Topcon Waterpas AT-B4
- 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
AT-Bseries 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°20′ |
1°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°/ 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°F to +122°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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Standard Package
- AT-B Level
- Plumb bob
- Hex wrench
- Adjusting pins
- Vinyl cover
- Cleaning cloth
- Lens cap
- User manual
- Hard carrying case