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Johnson Level & Tool Mfg. Products

Self-Leveling 3-Dot Laser Level


>> Dot Laser Level Guide   >> Dot Laser Applications

Carpenters, Electricians & Plumbers use this 3 beam laser level for accurate placement of Fixtures, Framing, Piping & Conduit Runs, Electrical Boxes, Fencing & More.Johnson Self-Leveling 3-Dot Laser Level 40-6646

The 40-6646 Laser Level Simultaneously projects 3 Beams and is Job Site Tough!

3-Dot lasers are the most common dot laser, and for good reason.

In most framing applications, these lasers can replace levels and plumb bobs, and are great for plumbing walls, checking floor level, transferring reference points from floor to ceiling, and leveling posts and beams, and setting drainage slopes. 

It is Dust Resistant and a Locking Mechanism protects the Pendulum during transportation

Electricians use this laser level for accurate placement of  lighting fixtures. Carpenters use this Laser Lever for layout of interior walls and beams.

Applications include: Layout and Installation of: Fixtures, Plumbing, Door Frames, Dormers, Electrical Switch & Outlet Boxes, Conduit Runs, Framing, Fencing & Misc. Carpentry Work (ie Chair Rail.. etc.)

A big time saver on sloped ceilings!!


  • Self-leveling laser
  • Simultaneously projects three self-leveling beams
  • Tall profile for clearance of wood or metal drywall track
  • Accuracy: +/-1/8"/30ft.
  • Locking mechanism protects inner pendulum during transportation
  • Visual out-of-level indicator 
  • 1/4"-20 tripod thread for use with most common tripods
  • Dust Resistant
  • Includes: 3-Beam Laser Level, 2 AA Batteries
  • 2 Year Warranty

 Self-Leveling 3-Dot Laser Level 


Number of Beams


Leveling Method

Self-Leveling (Pendulum)

Laser Wavelength

650nm +/-10nm (Red)

Laser Classification

Class II

Maximum Power Output




Interior Range

Up to 100ft. (30m) depending on light conditions

Self-Leveling Range

+/-5 degrees

Power Supply

2 "AA" alkaline batteries (included)

Battery Life

Approximately 20 hours with alkaline batteries


3.6" x 2.6" x 4.5"


9.9 oz (without Batteries)

Working Temperature

32F to 104F

Center Screw Thread


IP Protection Class



2 Years


Johnson laser levels, spirit levels, construction measuring and marking tools - JobSite Tough Since 1947

Tools for Electricians


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