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Topcon AT-B4A Automatic Level

Topcon AT-B4A Automatic Level

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Topcon offers a wide range of automatic levels for the land surveyor, civil engineer and contractor. Topcon AT-B4A Automatic Levels feature a magnetically-damped wire hung having superior resistance to cold, heat and shock. All AT-B series have a standard 360° horizontal circle.
All models are waterproof with nitrogen gas sealed telescope which prevents clouding and moisture on the lens.

  • Waterproof – nitrogen gas filled
  • Magnetically damped compensators
  • Rapid automatic leveling
  • Horizontal circles
  • Clampless tangent screws on both sides
  • Mirrored circular level
  • Stadia cross hairs
Magnification 24X
Accuracy 1km DR Level 2.0 mm
Objective Lens 32mm
Relative Brightness


Field of View 85 Minutes
Minimum Focus

.3 Meter

Resolving Power 4.0′
Stadia Ratio

1 : 100

Compensating Range

+/- 15 minutes

Circular Level 10 minutes
Hz Circle Min Reading

1 degree


3.7 lbs