The Job-Ready Topcon RL-H5A Rotary Laser Level Kit
The Topcon RL-H5A is one of the most trusted self-leveling rotary laser levels in professional contracting—and this complete DB2 kit puts everything your grading crew needs in a single order. Designed for mid-to-large scale earthwork, site prep, and flatwork operations, the RL-H5A delivers broadcast-grade horizontal accuracy across a full 360-degree sweep. Paired with the long-range LS-80L machine control receiver and a tenths-graduated grade rod, this kit is calibrated, matched, and ready to work the moment it arrives on the jobsite. General contractors, civil grading crews, concrete flatwork specialists, and irrigation installers all rely on the RL-H5A for its rugged build, reliable self-leveling, and all-day outdoor performance.
Jobsite-Proven Performance Overview
The RL-H5A is purpose-built for the demands of outdoor construction in variable conditions. Its automatic self-leveling system compensates for minor setup irregularities and keeps the beam true throughout the workday. The dual-grade capability allows contractors to simultaneously set slopes in two axes—a critical feature for drainage, paving, and site grading projects where cross-slope precision is required. The instrument's high-visibility diode and the LS-80L receiver's 600-meter working radius make it effective on large open sites where instrument-to-grade-rod distances regularly exceed what budget-grade tools can handle. Whether you're cutting a pad, establishing finish grade for a concrete pour, or grading a parking lot, the RL-H5A delivers the accuracy and range professional work demands.
Key Specifications
- Self-Leveling Range: ±5 degrees automatic compensation
- Accuracy: ±10 arc-seconds (±3mm at 30m)
- Operating Range: Up to 600m diameter with LS-80L receiver
- Rotation Speed: 300 / 600 / 1200 RPM selectable
- Grade Range: ±10% on single axis; dual-grade capable
- Power Source: AA batteries — up to 100 hours battery life
- IP Rating: IP66 dust and water resistant
- Receiver: Topcon LS-80L with 600m detection range in full sunlight
- Grade Rod: Tenths-graduated measuring rod for precision elevation transfer
- Tripod: Heavy-duty contractor tripod included
- Operating Temperature: -20°C to +50°C (-4°F to 122°F)
What's Included in the Kit
- Topcon RL-H5A Self-Leveling Rotary Laser Level
- LS-80L Digital Laser Receiver with rod clamp and carrying case
- Tenths-Graduated Grade Rod (contractor-standard rod calibrated in 0.1 ft increments)
- Heavy-Duty Adjustable Contractor Tripod
- AA Batteries (pre-installed, ready to operate)
- Carrying Case for laser instrument
- Operator's Manual and Calibration Documentation
Job Applications
The RL-H5A DB2 kit is used daily across a wide range of professional contracting disciplines:
- Site Grading & Earthwork: Establish accurate cut-and-fill grades across large open sites. The 600m receiver range means your rod person or machine operator stays in the beam even on wide commercial pads and highway right-of-way work.
- Concrete Flatwork & Slab Prep: Set screeds and forms to grade with ±10 arc-second accuracy. The tenths rod integrates directly with existing project documentation, eliminating conversion errors between decimal feet and fractions.
- Drainage & Irrigation Grading: Dual-grade functionality allows crews to establish precise cross-slopes for positive drainage on parking lots, athletic fields, and agricultural land-leveling projects.
- Foundations & Building Layout: Use the RL-H5A to transfer benchmark elevations around a building perimeter, set footing depths, and verify that poured walls meet grade tolerances before stripping forms.
Compatible Accessories
- Topcon LS-80L Laser Receiver (replacement/additional unit)
- Topcon RC-400DL Wireless Remote Control
- Topcon Heavy-Duty Contractor Tripod
- Tenths-Graduated Grade Rod (replacement)
- Universal Rod Clamp for LS-80L Receiver
- Topcon RL-H5A Replacement Carrying Case
Related Guides
- How to Set Grade with a Rotary Laser Level: Contractor Field Guide
- Rotary Laser vs. Pipe Laser: Choosing the Right Tool for Your Project
- How to Read a Tenths-Graduated Grade Rod
- Topcon RL-H5A Setup and Calibration Walkthrough
Frequently Asked Questions
- What is the working range of the Topcon RL-H5A with the LS-80L receiver?
- The LS-80L receiver can detect the RL-H5A's laser beam at distances up to 600 meters in diameter (300m radius) even in bright outdoor sunlight. This makes the kit suitable for large commercial sites, highway grading operations, and wide open agricultural applications where budget-grade systems fall short.
- Can the Topcon RL-H5A be used for dual-grade or slope work?
- Yes. The RL-H5A supports single-axis grade settings up to ±10%, and the DB2 configuration supports dual-grade functionality, allowing simultaneous slope in two axes. This is essential for cross-slope drainage work, parking lot grading, and agricultural land leveling where grade must be controlled in more than one direction at once.
- Why does this kit use a tenths-graduated rod instead of a standard 8ths rod?
- Decimal feet (tenths and hundredths) are the standard unit of measure in civil engineering, site grading, and most commercial construction plans in the United States. Tenths rods allow crews to read directly from the rod to match plan elevations without converting from fractional inches—reducing errors in the field and speeding up layout tasks significantly.
- Is the Topcon RL-H5A suitable for indoor use such as drop ceilings or interior slab work?
- The RL-H5A is optimized for outdoor use at long range. While it can be used indoors in large open buildings or warehouses, its high-speed rotation and long-range receiver are best matched to exterior grading and earthwork. For confined interior applications like suspended ceilings or partition layout, a cross-line or plumb laser may be more practical. That said, many contractors use the RL-H5A for interior concrete slab work in large commercial buildings without issue.
