating Laser
- CR700 Laser Receiver with rod clamp
- 5-Button RC703 Remote Control
- Rechargeable NiMH battery pack and AC wall charger
- Tenths-graduated grade rod (survey-standard 0.1 ft increments)
- Heavy-duty adjustable tripod
- Protective carrying and storage case
- Operator manual and quick-start guide
Job Applications
Commercial Site Grading: Set a consistent elevation plane across large commercial pads and parking lots. The remote control lets a single operator adjust the laser elevation reference from the rod location without returning to the instrument, dramatically cutting layout time on pads exceeding an acre.
Agricultural Land Leveling: Run precise drainage profiles and field leveling passes with tenths-based elevation notation that matches survey deliverables and NRCS documentation standards. The 2,000 ft operating diameter covers full field widths in a single setup.
Utility & Pipeline Grade Control: Establish invert elevations and percent-grade references along utility corridors and drainage pipe runs. Tenths rod compatibility ensures readings align directly with engineer-of-record plan sets and as-built documentation.
Foundation & Flatwork Layout: Transfer benchmark elevations to batter boards, footing forms, and slab pour stops with the accuracy and repeatability that survey-standard contractors and inspectors expect on permitted projects.
Compatible Accessories
- Spectra Precision CR600 Receiver — Budget-grade rod work receiver
- Spectra Precision RC703 Replacement Remote Control
- Replacement NiMH Rechargeable Battery Pack for LL300S
- Spectra Precision Grade Rod Extensions — Tenths Graduated
- Heavy-Duty Laser Tripod with Quick-Release Head
- Spectra Precision LL300S Replacement Carrying Case
Frequently Asked Questions
- Can the LL300S-CR71-PRO be used outdoors in rain or dusty conditions?
- Yes. The LL300S carries an IP66 rating, meaning it is fully protected against dust ingress and resistant to heavy water jets from any direction. It is designed for continuous outdoor use on active construction and grading sites.
- Does the remote control work through walls or around equipment?
- The RC703 remote control uses infrared transmission and requires a clear line of sight to the laser head. It operates reliably at distances up to 200 ft in open conditions. Obstructions such as equipment, vehicles, or terrain features between the remote and the laser will reduce effective range.
- Is the rechargeable battery the only power option?
- No. The LL300S-CR71-PRO ships with a rechargeable NiMH pack as the primary power source, but the instrument also accepts standard AA alkaline batteries as a backup. This dual-power compatibility ensures you are never stranded on site due to a depleted rechargeable pack.
- Is this kit compatible with machine control grade indicators or only conventional rod work?
- The included CR700 receiver is compatible with both conventional grade rod work and machine control mounting brackets. It can be mounted directly to motor grader or dozer blade masts for automated blade control applications, in addition to standard hand-level and layout tasks.
