The Topcon RL-H5A (SKU: 1021200-17) is a professional-grade single-slope rotary laser engineered for foundation contractors, concrete flatwork crews, and site preparation teams who demand fast, accurate horizontal leveling across demanding jobsite conditions. This complete kit pairs the RL-H5A laser head with Topcon's LS-100D digital receiver and runs entirely on standard AA alkaline batteries—eliminating the hassle of proprietary chargers and battery packs when you're running multiple crews across multiple sites.
Rotary Laser Built for Real Construction Workflows
The RL-H5A is designed to sit on a tripod and go to work. Its automatic self-leveling system compensates within ±10 arc minutes and locks in a reference plane in seconds. With a working radius of up to 2,600 feet using the LS-100D receiver, this laser covers large commercial pours, residential foundations, utility grading, and parking lot layout without repositioning. IP66-rated dust and water resistance means it handles dirt, concrete splatter, and unexpected weather without complaint.
Key Specifications
- Model: Topcon RL-H5A | Part No. 1021200-17
- Accuracy: ±1/16" at 100 ft (±1.5mm at 30m)
- Self-Leveling Range: ±10 arc minutes
- Working Range: Up to 2,600 ft diameter with LS-100D receiver
- Rotation Speed: 300, 600, or 1200 RPM selectable
- Power Source: 4 AA alkaline batteries
- Battery Life: Approximately 100 hours at standard rotation
- Protection Rating: IP66 (dust-tight, water-resistant)
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
- Laser Class: Class II (635nm visible red beam)
What's in the Kit
- Topcon RL-H5A self-leveling rotary laser
- Topcon LS-100D digital laser receiver with clamp
- 4 AA alkaline batteries
- Carrying case
- Operator's manual
Job Applications
Foundation Layout & Footing Elevations: Establish a consistent horizontal reference plane across an entire excavation. The RL-H5A's ±1/16" accuracy at 100 ft keeps footing elevations tight on residential and light commercial pours.
Concrete Flatwork & Slab Grading: Set screed rails, check subgrade elevation, and verify slab thickness in real time. The LS-100D's audible and visual grade indicators let your crew work fast without stopping to read a rod.
Site Grading & Drainage Slope: Use the horizontal plane as a benchmark to control cut-and-fill operations, establish drainage flow lines, and verify finish grade elevations across larger earthwork areas.
Interior Ceiling & Partition Work: The 300 RPM low-speed setting reduces beam flicker for interior applications—drop ceilings, partition framing, MEP rough-in—where a stable visible reference line is more useful than a fast outdoor sweep.
Compatible Accessories
- Topcon LS-100D Replacement Receiver
- Topcon RC-400DL Remote Control
- Heavy-Duty Laser Tripod
- Grade Rod with Receiver Clamp
- Topcon RL-H5A Carrying Case (Replacement)
Related Guides
- How to Set Up a Rotary Laser for Foundation Work
- RL-H5A vs. RL-H4C: Which Topcon Laser Is Right for Your Crew?
- Using the LS-100D Receiver for Grade Checking
- Rotary Laser Maintenance Tips for Jobsite Longevity
Frequently Asked Questions
- Does the Topcon RL-H5A work for slope or grade applications?
- The RL-H5A is a single-grade (horizontal-only) laser. It does not have a manual grade or dual-grade function. If you need percentage slope capability, consider the Topcon RL-SV2S or a comparable dual-grade model.
- What is the effective working range of this kit?
- Using the included LS-100D digital receiver outdoors, the RL-H5A delivers a working diameter of up to 2,600 feet (1,300 ft radius). Without a receiver, the visible beam is practical to roughly 200 feet in low-light conditions.
- Does this laser require rechargeable batteries or a charging system?
- No. The RL-H5A runs on 4 standard AA alkaline batteries with a rated life of approximately 100 hours. This makes it ideal for multi-site operations where charging infrastructure is limited or inconvenient.
- Is the Topcon RL-H5A compatible with other brand receivers?
- The RL-H5A emits a standard 635nm red laser signal compatible with most universal laser receivers. However, Topcon's LS-100D receiver included in this kit is optimized for use with Topcon lasers and provides the most reliable detection and grade-find performance.
Frequently Asked Questions
Does the Topcon RL-H5A work for slope or grade applications?
The RL-H5A is a single-grade (horizontal-only) laser. It does not have a manual grade or dual-grade function. If you need percentage slope capability, consider the Topcon RL-SV2S or a comparable dual-grade model.
What is the effective working range of this kit?
Using the included LS-100D digital receiver outdoors, the RL-H5A delivers a working diameter of up to 2,600 feet (1,300 ft radius). Without a receiver, the visible beam is practical to roughly 200 feet in low-light conditions.
Does this laser require rechargeable batteries or a charging system?
No. The RL-H5A runs on 4 standard AA alkaline batteries with a rated life of approximately 100 hours. This makes it ideal for multi-site operations where charging infrastructure is limited or inconvenient.
Is the Topcon RL-H5A compatible with other brand receivers?
The RL-H5A emits a standard 635nm red laser signal compatible with most universal laser receivers. However, Topcon's LS-100D receiver included in this kit is optimized for use with Topcon lasers and provides the most reliable detection and grade-find performance.
