The Spectra Precision LL300N-X11 PROMAX is a complete, field-ready laser kit assembled for finish-grade contractors who demand tenth-foot accuracy without sacrificing jobsite flexibility. By combining the LL300N dual-slope laser with a full-featured remote control, a deluxe grade receiver, a tenths rod, and rechargeable batteries, this kit eliminates the compromises that slow down high-precision drainage, utility, and site-finish operations.
Kit Overview & Jobsite Applications
The PROMAX configuration is purpose-built for contractors who regularly tackle complex grading assignments — finish pads, parking lot drainage planes, athletic fields, and multi-run utility trenches where grade tolerances are measured in tenths rather than hundredths of a foot. The remote-slope capability lets a single operator set, verify, and adjust grade from the rod position, eliminating the round-trips to the instrument that slow down small crews. Rechargeable batteries keep operational costs predictable on extended site campaigns, and the tenths rod pairs directly with the deluxe receiver for fast, readable cuts at finish-grade tolerances.
Key Specifications
- Slope Range: ±10% on both X and Y axes simultaneously
- Accuracy: ±1.5 arc seconds (±0.9mm/10m)
- Self-Leveling Range: ±5° automatic compensation
- Operating Range: Up to 2,000 ft diameter with included receiver
- Rotation Speed: 100, 300, or 600 RPM selectable
- Battery Life: Up to 100 hours per charge (rechargeable NiMH pack)
- IP Rating: Sealed against dust and moisture for outdoor use
- Remote Frequency: 418 MHz encrypted signal
What's in the PROMAX Kit
- Spectra Precision LL300N Laser: Dual-axis remote slope transmitter with sealed housing
- HL760 Deluxe Receiver: Large display, audible and visual grade indication, tenths-compatible readout
- RC601 Remote Control: Full slope set, fine adjustment, power, and rotation speed from the rod
- Tenths Rod: Graduated in 0.1 ft increments for finish-grade rod work
- Rechargeable Battery Pack & Charging Dock: Field-proven NiMH system with AC/DC charging capability
- Padded Carrying Case: Organized storage for all kit components
- Mounting Hardware & Manual
Job Applications
Finish Pad Grading: Set dual cross-slopes remotely and read tenths cuts directly on the grade rod — no laser repositioning between layout and finish passes.
Parking Lot & Hardscape Drainage: Establish precise 1–2% cross-fall planes across large paved areas with real-time remote adjustment as conditions change.
Athletic Field Construction: Crown and sideline slopes on sports turf demand tenth-foot repeatability across wide areas — exactly what the LL300N and tenths rod deliver.
Utility Trench Slope Control: Set and hold pipe-fall grades on storm drain and sewer runs; remote slope adjustment lets one operator manage grade corrections without leaving the trench.
Compatible Accessories
- Spectra Precision HL760 Replacement Receiver
- RC601 Remote Control (Replacement)
- Rechargeable Battery Pack for LL300 Series
- Heavy-Duty Tripod for Laser Levels
- Aluminum Grade Rod — Tenths Graduation
- Spectra LL300N Carrying Case (Replacement)
Related Guides
- How to Set Dual Slope with the Spectra LL300N
- Choosing the Right Laser Kit for Finish Grading
- Remote Slope Lasers vs. Manual Slope Lasers: Which Do You Need?
- Maintaining Rechargeable Batteries on Your Laser Level
Frequently Asked Questions
- Can the LL300N-X11 PROMAX set two different slopes at the same time?
- Yes. The LL300N supports simultaneous dual-axis slope — you can set independent X and Y grades up to ±10% on each axis concurrently, and both can be adjusted remotely via the RC601 without touching the instrument.
- What is the advantage of the tenths rod over a standard grade rod?
- A tenths rod is graduated in 0.1 ft increments, which aligns with the tolerances required for finish grading, paving, and athletic field work. It allows the rod person to read and call grade cuts without mental conversion, reducing errors on tight-tolerance applications.
- How long do the rechargeable batteries last in the field?
- The NiMH rechargeable pack included with the PROMAX kit is rated for up to 100 hours of runtime per charge under normal operating conditions. The included charging dock supports both AC and DC input, so you can recharge from a truck outlet between shifts.
- Is the LL300N-X11 PROMAX covered by a warranty?
- Spectra Precision backs the LL300N with a 3-year instrument warranty and a 1-year warranty on accessories. As an authorized Spectra Precision dealer, Express Tools supports the full manufacturer warranty process on all kits sold through our store.
Frequently Asked Questions
Can the LL300N-X11 PROMAX set two different slopes at the same time?
Yes. The LL300N supports simultaneous dual-axis slope — you can set independent X and Y grades up to ±10% on each axis concurrently, and both can be adjusted remotely via the RC601 without touching the instrument.
What is the advantage of the tenths rod over a standard grade rod?
A tenths rod is graduated in 0.1 ft increments, which aligns with the tolerances required for finish grading, paving, and athletic field work. It allows the rod person to read and call grade cuts without mental conversion, reducing errors on tight-tolerance applications.
How long do the rechargeable batteries last in the field?
The NiMH rechargeable pack included with the PROMAX kit is rated for up to 100 hours of runtime per charge under normal operating conditions. The included charging dock supports both AC and DC input, so you can recharge from a truck outlet between shifts.
Is the LL300N-X11 PROMAX covered by a warranty?
Spectra Precision backs the LL300N with a 3-year instrument warranty and a 1-year warranty on accessories. As an authorized Spectra Precision dealer, Express Tools supports the full manufacturer warranty process on all kits sold through our store.
