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Self-Leveling Rotary Lasers
The Short Answer
A self-leveling rotary laser levels itself electronically or via pendulum within a set range (typically ±5°), then spins a reference beam a receiver reads anywhere on site — the modern standard for slabs, pads, footings, and elevation control. The most-used models are the Topcon RL-H5A, Spectra Precision LL300N, and Leica Rugby series, all stocked at Express Tools.
Self-leveling is what made rotary lasers one-person tools: set the laser on a tripod roughly level, and it dials itself in and re-levels automatically after bumps — with height-alert protection that stops the beam rather than feed you a wrong grade if the tripod gets knocked.
The practical differences between models are range, battery life, drop rating, and the receiver bundled in the package — the table stakes (self-leveling, ±1/16 in accuracy class) are shared across the professional field.
Self-Leveling Rotary Lasers In Stock
Topcon
Topcon Machine Control Kit with RL-HV2S Self-Leveling Dual Grade Laser, Deluxe LS-100D Receiver, Inch Rod, Tripod / Rechargeable - Machine Receiver and Magnetic Mount - Model 1051612-22-K2-LS-B200W-MM
Starting at
$4,895
Topcon
Topcon RL-HV2S Self-Leveling Dual Grade Laser Complete Kit with LS-100D Receiver, Inches Rod and Tripod - Rechargeable - 1051612-22-K2
Starting at
$2,195
Topcon
Topcon RL-HV2S Self-Leveling Dual Grade Laser Complete Kit with LS-100D Receiver, Tenths Rod and Tripod / Rechargeable - 1051612-22-K1
Starting at
$2,195
Topcon
Topcon RL-HV2S Self-Leveling Dual Grade Laser DB Kit with LS-80X Receiver, Inches Rod and Tripod / Alkaline - 1051612-21-K2
Starting at
$1,975
Topcon
Topcon RL-SV1S Self-Leveling Single Grade Laser RB Kit with LS-80L Receiver and Rechargeable Batteries
Starting at
$1,795
Topcon
RL-H5A Self-Leveling Laser PS.RB Kit with LS-100D Receiver, Rechargeable Batteries, Grade Rod INCHES and Tripod - 1021200-16-K2
Starting at
$1,065
Topcon
RL-H5A Self-Leveling Laser PS.DB Kit with LS-100D Receiver, Grade Rod INCHES and Tripod - 1021200-17-K2
Starting at
$1,025
Topcon
Topcon RL-H5A Self-Leveling Laser PS.DB Kit with LS-80L Receiver, Measuring Rod 10ths and Tripod - 1035258-01 (uses Alkaline Batteries)
Starting at
$785
Topcon
Topcon RL-H5A Self-Leveling Laser PS.DB2 Kit with LS-80X Receiver, Measuring Rod INCHES and Tripod - 1021200-50-K2
Starting at
$785
Topcon
Topcon RL-H5B Self-Leveling Laser PS.DB2 Kit with LS-80L Receiver, Alkaline Batteries, Grade Rod Inches and Tripod- 1021200-33-K2
Starting at
$660
Topcon
Topcon RL-H5B Self-Leveling Laser PS.DB2 Kit with LS-80X Receiver, Alkaline Batteries, Grade Rod Inches and Tripod- 1021200-73-K2
Starting at
$660
Frequently Asked Questions
How does a self-leveling rotary laser work?
Inside the housing, a pendulum-and-servo or electronic tilt-sensor system trues the rotating beam to level once you get the instrument within its compensation range (about ±5° by eye). If the laser is bumped past that range, it stops and alerts instead of projecting a bad plane.
What is the best self-leveling rotary laser?
The Topcon RL-H5A is the best-selling choice — 800 m (2,600 ft) working diameter, ~100-hour battery life, IP66. The Spectra LL300N is its equal for most crews with a tougher roll cage and strong package pricing. Leica Rugby rounds out the professional field. Match range and package contents to your sites.
What does "height alert" or "HI alert" mean?
If the tripod settles or gets bumped after setup, the laser’s height changes and every reading after that is silently wrong. Height-alert systems detect the disturbance and shut the beam off, forcing a re-check — a small feature that prevents expensive re-pours and re-grades.
How do I keep records of the grades I shoot?
Log each check — location, design grade, actual reading — as you go. Gradelog, our field documentation app, records grade shots with GPS, photos, and automatic pass/fail and turns them into inspector-ready reports. There is a free plan for small crews.
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