The Topcon RL-HV2S DB Kit delivers professional dual-slope laser performance in a field-ready package built for contractors who demand accuracy, durability, and universal battery compatibility on every job. Combining the proven RL-HV2S rotary laser with the lightweight LS-80X machine-mount receiver and standard alkaline battery operation, this kit eliminates the overhead of proprietary battery systems and keeps large crews moving without interruption. Whether you're grading a commercial parking lot, installing utility mains, or fine-grading a subdivision pad, the RL-HV2S DB gives you the independent dual-axis slope control to get the work done right the first time.
Overview & Jobsite Applications
The RL-HV2S operates across a full 360° rotary plane and supports two fully independent grade axes simultaneously, making it one of the most versatile dual-grade lasers in its class. With a self-leveling range of ±5° and slope capability of 0–10% on both X and Y axes, this instrument handles everything from flat slabs to complex drainage transitions. The IP66-rated housing resists dust and direct water jets, keeping the unit operational in demanding outdoor environments. The included LS-80X receiver pairs cleanly with grade rods, machine masts, and screed rails, so your crews can adapt the setup to the task without swapping hardware.
Key Specifications
- Laser Class: Class IIIa (Class 3R), 635 nm visible red beam
- Self-Leveling Range: ±5° automatic
- Grade Range (X & Y): 0–10% independent dual slope
- Grade Accuracy: ±1 arc minute (±0.029%) at calibration
- Working Radius: Up to 800 m (2,600 ft) diameter with receiver
- Rotation Speed: 300 / 600 / 1000 RPM selectable
- Battery Type: Alkaline D-cell (included) — no proprietary packs required
- Battery Life: Approximately 100 hours at standard rotation speed
- IP Rating: IP66 dust and water resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Receiver: Topcon LS-80X with 80 mm acceptance window
What's in the DB Kit
- Topcon RL-HV2S dual-grade rotary laser
- Topcon LS-80X machine-mount / grade rod receiver
- Alkaline D-cell batteries (pre-installed)
- Carry case for secure transport and storage
- Laser target card
- Operator's manual and calibration documentation
Job Applications
Parking Lot & Site Grading: Set independent X and Y slopes to establish positive drainage across large paved surfaces without repositioning the instrument. The 800 m working diameter means one setup covers most commercial lots end to end.
Utility Trenching & Force Mains: Dial in a consistent pipe-fall grade on the Y axis while keeping the X axis level, then use the LS-80X on a grade rod to verify invert elevations at each joint — no string line required.
Concrete Flatwork & Slabs: Attach the LS-80X to a screed rail mast and run continuous elevation control across residential or commercial slabs. Selectable rotation speed lets you match receiver response to your screed pace.
Subdivision Pad Preparation: Use dual-slope mode to cut and fill building pads to finished grade on both axes simultaneously, reducing machine passes and GPS dependency on smaller earthwork scopes.
Compatible Accessories
- Topcon LS-80L Larger Acceptance Window Receiver
- Topcon RC-40 Wireless Remote Control
- Universal Laser Detector Grade Rod Clamp
- Topcon Aluminum Tripod with Quick-Release Head
- Replacement Alkaline D-Cell Battery Pack (8-count)
- Protective Laser Hard Carry Case
Related Guides
- How to Set Dual Grade with the Topcon RL-HV2S — Step-by-Step
- Rotary Laser Receiver Comparison: LS-80X vs. LS-80L
- Alkaline vs. Rechargeable Laser Batteries: What Contractors Need to Know
- Best Rotary Lasers for Grading & Sitework in 2025
Frequently Asked Questions
- Can the RL-HV2S set grade on both axes at the same time?
- Yes. The RL-HV2S supports fully independent dual-slope control on both X and Y axes simultaneously, ranging from 0–10% on each. You can set a cross-slope on one axis and a fall grade on the other without any manual tilt adapters or secondary instruments.
- What is the difference between the DB kit and other RL-HV2S configurations?
- The DB (Dry Battery) designation indicates this kit ships with the LS-80X receiver and standard alkaline D-cell batteries rather than a proprietary rechargeable pack. This makes the unit compatible with any hardware store batteries worldwide, which is preferred by crews working in remote locations or managing large fleets where universal battery sourcing is important.
- How far will the LS-80X receiver detect the laser signal?
- The LS-80X is rated for use up to 400 m (1,300 ft) from the instrument — 800 m total working diameter — under normal outdoor conditions. Detection range may be reduced in bright direct sunlight; increasing rotation speed to 1000 RPM can improve outdoor visibility.
- Is the Topcon RL-HV2S compatible with machine control systems?
- The RL-HV2S outputs a standard rotating laser plane that works with most aftermarket and OEM laser-based grade control systems when paired with a compatible mast-mounted receiver. For fully integrated machine control with automatic blade response, consult Express Tools about Topcon's dedicated machine control laser solutions.
Frequently Asked Questions
Can the RL-HV2S set grade on both axes at the same time?
Yes. The RL-HV2S supports fully independent dual-slope control on both X and Y axes simultaneously, ranging from 0–10% on each. You can set a cross-slope on one axis and a fall grade on the other without any manual tilt adapters or secondary instruments.
What is the difference between the DB kit and other RL-HV2S configurations?
The DB (Dry Battery) designation indicates this kit ships with the LS-80X receiver and standard alkaline D-cell batteries rather than a proprietary rechargeable pack. This makes the unit compatible with any hardware store batteries worldwide, which is preferred by crews working in remote locations or managing large fleets where universal battery sourcing is important.
How far will the LS-80X receiver detect the laser signal?
The LS-80X is rated for use up to 400 m (1,300 ft) from the instrument — 800 m total working diameter — under normal outdoor conditions. Detection range may be reduced in bright direct sunlight; increasing rotation speed to 1000 RPM can improve outdoor visibility.
Is the Topcon RL-HV2S compatible with machine control systems?
The RL-HV2S outputs a standard rotating laser plane that works with most aftermarket and OEM laser-based grade control systems when paired with a compatible mast-mounted receiver. For fully integrated machine control with automatic blade response, consult Express Tools about Topcon's dedicated machine control laser solutions.
