Topcon RL-HV2S Self-Leveling Dual Grade Laser DB Kit with LS-80X Receiver, Inches Rod and Tripod / Alkaline

The Topcon RL-HV2S Dual Grade Laser Kit (Model 1051612-21-K2) is a complete, field-ready package engineered for contractors who demand precision dual-slope control without the constraints of a charging schedule. Running on standard D-cell alkaline batteries, this kit lets you swap fresh power in seconds anywhere on site — no generator, no charger, no downtime. Whether you're grading a parking lot, sloping a drainage channel, or setting footings across a sprawling commercial site, the RL-HV2S delivers the dual grade accuracy and long-range performance professionals rely on.

Overview & Jobsite Applications

The RL-HV2S is Topcon's workhorse dual grade rotary laser, capable of simultaneously setting independent slopes on both the X and Y axes. This alkaline-powered configuration (1051612-21-K2) is purpose-built for crews working across multiple dispersed job sites, remote locations without reliable power, or any situation where managing rechargeable batteries creates logistical headaches. The included LS-80X machine control and hand-held receiver, inches-graduated grade rod, and heavy-duty tripod make this a true drive-it-to-the-job, set-it-up, and work package.

Key Specifications

• Model: Topcon RL-HV2S (Part No. 1051612-21-K2)
• Grade Range (X-Axis): ±10%
• Grade Range (Y-Axis): ±10%
• Accuracy: ±1/16 in at 100 ft (±1.5 mm at 30 m)
• Working Range (diameter): Up to 2,600 ft (800 m) with LS-80X receiver
• Self-Leveling Range: ±5°
• Rotation Speed: 300 / 600 / 1200 RPM selectable
• Power Source: D-cell alkaline batteries (no rechargeable pack required)
• Battery Life: Approx. 100+ hours (alkaline D-cells)
• IP Rating: IP66 — dust-tight and water jet resistant
• Receiver: Topcon LS-80X (hand-held and machine-mount compatible)
• Operating Temperature: -4°F to +131°F (-20°C to +55°C)

What's in the Kit

• Topcon RL-HV2S dual grade rotary laser transmitter
• Topcon LS-80X laser receiver with mounting bracket and clamp
• Inches-graduated grade rod (fiberglass)
• Heavy-duty aluminum field tripod
• Alkaline D-cell batteries (pre-installed set)
• Carrying case for laser unit
• Operator's manual and calibration certificate

Job Applications

Site Grading & Earthwork: Set simultaneous X and Y slopes across large cut-and-fill areas, ensuring drainage grades are met in a single laser setup without repositioning.

Parking Lot & Flatwork: Establish precise two-directional pitches for concrete and asphalt flatwork so stormwater drains correctly to inlets — critical for ADA compliance and pavement longevity.

Agricultural & Irrigation Grading: Program field slopes for laser land leveling, drainage tile installation, and irrigation channel grading across large acreage where power outlets are unavailable.

Foundation & Footing Layout: Use single-axis mode to quickly transfer elevations and verify footing benchmarks across a commercial or residential foundation without a second crew member on the rod.

Compatible Accessories

• Topcon LS-80L Machine Control Receiver — extended detection for dozer and motor grader blades
• Topcon RC-400 Remote Control — adjust grade settings from anywhere on site
• Topcon Wall Mount Bracket — secure interior mounting for slab and tilt-up work
• Alkaline D-Cell Battery Multi-Pack — keep spare batteries on every truck
• Topcon Laser Hard Case — upgraded foam-lined transport protection

Related Guides

• How to Set Dual Grade with the Topcon RL-HV2S — Step-by-Step
• Alkaline vs. Rechargeable Laser Levels: Which Is Right for Your Crew?
• Understanding Laser Receiver Range and Accuracy for Grading
• Topcon RL-HV2S vs. RL-H5A: Choosing the Right Rotary Laser

Frequently Asked Questions

Why choose the alkaline battery version over the rechargeable RL-HV2S?

The alkaline model (1051612-21-K2) is ideal when you operate across multiple remote sites, cannot guarantee access to a charging outlet overnight, or simply want the ability to pop in fresh D-cells and keep working instantly. Battery life exceeds 100 hours under normal use, so most jobs won't require a mid-project swap at all.

Can the LS-80X receiver in this kit be used with machine control grade systems?

Yes. The Topcon LS-80X is compatible with both hand-held grade rod work and machine-mount applications. It can be bracket-mounted to a dozer or motor grader blade mast, making it a versatile receiver for mixed hand-grade and machine-grade crews on the same site.

What is the maximum working range of this laser kit?

With the included LS-80X receiver, the RL-HV2S has a working diameter of up to 2,600 feet (800 meters) in good conditions, making it more than adequate for large commercial grading, subdivision earthwork, and agricultural leveling projects.

Does the RL-HV2S self-level automatically, and what happens if it's bumped on site?

Yes — the RL-HV2S features automatic self-leveling within a ±5° range. If the instrument is disturbed beyond that range, it stops rotating and emits an out-of-level alarm, preventing crews from working off an incorrect grade without knowing it. Simply re-level the tripod and the laser will resume normal operation.