Spectra Precision HV301G-2 Rugged Green Beam Laser System

The Spectra Precision UL633N-1-NR is a professional-grade universal laser system built for contractors who need versatility without compromise. By consolidating horizontal leveling, vertical plumb, and grade projection into a single rotating laser head, the UL633N eliminates the expense and logistics of managing multiple laser platforms across a project. Paired with the HL760 laser receiver, this system delivers reliable performance across foundation, framing, grading, and finish scopes — all in one rugged, field-ready package.

Universal Laser Platform for Every Phase of the Job

General contractors, grading crews, and framing teams operate across wildly different conditions and layout demands. The UL633N answers that challenge with switchable operating modes — horizontal level, vertical plumb, and dual-axis grade — controlled directly from the instrument without swapping optical components. Whether you're setting drainage slopes, plumbing walls, or establishing a level reference across a concrete slab, the UL633N transitions between tasks in the field with no downtime. The included HL760 receiver extends the working range and improves usability in bright outdoor conditions where the naked eye can't track the beam.

Key Specifications

• Model: UL633N-1-NR (includes HL760 receiver, no remote)
• Operating Modes: Horizontal, Vertical, Grade (single and dual axis)
• Self-Leveling Range: ±5°
• Grade Range: ±10% in grade mode
• Accuracy: ±1/16 in. at 100 ft (±1.5 mm at 30 m)
• Working Range (with receiver): Up to 2,000 ft diameter
• Rotation Speed: Selectable — 100, 300, 600 RPM
• Laser Class: Class IIIa / Class 3R
• IP Rating: IP66 — dust-tight and protected against heavy spray
• Battery Life: Up to 40 hours (alkaline batteries)
• Receiver Included: HL760 laser receiver

Key Features

• Single-head design supports plumb, level, and grade — no optical head swaps
• Dual-axis grade capability for complex slope applications
• Selectable rotation speeds adapt to detector-only or visual use cases
• Electronic self-leveling with out-of-level warning alarm
• IP66-rated housing withstands dust, rain, and jobsite washdown
• Compatible with Spectra Precision RC601 remote control (sold separately)
• HL760 receiver features numeric display and audible/visual grade indicators
• Compact, balanced form factor mounts to standard 5/8-11 tripods

Job Applications

Site Grading & Drainage: Set single or dual-axis grades for parking lots, athletic fields, retention ponds, and roadbed subgrade. The UL633N's ±10% grade range and 2,000 ft working diameter cover large civil and commercial grading projects without repositioning.

Foundation & Flatwork: Establish a true horizontal reference plane for footing forms, slab elevation control, and concrete screeding. The self-leveling system and HL760 receiver give formwork crews consistent, verifiable elevation across large pours.

Structural Framing: Switch to vertical plumb mode to align stud walls, column lines, and curtain wall panels. The UL633N replaces a dedicated plumb laser for multi-story framing applications without adding another instrument to the truck.

Interior Finish & MEP Layout: Use horizontal mode at slow rotation for suspended ceiling grids, drop ceilings, and finish floor elevation control. Contractors handling ceiling, mechanical, and finish scopes get a single instrument that works across every trade handoff.

Compatible Accessories

• Spectra Precision RC601 Remote Control — wireless grade and mode control from the machine or grade rod
• Spectra Precision HL760 Laser Receiver — replacement or second receiver for two-person grading crews
• Spectra Precision GR1 Grade Rod — graduated rod optimized for HL760 receiver mounting
• Heavy-Duty Tripod (5/8-11 thread) — stable platform for rotating laser instruments
• Spectra Precision Laser Carrying Case — padded transport and storage solution

Related Guides

• How to Set Grade with a Rotating Laser — Step-by-Step Field Guide
• Rotating Laser vs. Line Laser: Choosing the Right Tool for Your Scope
• Using a Laser Receiver Outdoors: Tips for Maximum Range and Accuracy
• Spectra Precision UL633N vs. LL500 — Which Universal Laser is Right for You?

Frequently Asked Questions

Does the UL633N require a remote control to set grade?

No. Grade values can be set directly from the instrument's onboard controls. The optional RC601 remote control adds convenience for operators working solo or adjusting grade remotely from a machine cab, but it is not required for grade functionality.

What is the difference between the UL633N-1-NR and other UL633N configurations?

The "NR" suffix indicates this package does not include the RC601 remote control. It ships with the HL760 receiver and the instrument itself. If remote operation is needed, the RC601 is available separately or as part of a different bundle configuration.

Can the UL633N be used indoors for ceiling layout and finish work?

Yes. The UL633N operates effectively indoors in horizontal mode. For interior finish applications, select a slower rotation speed so the beam is visible without the receiver. The HL760 receiver is recommended for longer indoor ranges or in situations where beam visibility is limited by ambient light.

Is the UL633N compatible with machine control or GPS grade systems?

The UL633N is a standalone optical laser system and is not designed for direct integration with GPS or machine control platforms. It is optimized for conventional grade rod and receiver workflows on civil, commercial, and residential construction sites.