The Spectra Precision LL300S-X21 is a contractor-grade, single-slope rotary laser package engineered for professionals who need a complete, job-ready grading solution straight out of the box. Whether you're running finish grade on a commercial pad, setting slope for drainage, or controlling depth on a trenching job, this package has every piece of equipment you need to get on grade fast and stay there. The LL300S-X21 bundles the rugged LL300S self-leveling rotary laser with the advanced HL760 laser receiver, a 16-foot grade rod graduated in tenths, a heavy-duty aluminum tripod, and a protective carrying case — all from one of the most trusted names in precision measurement.
Built for Real Jobsite Conditions
The Spectra Precision LL300S is a field-proven workhorse used across excavation, site development, concrete flatwork, drainage, and underground utility installation. Its self-leveling mechanism compensates for minor setup inconsistencies automatically, saving setup time and reducing costly grade errors. With a single-axis slope capability of up to 25%, the LL300S is equally at home on dead-flat pads and sloped drainage channels. The unit's out-of-level alarm and automatic shutdown protect your work from errors if the tripod is disturbed mid-operation.
Key Specifications
- Model: Spectra Precision LL300S
- Leveling Method: Automatic self-leveling
- Leveling Range: ±5° automatic compensation
- Single-Axis Slope Range: 0% to 25%
- Working Range: Up to 2,000 ft diameter (with receiver)
- Laser Class: Class IIIa / 3R, 635nm red beam
- Rotation Speed: 150, 300, or 600 RPM selectable
- Accuracy: ±1/16 in at 100 ft
- Battery Life: Up to 110 hours (4x AA batteries)
- IP Rating: IP66 dust and water resistant
- Receiver: Spectra HL760 with remote control
What's in the LL300S-X21 Package
- Spectra Precision LL300S self-leveling rotary laser
- HL760 laser receiver with audible and visual grade indicators
- HL760 remote control for full laser operation from the rod
- 16-foot fiberglass grade rod graduated in tenths of a foot
- Heavy-duty aluminum tripod with adjustable legs
- Protective hard-shell carrying case
- 4x AA batteries and user documentation
Job Applications
Site Grading & Excavation: Establish and maintain cut/fill grades across large earthwork sites. The HL760 receiver's remote capability lets the operator adjust laser elevation without leaving the machine.
Concrete Flatwork & Slabs: Set precise screeding grades for warehouse slabs, parking decks, and residential pours. The ±1/16 in at 100 ft accuracy keeps finished surfaces within spec.
Drainage & Trenching: Apply single-axis slope for storm drain channels, french drains, and utility trenches. The 0–25% slope range covers virtually every drainage pitch required by civil plans.
Pad & Foundation Layout: Control subgrade elevations during building pad construction, ensuring uniform bearing depth across footings and foundation walls.
Compatible Accessories
Frequently Asked Questions
- Does the LL300S-X21 package support dual-axis slope?
- No. The LL300S is a single-axis slope laser, meaning it projects a grade on one axis at a time. For dual-axis slope applications — such as crowned roads or complex drainage pads — consider the Spectra Precision LL500 series. For most site grading, drainage, and flatwork applications, single-axis slope is exactly what's required.
- How far will the HL760 receiver work from the laser?
- The HL760 receiver is rated to detect the LL300S beam at distances up to 2,000 feet in diameter (1,000 ft radius) under typical outdoor conditions. Bright sunlight may reduce effective range, but the LL300S's output power is optimized to maintain reliable reception across large commercial sites.
- Can I operate the LL300S remotely from the grade rod?
- Yes. The HL760 receiver included in the X21 package incorporates a built-in remote control that communicates directly with the LL300S. You can adjust the laser's elevation, toggle rotation speed, and power the unit on or off without returning to the instrument — a major time saver on large grading operations.
- Is the LL300S-X21 package covered by a warranty?
- The Spectra Precision LL300S carries a standard Trimble/Spectra Precision limited warranty. As an authorized dealer, Express Tools ensures your purchase is fully covered. Contact us for warranty registration assistance and service center information if needed.
Frequently Asked Questions
Does the LL300S-X21 package support dual-axis slope?
No. The LL300S is a single-axis slope laser, meaning it projects a grade on one axis at a time. For dual-axis slope applications — such as crowned roads or complex drainage pads — consider the Spectra Precision LL500 series. For most site grading, drainage, and flatwork applications, single-axis slope is exactly what's required.
How far will the HL760 receiver work from the laser?
The HL760 receiver is rated to detect the LL300S beam at distances up to 2,000 feet in diameter (1,000 ft radius) under typical outdoor conditions. Bright sunlight may reduce effective range, but the LL300S's output power is optimized to maintain reliable reception across large commercial sites.
Can I operate the LL300S remotely from the grade rod?
Yes. The HL760 receiver included in the X21 package incorporates a built-in remote control that communicates directly with the LL300S. You can adjust the laser's elevation, toggle rotation speed, and power the unit on or off without returning to the instrument — a major time saver on large grading operations.
Is the LL300S-X21 package covered by a warranty?
The Spectra Precision LL300S carries a standard Trimble/Spectra Precision limited warranty. As an authorized dealer, Express Tools ensures your purchase is fully covered. Contact us for warranty registration assistance and service center information if needed.
