The New Topcon AT-B Series

Topcon AT-B

The New Topcon AT-B Series.

Topcon have released the new AT-B Series of Automatic Levels. There are three models in the range, the AT-B2 the high precision, the AT-B3 the versitile model and the AT-B4, the cost effective model.


 AT-B Series
 Topcon AT-B Series of Levels
  • 3 Models – 32x, 28x, and 24x Magnifications
  • Rapid, Accurate, and Stable Automatic Compensation
  • Ultra-Short 20cm (7.9 in.) Focusing
  • All-Weather Dependability
  • Clampless, Endless Fine Horizontal Adjustments


 ATB 03
High-precision model
 ATB 04
 ATB 05
Versatile model for surveying, engineering and construction
 ATB 06
 ATB 07
Economical model for engineering and construction
 ATB 08


 Topcon AT-B


Rapid, Stable and Durable Compensator
 ATB 09
The compensator of AT-B series incorporates four suspension wires made of super-high-tensile metal that features minimal thermal expansion coefficient, providing unmatched durability and accuracy even in the harshest environmental conditions. Finely tuned magnetic damping system quickly levels and stabilizes the line of sight despite the fine vibrations present when working near heavy equipment or busy roadways.
Ultra-Short Focusing Range.
The AT-B series can focus on objects at 20cm (7.9 in.) in front of the telescope. This feature dramatically facilitates the works in confined spaces.
2 Speed Focus (AT-B2)
Rotation speed of the focusing knob is automatically switched between coarse and fine, allowing for quick and precise focusing.
 ATB 10
Clampless, Endless Fine Horizontal Adjustments.

Fine horizontal knobs located on both sides of instrument can be operated without clamping, speeding up aiming procedures to the staff and other objects.

 ATB 11
Easy to See Circular Level.

Circular level can be viewed via integrated pentagonal prism (AT-B2) or plane mirror (AT-B3/B4) without changing your eye height.

 ATB 12
Horizontal Circle for Angle Measurement.
Horizontal angles can be directly read in 1゚ or 1gon units. Free rotation feature of the horizontal circle allows you to read any angle from zero. The circle is covered for protection against dirt and scratch. The readout window is located below the eyepiece for quick reading.
 ATB 13
All Weather Dependability.

With the IPx6 rating, the instrument is protected against powerful water jets from all directions, meaning the AT-B series withstands a sudden shower or torrential rainfall. The advanced protection design not only prevents water penetration, but also deters clouding or condensation inside the telescope.

Distance, Angle, and Height Measurement.
In addition to height and angle, distance to the staff can be simultaneously measured using stadia lines. This is accomplished by reading the length of staff between two stadia lines and multiplying the stadia ratio of 100.
 ATB 14
AT-B Series Accessories
Diagonal Eyepiece
DE16 (AT-B2) / DE22 (AT-B3/B4)
Facilitates your works when the level is set at low height or in confined spaces.
 ATB 15
Optical Micrometer OM5(F) (AT-B2)
Addition of the optical micrometer to the AT-B2 allows for 0.1mm (OM5) or 0.001ft. (OM5F) reading of staffs and improves accuracy to 0.5mm for 1km double run leveling. This combination is ideal for precise leveling.
 ATB 16
40x Eyepiece EL5 (AT-B2)
Increases magnification of AT-B2 to 40x. Replaces standard eyepiece.
 ATB 17
Standard Package
AT-B Level

  • Plumb bob
  • Hex wrench
  • Adjusting pins
  • Vinyl cover
  • Cleaning cloth
  • Lens cap
  • User manual
  • Hard carrying case


 ATB 18

The Topcon AT-B Series Specifications

Length 215mm (8.46 in.)
Magnification 32X 28X 24X
Objective Aperture 42mm (1.65 in.) 36mm (1.42 in.) 32mm (1.26 in.)
Resolving Power 3″ 3.5″ 4″
Field of View
(at 100m/328ft.)
(2.3m / 7.5ft.)
(2.5m / 8.2ft.)
Minimum Focus 0.2m (7.9 in.) from end of telescope
0.3m (1ft.) from instrument center
Image Erect
Stadia Constant 0
Stadia Ratio 100
Accuracy (1km double run leveling)
Without Micrometer 0.7mm (0.03 in.) 1.5mm (0.06 in.) 2.0mm (0.08 in.)
With Micrometer 0.5mm (0.02 in.) n/a
Type Pendulum compensator with magnetic damping system
Setting Accuracy 0.3″ 0.5″
Working Range ±15′
Circular level
Sensitivity 10′ / 2mm
Horizontal circle
Diameter 103mm (4.1 in.)
Minimum Division 1゚/ 1gon
Water Resistance IPX6 (IEC 60529:2001)
Operating Temperature -20℃ to +50℃ (-4゚F to +122゚F)
Size Width 130mm (5.12 in.)
Length 215mm (8.46 in.)
Height 140mm (5.51 in.) 135mm (5.31 in.)
Weight 1.85kg (4.1 lbs.) 1.7kg (3.7 lbs.)