L-740 Ultra-Precision Leveling Laser

L-740 Ultra-Precision Leveling Laser


Designed primarily for high-accuracy flatness measurements, the L-740 Ultra-Precision Leveling Laser has 1 horizontal, auto-rotating laser plane that is flat 0.5 arc seconds (.00003 in./ft or 0.0025 mm/m) in a 360º sweep and 0.25 arc second in a 90º sweep.  It also features 3-arc-second illuminated level vials.

The laser is mounted on an adjustable base with coarse and fine pitch and roll adjustments, so that the laser plane can project the measurement reference out to 100 feet (30.5 m) in radius in all directions. The laser is completely self-contained and can operate on battery or AC power.


Measuring and aligning:

  • The flatness and straightness of almost any horizontal surface up to 100 feet (30.5 m) (squares, frames, ways, flanges, circles, etc.)
  • The flatness and straightness of horizontal surfaces
  • The straightness of horizontally traversing axes of machine tools
  • The parallelism of horizontal surfaces
  • Checking machine-tool guideway twist in horizontal axes, machine beds and parallelism between horizontal guideways
  • Measuring surfaces up to 200 feet (61 meters) long with 1 setup


  • 1 continuously rotating, horizontal laser plane with operational range of 100 feet (30.5 m) in radius.
  • High accuracy:  laser plane flat to 0.5 arc seconds (.00003 in./ft. or 0.0025 mm/m) in a 360º sweep and 0.25 arc second in a 90º sweep
  • Includes Pitch/Roll adjustment base with coarse and fine adjustments.
  • Standard illuminated levels accurate to 3 arc second (.00018 in./ft. or 0.015 mm/m)).
  • Optional L-740SP high-accuracy, split-prism illuminated levels accurate to 1 arc second (.00006 in./ft. or 0.005 mm/m).
  • Uses A-1519-2.4ZB Single-Axis, Wireless Targets – 1.2 in. (33 mm) PSD, .00002 in. (0.0005 mm) resolution.
  • Optional Ultra-Accuracy Target:  A-1520-2.4ZB Single-Axis, Wireless Targets – .39 in. (10 mm) PSD, .00001 in. (0.00025 mm) resolution.
  • Wireless targets provide real-time alignment data updating simultaneously.  
  • Align and monitor multiple axes simultaneously using up to 99 targets at the same time.
  • Initial setup typically takes 10-20 minutes or less.  
  • Short warm-up
  • Optional Windows Win7/8/10 software for quickly recording and analyzing machine geometry data
  • Battery or AC powered
  • Laser and targets fit into portable shipping case


Laser: 5.0 lbs. (2.3 kg)
Base: 4.8 lbs. (2.2 kg)
Battery Pack: 1 lbs (0.5 kg)
Laser: Aluminum and Stainless Steel
L-123 Base: Aluminum
Laser Type:
Visible diode, 635 nM wavelength Class II (Class I in scanning mode)
.160 in (4.06mm) beam diameter
Laser Power:
Laser Plane Flatness:
0.5 arc seconds (.00003 in./ft. or 0.0025 mm/m) in a 360º sweep
0.25 arc seconds (.000015 in./ft. or 0.0013 mm/m) in a 90º sweep
Laser Plane Step:
± .0001 in. (0.0025 mm) in a 360º sweep
± .00005 in. (0.0013 mm) in a 90º sweep
Operating Modes:
1 laser plane, rotating or stationary
Operating Range:
Laser plane has a 100-foot (30.5 meters) operating range in radius
Power Supply:
115/220V AC adapter
9V DC Battery Pack (2 Cells)
Optional LiPo Rechargeable Battery Pack
L-123 Base Adj. Range:
Coarse: ± 1.5º
Fine: ± 0.15º
L-123 Base Adj. Resolution:
Coarse: 1.7 arc sec (0.01 in./100 ft. or 0.250 mm/30m)
Fine: 0.17 arc sec (.001 in./100 ft. or 0.025 mm/30m)
Level Vials:
Illuminated and accurate to 3 arc seconds or .00018 in./ft. (0.015 mm/m)
Optional Hi-Accuracy Level Vials:
L-740 Split-Prism Upgrade: accurate to 1 arc second (.00006 in/ft. or 0.005 mm/m).