What's the working range on the RL-HV1S, and can I use it on larger sites?

The laser generates a 2,600-foot diameter working range in most daylight conditions—that covers most residential and light commercial sites from a single setup. For larger sites, you can move the tripod and re-establish the plane; the automatic self-leveling means no manual fine-tuning on each move.

How long do the alkaline batteries last on a full day of grading?

Alkaline batteries provide full-day runtime on most job sites, typically 8–10 hours of continuous operation depending on ambient temperature and laser rotation speed. You can swap fresh batteries in the field in under a minute if needed, and the cost is minimal compared to rechargeable systems.

Does the LS-80X receiver work in bright sunlight?

The LS-80X is designed for outdoor use and picks up the Class 2 red laser reliably in most daylight and bright sunlight conditions. If you're working in extreme glare or very bright days, the receiver's LCD may be harder to read, but the audio alert function helps your operator stay on grade by sound alone.

Can I use this laser for slopes steeper than the self-leveling range?

The RL-HV1S self-levels within ±5 degrees automatically, so you can set up on slopes up to 5 degrees without manual adjustment. For slopes steeper than 5 degrees, you'll need to manually tilt the laser and use the electronic grade control to dial in the desired slope—this is where the single-axis capability shines.

What's the accuracy I can expect in the field?

Accuracy is ±10 arc seconds across the full 2,600-foot diameter, which translates to roughly ±1/8 inch per 100 feet. This is more than tight enough for foundation, grading, and utility work; you'll hold tighter tolerances than your crews can physically execute.

Will the RL-HV1S work on an excavator bucket, or do I need a separate pole?

The kit includes a machine clamp mount, so you can bolt the LS-80X receiver directly to your excavator bucket, grader, or any machinery. You can also use the included rod bracket to mount it on a laser rod or grade pole if you prefer manual spotting.

Topcon LS-80A Laser Receiver Sensor 313510702

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At a Glance

Brand: Topcon
Model: RL-HV1S Self-Leveling Single Grade Laser DB Kit with LS-80X Receiver and Alkaline Batteries
Sku: 1051612-28
Laser Type: Self-leveling single grade rotary laser
Accuracy: ±10 arc seconds
Working Range Diameter: 2,600 feet

TopconLS-80ASKU Topcon-RL-HV1S P.AWDBX with LS-80X / 1051612-28New

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Topcon LS-80A Laser Receiver Sensor

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2,600 feet Range

Cover large layout jobs with a 2,600 feet working reach.

±10 arc seconds Accuracy

Hold grade with a ±10 arc seconds accuracy rating.

Grade Control

Handles Electronic single axis capability so crews can match design slopes.

Power Source

Runs on Alkaline batteries for jobsite flexibility.

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Quick Answer

What is the Topcon LS-80A?

The Topcon LS-80A Laser Receiver Sensor is a Topcon Laser Receiver with ±10 arc seconds accuracy, 2,600 feet working range diameter, and ±5 degrees automatic leveling self leveling range. It's available from Express Tools as an authorized Topcon dealer with same-day shipping on in-stock orders.

FIELD APPLICATIONS

What contractors use this laser receivers for

Excavation and Cut-Fill Operations

Mount the LS-80X receiver to your excavator bucket and let your operator see real-time elevation feedback as they cut and fill to grade. The audio alerts accelerate as you approach the laser plane, eliminating guesswork and reducing over-cut waste on every load.

Foundation and Grade Beam Setting

Use the single-axis grade capability to establish consistent elevation across foundation footings and grade beams before concrete pour. The ±10 arc second accuracy ensures forms are set to spec, reducing rework and callbacks.

Utility Trench Grading

Set consistent drainage slope in sewer lines, storm drain, and water main trenches with the electronic single-axis control. Your crew verifies depth and slope in minutes instead of hours of manual checking with transit and rod.

Site Prep and Fill Verification

Run the laser during rough grading and fill placement to hold elevation across the entire job. The 2,600-foot working diameter covers most residential and light commercial sites from a single laser setup.

Concrete Pad and Slab Grading

Set and verify finish grades for parking lots, warehouse slabs, and residential flatwork before concrete placement. The visible red laser beam and self-leveling head get you on grade fast, keeping the concrete crew moving on schedule.

PRODUCT OVERVIEW

Product Description

Topcon LS-80A Laser Receiver Sensor for Grade Control

The Topcon LS-80A (Part No. 313510702) is a professional-grade, hand-held laser receiver engineered to detect and measure signals from conventional rotating lasers in demanding construction and utility grade control environments. Whether you're grading a large commercial pad, setting pipe, or establishing elevation benchmarks across sprawling sites, the LS-80A delivers the immediate, accurate feedback that keeps crews productive and grades dead-on. Built for the daily punishment of real jobsites, this receiver combines a wide detection window, multiple alert modes, and durable weather-resistant housing into a compact tool that experienced operators trust.

Overview and Jobsite Applications

Rotating lasers are only as useful as the receiver paired with them. The Topcon LS-80A bridges the gap between the laser plane and the operator on the ground, translating the laser signal into clear directional guidance — up, on-grade, or down — via both audible alerts and a bright LED display visible in direct sunlight. Its broad vertical detection range means less repositioning on a grade rod, keeping field work moving at pace. The LS-80A is compatible with most major brands of rotating laser systems, making it a versatile addition to any contractor's toolkit whether operating with Topcon, other rotating laser platforms, or a mixed fleet of equipment.

