Quick Answer
What is the Spectra Precision LL300N?
See also: Spectra Rotary Laser ER1 — Tilt Error Fix
See also: Spectra Rotary Laser ER2 — Battery Low Fix
See also: Spectra Precision LL500 Specs
The Spectra Precision LL300N is a self-leveling horizontal rotary laser designed for general grading, foundations, and suspended ceiling work. It pairs with the HR320 or HR550 receiver and delivers ±10 arc-second accuracy.
Spectra Precision LL300N — Complete Specs, Manual & Guide
Category: Rotary Laser | Brand: Spectra Precision | Model: LL300N
The Spectra Precision LL300N is a rugged, self-leveling single-grade rotary laser laser for construction site layout, grading, and interior leveling. Known for fast self-leveling and IP66 weather resistance, the LL300N is a dependable workhorse for crews in demanding field conditions.
Spectra Precision LL300N Full Specifications
| Accuracy | ±10 arc seconds (±1/16" per 100') |
| Self-leveling range | ±5 degrees |
| Leveling time | Less than 3 seconds |
| Working range | 700m diameter with HR550 receiver |
| Laser class / wavelength | Class 3R / 635nm red |
| Rotation speed | 100, 300, 600 RPM |
| IP rating | IP66 |
| Battery | 4x AA alkaline or rechargeable pack |
| Battery life | ~100 hours AA alkaline at 20°C |
| Operating temperature | -20°C to 50°C |
| Weight | 1.8 kg (4.0 lbs) with batteries |
| Tripod thread | 5/8" standard |
Compatible Receivers
- Spectra HR320 — Factory-matched receiver. 360-degree detection, 320m range.
- Spectra HR550 — Extended-range receiver with digital grade display.
- Topcon LS-80L — Compatible via 635nm wavelength match.
- Leica Rod Eye 160 — Compatible with 635nm red laser.
Accessories & Part Numbers
- HR320 — 360-degree laser receiver, 320m range
- HR550 — Digital grade readout receiver, 550m range
- RC601 — Wireless remote control
- GreenLine 7602 — Replacement battery adapter
- TK-26 — Hard carry case
Error Codes Quick Reference
| ER1 | Tilt out of level range — power off, level tripod, restart |
| ER2 | Battery low — replace or charge batteries |
| ER3 | Temperature out of operating range — allow unit to acclimate |
| ER4 | Leveling motor fault — service required |
Frequently Asked Questions — Spectra Precision LL300N
What is the Spectra Precision LL300N accuracy?
The LL300N is accurate to ±10 arc seconds, equal to ±1/16 inch per 100 feet or ±5mm per 100 meters. This accuracy rating meets the requirements of most construction and grading applications.
How long does the LL300N battery last?
Using 4x AA alkaline batteries, the LL300N delivers approximately 100 hours of runtime at 20°C. An optional rechargeable battery pack is available with similar runtime. AA batteries perform better in cold weather than rechargeable packs.
What receiver works with the Spectra Precision LL300N?
The factory-matched receivers are the Spectra HR320 and HR550. Any 635nm red laser receiver from Topcon (LS-80A, LS-80L) or Leica (Rod Eye 160) is also compatible.
What is the difference between the LL300N and LL500?
The LL500 adds dual-grade capability (X and Y grade simultaneously), a larger working range of 800m, and higher accuracy at ±7 arc seconds. The LL300N is a horizontal-only single-grade laser better suited for basic leveling and layout.
Can the LL300N be used outdoors in rain?
Yes — the LL300N is rated IP66, meaning it is protected against powerful water jets from any direction. It can operate in rain without damage to the instrument.
Related models: Spectra Precision LL500 | Spectra HV301 Dual-Grade Laser
Track your LL300N calibration dates, service history, and field verification records with Gradelog's Equipment Registry. Free to start at gradelog.com.
