Topcon RL-H5A Rotary Laser Kit with LS-80L Receiver
The Topcon RL-H5A RS kit (model 1021200-14) delivers a field-ready grade control solution for contractors who need reliable horizontal leveling from the first setup to the last stake. Bundled with the LS-80L laser receiver and a rechargeable battery pack with holder, this kit covers concrete flatwork, site preparation, drainage grading, and general building layout across job sites ranging from small residential pads to large commercial earthwork projects — all without calling in a survey crew.
System Overview and Jobsite Applications
The RL-H5A transmitter uses Topcon's proven self-leveling pendulum mechanism to establish a 360-degree horizontal reference plane in seconds. Paired with the LS-80L rod-mounted receiver, crews can read grade at distances the naked eye can't track, making it the go-to setup for concrete finishers establishing slab elevation, equipment operators grading drainage swales, and framing crews setting foundation elevation across uneven terrain. The rechargeable battery system cuts consumable costs on long pours and extended grading shifts.
Key Specifications
- Model: Topcon RL-H5A RS — SKU 1021200-14
- Leveling Method: Automatic self-leveling pendulum
- Leveling Range: ±5 degrees
- Working Diameter: Up to 2,600 ft (800 m) with receiver
- Accuracy: ±1/16 in at 100 ft (±1.5 mm at 30 m)
- Rotation Speed: 600 RPM standard, 300 and 1,200 RPM selectable
- Laser Class: Class IIIa / Class 3R
- Receiver: Topcon LS-80L with 31.5 in (800 mm) detection window
- Power: Rechargeable NiMH battery pack + holder included
- Battery Life: Up to 100 hours on rechargeable pack
- IP Rating: IP66 — dust-tight and water jet resistant
- Operating Temperature: -4°F to 122°F (-20°C to 50°C)
What's in the Kit
- Topcon RL-H5A self-leveling rotary laser transmitter
- LS-80L laser receiver with mounting clamp
- Rechargeable NiMH battery pack
- Battery holder for standard alkaline AA cells (backup)
- Battery charger
- Carrying case
- Operator's manual
Job Applications
Concrete Flatwork and Slab Pours: Set the RL-H5A at slab elevation, mount the LS-80L on a grade rod, and screed crews maintain finished floor height across the entire pour without constant pin checking. The 1,200 RPM high-speed mode keeps the receiver signal solid as finishers move quickly across wet concrete.
Site Grading and Earthwork: Equipment operators clip the LS-80L to a grade rod on the blade or bucket and use the audible and visual grade indicators to hit design elevation in fewer passes. The 2,600 ft working diameter covers large cut-and-fill sites from a single instrument setup.
Drainage and Utility Trench Grading: Establish consistent pipe fall or swale grades over long runs. The RL-H5A's horizontal plane combined with the LS-80L's tall detection window makes it easy to catch grade in deep trenches where sight lines are limited.
Foundation and Footing Layout: Residential and light commercial crews use the system to transfer elevation benchmarks around a foundation perimeter, verify footing form heights, and confirm slab-on-grade elevation relative to finished floor design.
Compatible Accessories
- Topcon LS-80L Replacement Receiver
- Topcon RC-40 Remote Control for RL-H5A
- Topcon Grade Rod and Clamp Set
- Topcon RL-H5A Replacement Rechargeable Battery Pack
- Heavy-Duty Tripod for Rotary Lasers
- Topcon Laser Detector Holder and Clamp Accessories
Related Guides
- How to Set Up a Rotary Laser for Concrete Flatwork
- RL-H5A vs RL-H4C: Which Topcon Laser Is Right for Your Crew?
- Understanding Laser Receiver Grade Indicators on the Jobsite
- Rotary Laser Maintenance and IP Rating Guide for Contractors
Frequently Asked Questions
- What is the working range of the Topcon RL-H5A with the LS-80L receiver?
- With the LS-80L receiver, the RL-H5A has a working diameter of up to 2,600 feet (800 meters), making it suitable for large site grading and commercial flatwork projects from a single setup point.
- Does the RL-H5A kit include everything needed to start grading?
- Yes. The 1021200-14 kit includes the RL-H5A transmitter, LS-80L receiver with clamp, rechargeable battery pack, battery holder, charger, and carrying case. You will need a tripod or grade rod, which are sold separately.
- Can the RL-H5A be used in rain or dusty site conditions?
- Yes. The RL-H5A carries an IP66 rating, meaning it is fully protected against dust ingress and resistant to heavy water jets. It is built for active construction environments including concrete pours and exposed earthwork sites.
- How long does the rechargeable battery last on the RL-H5A?
- Topcon rates the included rechargeable NiMH battery pack for up to 100 hours of continuous operation. The kit also includes a standard alkaline battery holder as a backup power source for extended jobs or remote sites without charging access.
