The Topcon LS-B20 Machine Control Laser Receiver (SKU: 1063525-03) is a professional-grade, non-wireless receiver built for contractors who demand precise, interference-free grade control on active construction sites. As the proven successor to the LS-B10, this receiver delivers dependable laser signal acquisition across a wide detection window, keeping your heavy equipment on grade throughout every pass.
Overview & Jobsite Applications
Designed to integrate seamlessly with Topcon rotary and slope laser transmitters, the LS-B20 brings stable, wired signal communication to machine control systems on dozers, motor graders, and scrapers. Its wired connection architecture eliminates the radio interference risks associated with wireless receivers, making it the preferred choice on congested job sites where multiple machines and communication devices operate simultaneously. Whether you are finishing a road subgrade, cutting a site pad, or running tight drainage slopes, the LS-B20 keeps your blade or bowl tracking grade with consistent accuracy.
Key Specifications
- Model: Topcon LS-B20
- Part Number: 1063525-03
- Connection Type: Wired (non-wireless)
- Detection Window: Wide-range laser signal acquisition for extended vertical coverage
- Compatible Transmitters: Topcon rotary and slope laser systems
- Display: Dual-sided LED display with on-grade, above-grade, and below-grade indicators
- Mounting: Standard mast/pole mount compatible with Topcon machine control brackets
- Environmental Rating: Rugged housing designed for dust, vibration, and moisture exposure
- Power: Supplied via machine control system wiring harness
Key Features
- Wired connection architecture provides stable, interference-free signal transmission in RF-heavy environments
- Wide vertical detection window ensures consistent signal acquisition even on machines with significant blade float
- Dual-sided LED bar display gives operators clear on-grade, cut, and fill feedback from the cab
- Rugged sensor housing withstands the vibration, shock, and contamination typical of earthmoving equipment
- Seamless compatibility with Topcon 3D and 2D machine control systems for flexible fleet integration
- Successor to the LS-B10 with improved signal sensitivity and durability refinements
- Compact, low-profile form factor reduces snag risk during tight site maneuvers
Job Applications
Road Subgrade Preparation: Mount the LS-B20 on a motor grader to maintain consistent subgrade elevation across a road corridor, reducing re-work passes and material over-cut.
Site Pad Grading: Use on dozers during bulk earthmoving to track cut and fill elevations against a rotating laser plane, ensuring the finished pad meets design tolerance before compaction begins.
Drainage Slope Control: Pair with a Topcon slope laser transmitter to hold precise cross-slope or longitudinal grade on drainage swales and ditches where standing water tolerance is tight.
Scraper Operations: Install on push-pull or elevator scrapers to automate bowl depth control during topsoil stripping or borrow pit operations, improving cycle efficiency and operator consistency.
Compatible Accessories
- Topcon RL-H5A Rotary Laser Transmitter
- Topcon LS-B20W Wireless Upgrade Receiver
- Topcon Machine Control Mast & Bracket Kits
- Topcon MC-R3 Machine Control Indicate Box
- Replacement Wiring Harness for LS-Series Receivers
Related Guides
- How to Set Up a Laser Receiver for Dozer Grade Control
- Wired vs. Wireless Machine Control Receivers: Which Is Right for Your Site?
- Topcon Machine Control System Compatibility Guide
- Grade Control Basics for Heavy Equipment Operators
Frequently Asked Questions
- What is the difference between the Topcon LS-B20 and the LS-B20W?
- The LS-B20 uses a wired connection to communicate with the machine control system, while the LS-B20W adds wireless capability for remote adjustment and data transfer. The wired LS-B20 is preferred on sites with heavy radio frequency traffic where wireless signal reliability may be compromised.
- Is the Topcon LS-B20 compatible with non-Topcon laser transmitters?
- The LS-B20 is optimized for use with Topcon rotary and slope laser transmitters. Compatibility with third-party transmitters depends on laser frequency and signal type. Contact Express Tools for a compatibility check before purchasing.
- Can the LS-B20 be used on multiple machine types?
- Yes. The LS-B20 can be installed on dozers, motor graders, scrapers, and other earthmoving equipment using the appropriate Topcon machine control mast and bracket hardware. It integrates with both 2D indicate-only and full 3D automated control configurations.
- What does the LS-B20 replace?
- The LS-B20 is the direct successor to the Topcon LS-B10. It offers improved signal sensitivity and enhanced housing durability while maintaining backward compatibility with existing Topcon machine control system wiring and mounting infrastructure.
