The Spectra Precision LL300S-CR72-PRO is a complete, job-ready rotary laser level kit engineered for professional contractors who need single-operator efficiency on grading, site prep, and construction layout projects. This PRO configuration bundles the proven LL300S self-leveling laser with the CR700 machine-control-compatible receiver, a wireless remote control, rechargeable battery system, grade rod, heavy-duty tripod, and protective carrying case — everything required to get on grade faster and with fewer crew members.
Overview & Jobsite Applications
The LL300S is built for the demands of outdoor construction work, delivering a visible and electronically detectable laser plane across jobsites up to 2,600 feet in diameter. Its self-leveling mechanism compensates for out-of-level conditions up to ±5°, and the sealed, IP66-rated housing stands up to dust, rain, and jobsite abuse. The CR700 receiver extends working range and supports machine-mounted applications, while the included remote control lets a single operator manage laser settings — beam alignment, grade mode, and standby cycling — from anywhere on the site without returning to the tripod.
Key Specifications
- Working Range: Up to 2,600 ft (800 m) diameter with CR700 receiver
- Self-Leveling Range: ±5° automatic compensator
- Leveling Accuracy: ±1/16 in at 100 ft (1.5 mm at 30 m)
- Rotation Speed: 150, 300, or 600 RPM selectable
- Grade Capability: Single-axis grade 0–25%
- IP Rating: IP66 dust-tight and water-resistant
- Power: Rechargeable NiMH battery pack; up to 100 hours run time
- Remote Control Range: Up to 200 ft (60 m) wireless operation
- Receiver: CR700 compatible with machine control interfaces
What's in the Kit
- Spectra Precision LL300S rotary laser level
- CR700 laser receiver with magnetic mount and clamp
- Wireless remote control (RC601)
- Rechargeable NiMH battery pack and charger
- Inches/tenths grade rod (CR72 — 7.2 ft / 2.2 m)
- Heavy-duty adjustable tripod
- Hard-shell protective carrying case
- Operator's manual and calibration certificate
Job Applications
Site Grading & Earthwork: The remote control allows the laser operator to stand at a grade stake or reference point and adjust beam elevation on the fly, eliminating round trips to the instrument and dramatically speeding up cut/fill verification cycles on large pads and road subgrade work.
Concrete Flatwork & Slabs: The LL300S's ±1/16 in accuracy at 100 ft gives form setters and concrete finishers a reliable elevation reference for slab-on-grade, tilt-up panels, and elevated decks, with fast rotation speed ensuring no missed receiver shots during screeding.
Drainage & Utility Layout: Single-axis grade capability lets crews set precise positive or negative slopes for storm drain inverts, swales, and utility trenches without re-shooting elevations at every station.
Machine Control & Dozer Grade Control: The CR700 receiver is compatible with aftermarket and OEM machine control systems, enabling semi-automatic blade control on skid steers, motor graders, and dozers for high-production finish grading.
Compatible Accessories
- Spectra Precision CR700 Replacement Receiver
- RC601 Wireless Remote Control
- NiMH Rechargeable Battery Pack & Charger
- Aluminum Grade Rod Extensions
- Universal Machine Control Bracket Mount
- Replacement Hard-Shell Carrying Case
Related Guides
- How to Set Up a Rotary Laser Level for Site Grading
- Single-Axis vs. Dual-Axis Grade Lasers: Which Do You Need?
- Using a Laser Receiver with Machine Control Systems
- LL300S vs. LL500 — Choosing the Right Spectra Laser for Your Crew
Frequently Asked Questions
- Can the LL300S-CR72-PRO be used in outdoor daylight conditions?
- Yes. The LL300S is designed primarily for outdoor use with the CR700 electronic receiver, which detects the laser beam in full daylight at ranges up to 2,600 ft. The visible beam alone is not recommended for long-range outdoor work without the receiver.
- What is the battery life on the rechargeable pack?
- The included NiMH rechargeable battery pack provides up to 100 hours of continuous operation, significantly reducing consumable costs versus alkaline batteries on extended grading projects.
- Does the remote control work through walls or in the cab of a machine?
- The RC601 remote operates at up to 200 ft line-of-sight range. It will not reliably transmit through solid walls, but it functions well from inside an open equipment cab or across open jobsite terrain.
- Is the CR700 receiver compatible with machine control systems from other manufacturers?
- The CR700 features industry-standard analog and digital output interfaces that are compatible with many aftermarket and OEM grade control systems. Consult your machine control dealer to confirm compatibility with your specific system before purchase.
Frequently Asked Questions
Can the LL300S-CR72-PRO be used in outdoor daylight conditions?
Yes. The LL300S is designed primarily for outdoor use with the CR700 electronic receiver, which detects the laser beam in full daylight at ranges up to 2,600 ft. The visible beam alone is not recommended for long-range outdoor work without the receiver.
What is the battery life on the rechargeable pack?
The included NiMH rechargeable battery pack provides up to 100 hours of continuous operation, significantly reducing consumable costs versus alkaline batteries on extended grading projects.
Does the remote control work through walls or in the cab of a machine?
The RC601 remote operates at up to 200 ft line-of-sight range. It will not reliably transmit through solid walls, but it functions well from inside an open equipment cab or across open jobsite terrain.
Is the CR700 receiver compatible with machine control systems from other manufacturers?
The CR700 features industry-standard analog and digital output interfaces that are compatible with many aftermarket and OEM grade control systems. Consult your machine control dealer to confirm compatibility with your specific system before purchase.