Key Specifications

Model: Topcon LS-80A
Part Number: 313510702
Detection Range: Up to 800 m (2,600 ft) diameter with rotating laser
Detection Window: 165 mm (6.5 in) vertical detection zone
Accuracy: ±1.5 mm (±1/16 in)
Display: LED directional indicators with on-grade confirmation
Audio Alert: Variable-pitch buzzer with selectable modes
Water Resistance: Weather and dust-resistant housing for outdoor use
Power: 2 x AA batteries
Clamp Compatibility: Standard grade rod and staff clamp mount
Operating Temperature: -20°C to +50°C (-4°F to +122°F)

Key Features

Wide Detection Window: 165 mm vertical zone reduces rod adjustments and speeds up workflow
High-Visibility LED Display: Clear up/on-grade/down indicators readable in bright sunlight
Variable Audio Alerts: Audible tones intensify as the laser beam approaches grade — ideal for noisy jobsite environments
Long Detection Range: Effective up to 800 m diameter, suitable for large commercial grading and civil projects
Broad Compatibility: Works with most standard rotating laser systems, not limited to Topcon equipment
Durable Construction: Weather-resistant housing designed for daily jobsite exposure
Ergonomic Design: Comfortable hand-held grip and rod-mount clamp for flexible use
Long Battery Life: Efficient power draw on standard AA batteries for extended field use

Job Applications

Site Grading and Earthwork: Mount the LS-80A on a grade rod and use it with a rotating laser to establish and verify cut/fill grades across large commercial or residential pads. The wide detection window and loud audio alerts let operators work quickly without constantly stopping to read the display.

Underground Utility and Pipe Laying: Set pipe to grade in trenches with confidence. The LS-80A's precision and reliable signal detection help crews maintain consistent invert elevations across long utility runs where accuracy directly impacts system performance.

Concrete Flatwork and Sub-Base Prep: Use the receiver during screeding, sub-base compaction checks, and form setting to ensure finished grades meet specification before concrete is placed — reducing costly rework.

Landscape Grading and Drainage: Establish positive drainage slopes around structures and in landscaping applications where subtle grade differences have major water management consequences. The LS-80A's ±1.5 mm accuracy ensures drainage intent is faithfully executed.

Compatible Accessories

Related Guides

Frequently Asked Questions

Is the Topcon LS-80A compatible with non-Topcon rotating lasers?: Yes. The LS-80A is designed to work with most standard rotating laser systems regardless of brand, making it a flexible choice for contractors who operate mixed equipment fleets. Always verify your specific laser's frequency compatibility before purchase.
What is the maximum detection range of the LS-80A?: The LS-80A can detect a rotating laser signal up to 800 meters (approximately 2,600 feet) in diameter under favorable conditions, making it well-suited for large-scale grading and civil construction projects.
Does the LS-80A work in rain or dusty conditions?: The LS-80A features a weather and dust-resistant housing that holds up to typical outdoor jobsite conditions, including light rain and heavy dust exposure. It is not rated for submersion, so avoid full immersion in water.
How accurate is the Topcon LS-80A for grade control?: The LS-80A provides an accuracy of ±1.5 mm (±1/16 inch), which is well within tolerance for the vast majority of grading, utility, and flatwork applications in commercial and residential construction.

Why This Equipment

Large Capture Window

Wide detection zone catches the laser beam at distance without precise aiming.

Radio Compatibility

Pairs directly with compatible transmitters for wireless grade control.

Jobsite Tough

Rubber-armored housing rated for drops, dust, and continuous outdoor use.

Grade Resolution

Fine grade detection down to 1/16" — the precision your job spec requires.

KIT CONTENTS

What's In The Box

Topcon RL-HV1S Self-Leveling Single Grade Laser Head
LS-80X Machine Receiver
Rod Bracket for Laser Rod
Machine Clamp Mount
Alkaline Batteries (included)
User Manual and Quick Start Guide

Why Buy This?

The right receiver extends your laser. A lot.

Most rotary and grade lasers ship without a receiver — because different jobs need different detection windows. A standard handheld receiver works for grading and site layout. Machine-mount receivers survive dozer and scraper duty.

Matching receiver to laser matters: grade resolution, radio compatibility, and capture-height window all affect how accurately you can work at distance. Using a mismatched receiver is the leading cause of grade errors that pass QC but fail inspection.

Express Tools stocks the receivers your laser manufacturer recommends — not just what fits in the box. We can tell you exactly which receiver pairs with your existing laser if you call.

TECHNICAL SPECS

Specifications

Technical Specs

Manufacturer data and field-verified measurements.

Brand	Topcon
Model	RL-HV1S Self-Leveling Single Grade Laser DB Kit with LS-80X Receiver and Alkaline Batteries
Sku	1051612-28
Laser Type	Self-leveling single grade rotary laser
Accuracy	±10 arc seconds
Working Range Diameter	2,600 feet
Self Leveling Range	±5 degrees automatic leveling
Leveling System	Pendulum compensation system
Grade Control	Electronic single axis capability
Power Source	Alkaline batteries
Tripod Connection	5/8-11 standard thread
Receiver Model	LS-80X
Power	2 x AA batteries
Operating Temperature	-20°C to +50°C (-4°F to +122°F)

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