The Spectra Precision LL300N-PRO is a complete professional rotary laser kit engineered for contractors who need reliable, accurate grade control on demanding job sites. Combining the LL300N-2 self-leveling rotary laser, HL450 digital receiver, RC601 remote control, and a rechargeable battery system, this kit delivers everything a site crew needs to hit grade fast and stay productive all day. Whether you're grading a pad, forming footings, or setting drainage slopes, the LL300N-PRO gives you the tools to work with confidence from the first setup to the last shot.
Professional Rotary Laser for Site Prep, Excavation & Concrete Work
The LL300N-PRO is built around the LL300N-2 laser, a self-leveling single-slope rotary instrument trusted by foundation contractors, grading crews, and concrete finishers across North America. The laser self-levels within ±5° and holds a horizontal accuracy of ±1/16" at 100 feet—tight enough for slab work, tight enough for drainage. The HL450 digital receiver extends working range up to 2,600 feet in diameter, giving large-site crews the coverage they need without repositioning the instrument. The RC601 remote lets a single operator control spin speed, grade mode, and power from up to 200 feet away, cutting out wasted trips back to the instrument.
Key Specifications
- Model: LL300N-2 Self-Leveling Rotary Laser
- Accuracy: ±1/16" at 100 ft (1.5mm at 30m)
- Self-Leveling Range: ±5°
- Working Range: Up to 2,600 ft diameter with HL450 receiver
- Rotation Speed: 100, 300, or 600 RPM selectable
- Single-Axis Grade Range: ±25%
- IP Rating: IP66 dust and water resistant
- Battery Life: Up to 100 hours with rechargeable NiMH pack
- Remote Control Range: RC601 up to 200 ft
- Laser Class: Class 3R, 635nm visible red beam
What's in the Kit
- LL300N-2 Self-Leveling Rotary Laser — single-axis grade capability, IP66 rated
- HL450 Digital Grade Rod Receiver — audio and visual grade indication, adjustable sensitivity
- RC601 Remote Control — full instrument control up to 200 ft away
- Rechargeable NiMH Battery Pack — up to 100 hours of runtime per charge
- Battery Charger — 110V AC wall charger included
- Alkaline Battery Adapter — backup power option for remote sites
- Carry Case — hard-shell protective case for transport and storage
- Rod Clamp — for mounting HL450 to grade rod or story pole
Job Applications
Site Grading & Earthwork: The 2,600 ft working diameter and RC601 remote make the LL300N-PRO ideal for operators running heavy equipment. Set grade, dial in slope, and let the machine operator follow the receiver without a grade checker in the cut.
Concrete Flatwork & Slabs: The ±1/16" accuracy and selectable rotation speeds keep pour crews and screed operators on target. Set up once, work the entire slab without repositioning.
Foundation Layout & Footings: Use the single-axis grade function to transfer elevation around a foundation perimeter or set footing depths consistently across multiple pads on the same project.
Drainage & Utility Trenching: Dial in precise single-axis slope grades for storm drain, sanitary sewer, and irrigation trench work where consistent fall is critical to system performance.
Compatible Accessories
- Spectra Precision HL450 Replacement Receiver
- RC601 Replacement Remote Control
- Spectra Precision FR600 Universal Laserometer Rod
- Heavy-Duty Tripod for Rotary Lasers
- Spectra Precision NiMH Rechargeable Battery Pack
- Rotating Laser Wall Mount Bracket
Related Guides
- How to Set Single-Axis Grade with the LL300N-2
- Rotary Laser vs. Pipe Laser: Which Do You Need?
- How to Use a Laser Receiver on a Grade Rod
- Spectra Precision LL300N-PRO vs. LL300N-1: What's the Difference?
Frequently Asked Questions
- Does the LL300N-PRO work in outdoor daylight conditions?
- Yes. While the visible red beam is not easily seen by the naked eye in bright sunlight, the HL450 digital receiver picks up the laser signal reliably at distances up to 2,600 feet in full daylight, making it fully capable for outdoor site work in any lighting condition.
- Can the LL300N-2 be used for vertical plumb applications?
- The LL300N-2 is primarily designed for horizontal leveling and single-axis grade work. It is not optimized for vertical plumb layout. For vertical plane work, a separate pipe laser or dual-axis laser would be the appropriate tool.
- What is the difference between the LL300N-PRO and the LL300N-1 kit?
- The LL300N-PRO includes the RC601 remote control and rechargeable battery system in addition to the HL450 receiver, making it the more complete package for solo operators and production crews. The LL300N-1 is a more basic kit without the remote or rechargeable batteries.
- Is the LL300N-2 covered under warranty?
- Spectra Precision backs the LL300N-2 with a 3-year manufacturer warranty covering defects in materials and workmanship. Express Tools is an authorized dealer, so all warranty service is handled through official Spectra Precision service channels.
Frequently Asked Questions
Does the LL300N-PRO work in outdoor daylight conditions?
Yes. While the visible red beam is not easily seen by the naked eye in bright sunlight, the HL450 digital receiver picks up the laser signal reliably at distances up to 2,600 feet in full daylight, making it fully capable for outdoor site work in any lighting condition.
Can the LL300N-2 be used for vertical plumb applications?
The LL300N-2 is primarily designed for horizontal leveling and single-axis grade work. It is not optimized for vertical plumb layout. For vertical plane work, a separate pipe laser or dual-axis laser would be the appropriate tool.
What is the difference between the LL300N-PRO and the LL300N-1 kit?
The LL300N-PRO includes the RC601 remote control and rechargeable battery system in addition to the HL450 receiver, making it the more complete package for solo operators and production crews. The LL300N-1 is a more basic kit without the remote or rechargeable batteries.
Is the LL300N-2 covered under warranty?
Spectra Precision backs the LL300N-2 with a 3-year manufacturer warranty covering defects in materials and workmanship. Express Tools is an authorized dealer, so all warranty service is handled through official Spectra Precision service channels.
