SitePro SK28X Transit Level

The Topcon RL-HV1S Single Grade Rotary Laser is a field-proven solution engineered for contractors who demand repeatable accuracy on grading, drainage, and excavation projects. Bundled with the LS-80X laser receiver and alkaline batteries, this kit ships ready to deploy—no charging delays, no sourcing accessories separately. Whether you're setting finish grade on a commercial pad or cutting a drainage swale across a sprawling site, the RL-HV1S delivers the precision and reliability professional crews expect from Topcon.

Overview & Jobsite Applications

Designed for contractors working in civil construction, site development, landscaping, and agricultural grading, the RL-HV1S combines a self-leveling rotary laser with single-axis slope capability. The instrument automatically levels within its compensator range, then holds grade accurately across the entire 360-degree beam plane. The LS-80X receiver extends detection range to 800 meters in diameter, giving machine operators and grade checkers the reach they need on large open sites. The alkaline battery configuration eliminates dependence on charging infrastructure, making this system ideal for remote sites, early-stage construction where power is unavailable, or contractors who rotate multiple instruments across crews.

Key Specifications

• Accuracy: ±1mm at 10m (±3/32" at 30 ft)
• Self-Leveling Range: ±5 degrees automatic compensator
• Slope Range (Single Axis): 0% to ±10%
• Rotation Speed: 300, 600, or 1200 RPM selectable
• Operating Range: Up to 800m diameter with LS-80X receiver
• Laser Class: Class 3R, 635nm red beam
• Power Source: Alkaline D-cell batteries (included)
• Battery Life: Approximately 100 hours typical operation
• IP Rating: IP66 dust and water resistant
• Operating Temperature: -20°C to +50°C (-4°F to +122°F)

What's in the Kit

• Topcon RL-HV1S single-grade rotary laser instrument
• LS-80X laser receiver with rod bracket and carrying pouch
• Alkaline D-cell batteries for extended field operation without charging
• Receiver with audible and visual grade confirmation — on-grade, above, and below indicators
• Instrument carrying case for transport and storage
• Operator's manual and quick-start guide

Job Applications

Site Grading & Earthwork: Set and hold single-axis slope grades during cut-and-fill operations. The RL-HV1S maintains grade lock while the LS-80X gives dozer and scraper operators continuous real-time feedback across the full site width.

Drainage & Pipe Installation: Establish consistent fall percentages for storm sewer, sanitary, and agricultural drainage runs. The precise slope-set capability eliminates repeated check shots and keeps pipe crews moving at production pace.

Concrete Flatwork: Use the rotating beam to establish floor and slab elevations across large pours. The audible LS-80X receiver lets a single operator confirm grade at the screed without a second crew member on the instrument.

Landscaping & Athletic Fields: Achieve uniform positive drainage grades on turf installations, retention ponds, and sports fields where consistent slope tolerances are required across wide open areas.

Compatible Accessories

• Topcon LS-80X Replacement Receiver
• Topcon RD-1 Remote Control for RL-HV1S
• Heavy-Duty Aluminum Laser Tripod
• Grade Rod with Metric and Imperial Graduations
• Topcon Instrument Carrying Case (Hard Shell)
• Alkaline D-Cell Battery Replacement Pack

Related Guides

• How to Set Single-Axis Slope with the Topcon RL-HV1S
• LS-80X Receiver Setup and Sensitivity Adjustment Guide
• Rotary Laser vs. Pipe Laser: Choosing the Right Tool for Drainage Work
• Topcon RL-HV1S vs. RL-SV2S: Which Grade Laser Is Right for Your Crew?

Frequently Asked Questions

Does the RL-HV1S support dual-axis slope?

No. The RL-HV1S is a single-grade (single-axis) laser, meaning it can be set to a slope in one direction at a time. For simultaneous X and Y axis slope control, consider the Topcon RL-SV2S or RL-HV2S dual-grade models.

Can the RL-HV1S be used with machine control systems?

The RL-HV1S is primarily designed for grade checking and manual grading operations using the LS-80X receiver. For full machine control integration, Topcon offers dedicated machine control laser and receiver packages. Contact Express Tools to discuss the right system for your equipment.

Why does this kit include alkaline batteries instead of rechargeable?

The alkaline battery configuration is intentional for contractors operating on remote sites, early-phase construction without available power, or those managing multiple instruments across crews. Alkaline D-cells are universally available, offer approximately 100 hours of run time, and eliminate dependency on charging stations or spare battery management.

What is the effective range of the LS-80X receiver?

The LS-80X laser receiver is rated for use up to 800 meters in diameter (400-meter radius) under open outdoor conditions. Range may be reduced in bright direct sunlight; using the sun shield accessory on the receiver can help maintain detection at maximum distances.