The compensator of AT-B Series incorporates four suspension wires made of super-high-tensile metal, which features minimal thermal expansion coefficient – providing unmatched durability and accuracy.
Horizontal circle for measurement
Horizontal angles can be directly read in 1° or 1 gon units. The free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratches and the readout window is located below the eyepiece for quick reference.
Topcon have two new, updated auto levels to replace the AT-B3 and AT-B4! The levels have been updated to feature a smaller, lightweight design while still improving the performance of the unit.
New Features:
Completely NEW design, same compensator from AT-B2 series, lightweight at 1.5 kg m(3.3lb) A 13% reduction from previous version, easy to grasp (compact body), better visibility of horizontal circle, improved tangents/knobs, increased gear ratio for shock and vibration.
The Topcon AT-B Series Dumpy Levels are available in 3 Models – 24x, 28x, and 32x Magnification.
The AT-B Series of precision instruments utilise a finely tuned magnetic dampening system to provide unmatched durability and accuracy. Essential reliability when working near heavy equipment or busy highways, or where fine vibrations may be present.
Suitable for: Site preparation, earthworks, concreting, drainage and site set-out
| Features: | Kit Includes: |
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| SPECIFICATIONS: | AT-B2 | AT-B3 | AT-B4 |
| Length | 215 mm | 214 mm | 214 mm |
| Magnification | 32 x | 28 x | 24 x |
| Objective Aperture | 42 mm | 36 mm | 32 mm |
| Resolving power | 3 in. | 3.5 in. | 4 in. |
| Field of view (at 100 m) |
1°20′ 2.3 m |
1°25′ 2.5 m |
1°25′ 2.5 m |
| Focussing Knob | 2-speed | 1-speed | 1-speed |
| Sighting aid | Peep sight | Gun sight | Gun sight |
| Accuracy (w/out micrometre) |
0.7 mm | 1.5 mm | |
| Accuracy (w/ micrometre) |
0.5 mm | n/a | n/a |
| Circular level sensitivity | 2 mm | 2 mm | 2 mm |
| Horizontal Circle diameter | 103 mm | 103 mm | 103 mm |
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