L-740 Ultra-precision Leveling Laser


The L-740 Ultra-Precision Leveling Laser provides an ultra-flat plane of light for quick, easy flatness and levelness measurements. It has an integrated precision leveling base with illuminated level vials accurate up to 1 arc second (0.00006"/ft. or 0.005 mm/M) and coarse and fine adjustments for pitch and roll.

The laser plane is flat to 0.5 arc second (0.00003"/ft. or 0.002 mm/M) in a 360º sweep and 0.25 arc sec (0.000015"/ft. or 0.0013 mm/M) in a 90º sweep. It has an operational range of 100 feet (30.5 meters) in radius.

The L-740 has coarse and fine Pitch and Roll adjustments to level the laser or to make it parallel to reference points. The diode laser is low power (less than 1 mW) and visible to the naked eye for easier setup.


  • For applications with tolerances of 0.00002"/ft. or 0.0017 mm/M or higher
  • High accuracy leveling of almost any surface
  • Measuring the flatness of almost any surface (squares, frames, ways, flanges, circles, etc.)
  • Measuring and leveling machine beds and machine ways, large bearing surfaces, and fabrications
  • Measuring way twist and parallelism between horizontal and vertical surfaces
  • Aerospace tooling leveling/floor alignment and wing assembly flatness
  • Surface plate calibration
  • Turbine split-joint leveling/measuring
  • Continuous casters roll flatness alignment
  • Flatness and leveling of machining centers (HBM, VBM, VTL, VMC, HMC, Gantries, Surface Grinders)
  • Large lathe beds
  • Flatness and parallelism of platens on presses.


  • Continuously rotating laser plane with 100' (30.5 meters) radius operating range.
  • Includes Pitch/Roll/Yaw adjustment base with coarse and fine adjustments.
  • Standard illuminated levels accurate to 2 arc second (0.00012"/ft. or 0.01 mm/M).
  • Optional High-Accuracy, Split-Prism illuminated levels accurate to 1 arc second (0.00006"/ft. or 0.005 mm/M).
  • High Accuracy Targets: A-1519-2.4ZB Single-Axis, Wireless Target - 1" (24.5 mm) PSD, .00002" (0.0005 mm) Resolution.
  • Ultra Accuracy Targets: Uses A-1520-2.4ZB Single-Axis Wireless Target - .25" PSD and .00002” (0.00025 mm)
  • Wireless targets provide live alignment data updating
  • Align and monitor multiple axes simultaneously using 1-99 targets at the same time.
  • Laser and targets fit into a portable shipping case.
  • Quick warm up.
  • Setup in as little as 10 minutes.
  • Uses A/C adapter or battery pack.
  • Interfaces with Plane5 software to wirelessly download flatness data to provide 3d mapping and analysis of surface flatness.


Weight: Laser: 6.75 lbs (3.1 kg)
L-123 Base: 10 lbs (4.54 kg)
Material: Laser: Aluminum and Stainless Steel
Laser Type: Visible diode, 670 nM wavelength Class II (Class I in scanning mode) .160" (4.06mm) beam diameter
Operating Distance: 100 feet (33M) in radius
Beam Power: <0.9 mW
Beam Stability: Translation: .0001 in/hr/ºF (.005mm/hr/ºC)
Angular: 0.2 arc sec/hr/ºF (0.36 arcsec/hr/ºC)
Beam Straightness: 0.000015"/ft.(0.001mm/M) +/- .0001" air noise
Laser Plane Flatness: 0.5 arcsec or 0.00003"/ft (0.0025 mm/M) + maximum translation error of +/- .0001 " (0.0025 mm) in a 180 º /360º sweep.
0.25 arcsec or 0.000015/ft (.001 mm/M) + maximum translation error of +/-.00005 " (0.0013 mm) in a 90º sweep
Operating Range: 100 feet (30.5 meters) in radius
Operating Mode: Single beam and/or continuously rotating plane
Clip-on or Plug-in Power Supply: Powered by a 9V DC external battery pack (2 cells) (3-4 hrs. of continuous operation) or a 115V AC adapter
L-123 Base Adj. Range:
Coarse adjustment: +/- 1.5º
Fine Adjustment: +/- 0.15º
L-123 Base Adj. Resolution:

Coarse adjustmen:t
1.7 arcsec (0.01 inches/100 ft or 0.25 mm/30M):
Fine Adjustment:
0.17 arcsec (.001 inches/100 ft or 0.025 mm/30.5M)

Level Vials: 2 illuminated, level vials accurate to 2-arc-seconds (.00012”/ft or 0.01 mm/M)
Split-Prism Upgrade: Accurate to 1 arc second (0.00006"/ft or 0.005 mm/M)