Shanghai Hengyide Electronic Technology Co.,Ltd Ltd.
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Topcon AT-B Series Auto Level :
· 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-B series SPECIFICATIONS
| AT-Bseries SPECIFICATIONS | AT-B2 | AT-B3 | AT-B4 | |
| Telescope | ||||
| 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 | 1°20′ | 1°25′ | ||
| Minimum Focus | 0.2m (7.9 in.) from end of telescope | |||
| 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 | ||
| Compensator | ||||
| 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°/ 1gon | |||
| General | ||||
| Water Resistance | IPX6 (IEC 60529:2001) | |||
| Operating Temperature | -20℃ to +50℃ (-4°F to +122°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.) | ||