The Topcon RL-H5A DB2 is a self-leveling horizontal rotary laser level engineered for North American contractors who demand accuracy, durability, and field-ready convenience in a single package. Scaled in inches, this complete kit eliminates costly unit-conversion errors on long grading days and delivers the precision professional crews expect on commercial site prep, subdivision layouts, and agricultural leveling. Whether you're setting elevations across a 10-acre pad or fine-grading a building foundation, the RL-H5A DB2 delivers consistent, repeatable results from sunup to sundown.
Product Overview & Jobsite Applications
The RL-H5A DB2 operates as a fully automatic self-leveling rotary laser with a working range of up to 800 meters in diameter when paired with the included LS-80L receiver. Its IP66-rated housing resists dust intrusion and water jets, keeping the instrument operational in the rain, mud, and rough handling that define active construction sites. The dual-grade capability and Xtreme Beam Technology (XBT) make it equally effective in bright outdoor conditions without sacrificing indoor usability. This kit is configured specifically with an inches-graduated rod, making it the go-to choice for contractors working in Imperial measurements throughout the United States and Canada.
Key Specifications
- Model: Topcon RL-H5A DB2
- Accuracy: ±10 arc seconds (±1.5mm at 30m)
- Self-Leveling Range: ±5°
- Working Range: Up to 800m diameter with LS-80L receiver
- Rotation Speed: 300 / 600 / 1000 RPM (selectable)
- Power Source: 4 x D-cell alkaline batteries
- Battery Life: Approximately 100 hours at 600 RPM
- IP Rating: IP66 dust-tight and water jet resistant
- Operating Temperature: -20°C to +50°C (-4°F to +122°F)
- Weight: 2.9 kg (6.4 lbs) with batteries
What's in the Kit
- Topcon RL-H5A DB2 horizontal rotary laser level with Xtreme Beam Technology
- LS-80L Laser Receiver — detects beam at up to 600m in typical outdoor conditions
- Inches-Graduated Grade Rod — direct Imperial reading, no conversion required
- Elevator Tripod — sturdy adjustable tripod for fast, stable instrument setup
- Receiver mounting bracket and clamp
- Carrying case for protected transport and storage
- 4 x D-cell batteries and operator's manual
Job Applications
Site Grading & Earthwork: Establish and maintain consistent cut/fill elevations across large pads. The 800m working diameter means one instrument setup covers most residential and light commercial grading operations without repositioning.
Foundation Layout: Transfer benchmark elevations to batter boards and footing forms with ±10 arc-second accuracy, reducing rework risk before concrete is poured.
Agricultural Land Leveling: Set drainage slopes and irrigation grades efficiently. The long battery life and wide operating temperature range keep the unit running through full field days in varying conditions.
Utility & Pipeline Installation: Maintain consistent invert elevations for gravity-fed sewer, storm drain, and irrigation lines using the inches rod for direct depth checks without conversion math.
Compatible Accessories
- Topcon LS-80L Replacement Laser Receiver
- Topcon RC-400 Remote Control for RL-H5A
- Replacement D-Cell Battery Pack for Rotary Lasers
- Heavy-Duty Aluminum Grade Rod – Inches Graduation
- Topcon RL-H5A Carrying Case (Replacement)
- Universal Rod Clamp for LS-80L Receiver
Related Guides
- How to Set Up a Rotary Laser Level for Site Grading
- Topcon RL-H5A vs. RL-H4C: Which Laser is Right for Your Project?
- Understanding Laser Receiver Range vs. Laser Visibility Range
- IP Ratings Explained: Why Dust and Water Resistance Matters on the Jobsite
Frequently Asked Questions
- What is the difference between the RL-H5A and the RL-H5A DB2?
- The DB2 designation indicates the dual-battery configuration and updated Xtreme Beam Technology (XBT), which produces a more visible beam in bright sunlight compared to the standard RL-H5A. The core self-leveling horizontal laser functionality is the same, but DB2 units offer enhanced outdoor visibility and longer battery run time.
- Does this kit include a metric rod, or is it inches only?
- This specific kit (model suffix -15-K2) is configured with an inches-graduated grade rod for Imperial measurement workflows. If your project requires metric graduation, Express Tools carries the corresponding metric-rod kit variant. Both kits include the same RL-H5A DB2 instrument and LS-80L receiver.
- What is the effective outdoor range of the LS-80L receiver?
- The LS-80L receiver is rated to detect the rotating laser beam at up to 600 meters under typical outdoor daylight conditions. Total working diameter with the receiver is up to 800 meters. Direct naked-eye visibility of the beam is much shorter and depends on ambient light; for outdoor work beyond approximately 15 meters, always use the receiver for reliable grade readings.
- Can the Topcon RL-H5A DB2 be used for indoor applications such as suspended ceilings or concrete floors?
- Yes. While the RL-H5A DB2 is optimized for large outdoor site work, its selectable rotation speed and self-leveling accuracy make it fully suitable for interior leveling tasks including suspended ceiling grid layout, concrete flatwork screeding, and setting column forms. Use the lower RPM settings indoors for easier beam detection with the receiver or detector glasses.
