Topcon RL-H5B Self-Leveling Laser PS.DB Kit with LS-80X Receiver - 1021200-73 (uses Alkaline Batteries)

Precision Rotary Laser for Grade Control, Concrete Finishing, and Building Layout

The Topcon RL-H5B is the next-generation upgrade to the industry-proven RL-H5A, delivering improved self-leveling accuracy, faster beam stabilization, and a more rugged field-ready design. Whether you're pouring slabs, grading highway cuts, or establishing control points across a large structure, the RL-H5B gives your crew a reliable, repeatable reference plane that reduces rework and keeps the job on schedule. Paired with the LS-80X receiver and powered by standard alkaline batteries, this kit is ready to work without proprietary chargers or battery systems slowing you down.

Rotary Laser Overview and Jobsite Applications

The RL-H5B operates as a single-slope and dual-slope grade laser, making it one of the most versatile horizontal lasers in the Topcon lineup. Its pendulum-based self-leveling system compensates automatically within a ±5° range and locks out of level when the tilt exceeds that threshold — protecting your crew from working off a bad plane. The high-brightness laser diode maintains a visible beam across a full 360° sweep, and the LS-80X receiver extends working range significantly beyond naked-eye visibility in bright daylight conditions. This system is widely used by concrete contractors, civil grading crews, utility installers, and building layout teams who need consistent, drift-free elevation control throughout the workday.

Key Specifications

• Accuracy: ±1.5mm at 30m (±1/16" at 100ft)
• Self-leveling range: ±5°
• Grade range: 0% to ±10% on single axis; dual-slope mode available
• Rotation speed: 600 RPM standard operating speed
• Working range: up to 800m diameter with LS-80X receiver
• Laser class: Class 3R (IEC 60825-1)
• Laser wavelength: 635nm (visible red)
• Power source: D-cell alkaline batteries (x4), up to 100 hours runtime
• IP rating: IP66 — dust-tight and protected against powerful water jets
• Operating temperature: -20°C to +50°C (-4°F to +122°F)
• Weight: approximately 2.6 kg (5.7 lbs) with batteries

What's in the Kit

• Topcon RL-H5B rotary laser transmitter
• LS-80X laser receiver with LCD grade readout and audible grade indicators
• LS-80X receiver mounting clamp for grade rod or staff
• D-cell alkaline batteries (x4) — no charger required
• Padded carrying case for field transport and storage
• Operator's manual and calibration documentation

Job Applications

Concrete Slab Pours: Set your RL-H5B on a tripod at one end of the pour zone and let the LS-80X receiver guide screed operators and rod men to the correct elevation across the entire slab. The fast-settling pendulum means less waiting between setups when you move the instrument.

Highway and Site Grading: The dual-slope capability lets you model crowned road sections or cross-sloped pads in a single setup. Grade the cut while the machine operator reads the LS-80X mounted to the blade mast — no manual grade checks required between passes.

Building Layout and Elevations: Transfer benchmark elevations to multiple points around a structure perimeter without running a level loop. The 800m working diameter gives you flexibility on larger commercial footprints where a single instrument position needs to serve multiple trades.

Utility Trench Control: Mount the LS-80X to a grade rod inside the trench and use the audible tone guidance to maintain pipe fall without stopping the excavator. The IP66 housing on the RL-H5B keeps it running through site wash-down and typical rain events.

Compatible Accessories

• Topcon LS-80X Replacement Receiver
• Topcon RC-40 Wireless Remote Control
• Heavy-Duty Aluminum Tripod for Rotary Lasers
• Telescoping Grade Rod — 25ft Fiberglass
• Topcon Carrying Case Replacement
• Machine Control Mast Bracket for LS-80X

Related Guides

• How to Set Up a Rotary Laser for Concrete Finishing
• Single-Slope vs. Dual-Slope Lasers: Which Do You Need?
• Topcon RL-H5A vs. RL-H5B: What Changed and Why It Matters
• Choosing the Right Laser Receiver for Outdoor Grade Work

Frequently Asked Questions

What is the difference between the Topcon RL-H5A and the RL-H5B?

The RL-H5B improves on the RL-H5A with tighter self-leveling accuracy (±1.5mm at 30m vs. ±2mm), faster pendulum stabilization after instrument movement, and a redesigned housing with better IP66 sealing. For most contractors, the RL-H5B is a direct drop-in upgrade that performs more consistently under heavy daily use.

Does the RL-H5B work with machine control systems?

The RL-H5B transmitter is compatible with Topcon machine control receivers such as the LS-80X when mounted on a blade mast or bucket sensor bracket. For fully automated machine control (motor graders, dozers), a dedicated machine control receiver like the Topcon LS-B110W is recommended. Consult Express Tools for a machine control configuration quote.

How long do the batteries last in the RL-H5B?

Using four standard D-cell alkaline batteries, the RL-H5B delivers up to 100 hours of continuous operation. This is one of the practical advantages of alkaline power over lithium-ion systems — batteries are available at any hardware store or job trailer, and you're never waiting on a charge cycle to start the day.

Is the LS-80X receiver included, and can I use other receivers with the RL-H5B?

Yes, the LS-80X receiver is included in this kit (model 1021200-73). The RL-H5B is also compatible with other Topcon receivers including the LS-80L and select compatible receivers from other manufacturers. The LS-80X is recommended for its combination of extended range, LCD numeric grade display, and adjustable audio sensitivity, which suits both hand-rod and machine-mount applications.