Shanghai Magcach Technology Co.Ltd
Shanghai Magcach Technology Co.,Ltd We Sincerely welcome the worldwide distributors to cooperate with us.
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Topcon Auto Level AT-B4A new model :
Economical model for engineering and construction
AT-Bseries SPECIFICATIONS
| AT-Bseries SPECIFICATIONS | AT-B2 | AT-B3A | AT-B4B | |||||||
| 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 (at 100m/328ft.) | 1°20′ (2.3m / 7.5ft.) | 1°25′ (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 | ||||||||
| 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.) | ||||||||