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.
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| High-precision model |
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| Versatile model for surveying, engineering and construction |
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| Economical model for engineering and construction |
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| Rapid, Stable and Durable Compensator | |
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| 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. |
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| 2 Speed Focus (AT-B2) Rotation speed of the focusing knob is automatically switched between coarse and fine, allowing for quick and precise focusing. |
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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. |
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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. |
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| 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. |
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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. |
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| 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. |
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| 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. |
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| 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. |
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| 40x Eyepiece EL5 (AT-B2) Increases magnification of AT-B2 to 40x. Replaces standard eyepiece. |
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Standard Package
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The Topcon AT-B Series Specifications
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AT-B2 |
AT-B3 |
AT-B4 |
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Telescope |
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Length |
215mm (8.46 in.) |
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Magnification |
32X |
28X |
24X |
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Objective Aperture |
42mm (1.65 in.) |
36mm (1.42 in.) |
32mm (1.26 in.) |
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Resolving Power |
3" |
3.5" |
4" |
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Field of View |
1ﾟ20' |
1ﾟ25' |
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Minimum Focus |
0.2m (7.9 in.) from end of telescope |
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Image |
Erect |
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Stadia Constant |
0 |
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Stadia Ratio |
100 |
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Accuracy (1km double run leveling) |
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Without Micrometer |
0.7mm (0.03 in.) |
1.5mm (0.06 in.) |
2.0mm (0.08 in.) |
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With Micrometer |
0.5mm (0.02 in.) |
n/a |
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Compensator |
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Type |
Pendulum compensator with magnetic damping system |
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Setting Accuracy |
0.3" |
0.5" |
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Working Range |
±15' |
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Circular level |
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Sensitivity |
10' / 2mm |
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Horizontal circle |
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Diameter |
103mm (4.1 in.) |
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Minimum Division |
1ﾟ/ 1gon |
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General |
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Water Resistance |
IPX6 (IEC 60529:2001) |
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Operating Temperature |
-20℃ to +50℃ (-4ﾟF to +122ﾟF) |
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Size |
Width |
130mm (5.12 in.) |
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Length |
215mm (8.46 in.) |
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Height |
140mm (5.51 in.) |
135mm (5.31 in.) |
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Weight |
1.85kg (4.1 lbs.) |
1.7kg (3.7 lbs.) |
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