The Topcon RL-SV1S is a professional-grade, self-leveling single-slope rotary laser built for contractors who need reliable horizontal and grade reference across demanding jobsites. Delivering ±0.04 in/30ft accuracy and a full 360° laser plane, this unit eliminates the manual setup guesswork that slows crews down. Whether you're cutting grades on a road base, managing elevation on a large excavation, or setting drainage slopes on a commercial pad, the RL-SV1S provides the consistent reference your team needs to stay on schedule.
Jobsite Overview
Designed for crews working in grading, excavation, site preparation, and general construction leveling, the RL-SV1S handles the conditions found on active jobsites — vibration, dust, and variable terrain included. Its automatic self-leveling mechanism compensates for minor tripod settlement or ground shift, so operators spend less time re-checking and more time working. The included LS-80X receiver extends working range and allows crews to work at distances where the laser beam is not visible to the naked eye, making it equally effective on large open sites and confined utility trenches.
Key Specifications
- Accuracy: ±0.04 in/30ft (±1mm/10m)
- Leveling Range: ±5° automatic self-leveling
- Slope Range: 0% to ±10% single slope
- Laser Class: Class 3R, 635nm visible red beam
- Rotation Speed: 300, 600, or 1200 RPM selectable
- Working Range: Up to 2,600 ft diameter with LS-80X receiver
- Battery Life: Up to 100 hours (4 x D-cell alkaline)
- IP Rating: IP66 dust and water resistant
- Weight: 5.5 lbs (2.5 kg)
What's in the Kit
- Topcon RL-SV1S Single-Slope Rotary Laser
- LS-80X Laser Receiver with clamp
- RC-40 Remote Control
- Carrying case
- 4 x D-cell alkaline batteries
- Operator's manual
Job Applications
Site Grading & Earthwork: Set consistent slope references for motor grader and dozer operators working large cuts and fills. The single-slope function lets you dial in a specific grade percentage and hold it across the full 360° plane, keeping machine operators locked in without constant re-staking.
Drainage & Utility Trenching: Establish precise fall lines for storm drain, sanitary sewer, and utility trench work where minimum grade tolerances are critical to system performance and code compliance.
Concrete Flatwork & Floor Leveling: Use the horizontal level plane to control screeding elevation on slabs, tilt-up panels, and floor pours, reducing high spots and material waste on large pours.
Foundation & Footing Layout: Verify and transfer elevation benchmarks across foundation forms quickly. The long battery life keeps the laser running through full pours without swapping cells mid-job.
Compatible Accessories
- Topcon LS-80X Laser Receiver (Replacement)
- Topcon RC-40 Remote Control
- Topcon RD-18 Universal Detector Holder / Rod Clamp
- Heavy-Duty Laser Tripod for Rotary Lasers
- Topcon Carrying & Storage Case
Related Guides
- How to Set Slope Grade with a Single-Slope Rotary Laser
- Rotary Laser vs. Pipe Laser: Choosing the Right Tool for Excavation
- Setting Up the Topcon LS-80X Receiver for Maximum Range
- Rotary Laser Maintenance Tips for Jobsite Longevity
Frequently Asked Questions
- Can the Topcon RL-SV1S project a dual-slope grade?
- No — the RL-SV1S is a single-slope unit, meaning it can set grade in one axis at a time. If your application requires simultaneous X and Y slope control, consider the Topcon RL-SV2S, which supports dual-slope operation. For most grading and drainage applications, single slope is sufficient.
- What is the maximum working range with the LS-80X receiver?
- When paired with the included LS-80X receiver, the RL-SV1S has a working diameter of up to 2,600 feet (approximately 800 meters), making it well-suited for large open excavation sites, airfield grading, and expansive parking lot layouts.
- Is the RL-SV1S protected against rain and jobsite dust?
- Yes. The RL-SV1S carries an IP66 ingress protection rating, which means it is fully protected against dust intrusion and resistant to heavy water jets from any direction. It is built to stay operational through rain and dusty site conditions without requiring covers or shelters.
- Does the RC-40 remote control work at full working range?
- The RC-40 remote has an effective range of approximately 200 feet (60 meters), which covers most practical operating distances for grade control. It allows operators to adjust rotation speed, turn the unit on/off, and switch modes without returning to the instrument — useful when the laser is mounted on a grade rod or elevated tripod.
Frequently Asked Questions
Can the Topcon RL-SV1S project a dual-slope grade?
No — the RL-SV1S is a single-slope unit, meaning it can set grade in one axis at a time. If your application requires simultaneous X and Y slope control, consider the Topcon RL-SV2S, which supports dual-slope operation. For most grading and drainage applications, single slope is sufficient.
What is the maximum working range with the LS-80X receiver?
When paired with the included LS-80X receiver, the RL-SV1S has a working diameter of up to 2,600 feet (approximately 800 meters), making it well-suited for large open excavation sites, airfield grading, and expansive parking lot layouts.
Is the RL-SV1S protected against rain and jobsite dust?
Yes. The RL-SV1S carries an IP66 ingress protection rating, which means it is fully protected against dust intrusion and resistant to heavy water jets from any direction. It is built to stay operational through rain and dusty site conditions without requiring covers or shelters.
Does the RC-40 remote control work at full working range?
The RC-40 remote has an effective range of approximately 200 feet (60 meters), which covers most practical operating distances for grade control. It allows operators to adjust rotation speed, turn the unit on/off, and switch modes without returning to the instrument — useful when the laser is mounted on a grade rod or elevated tripod.
