Topcon 24X Automatic Level (#AT-B4)
The new AT-B series sets a new standard for auto levels used in surveying, engineering and construction applications.
The AT-B series can focus on objects at 20cm (7.9in.) in front of the telescope, while previous models provided 50cm or 1m (1.6ft. or 3.3ft.) minimum focusing distance. This feature dramatically facilitates the works in confined spaces.
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 and with the advanced protection design not only prevents water penetration, but also deters clouding or condensation inside the telescope.
Package includes: Auto Level, Hard-Shell Carry Case, Plumb Bob, Weather Protective Bag, Lens cleaning cloth, Allen Wrench, and Operators Manual.
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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.
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.
Fine horizontal knobs located on both sides of instrument can be operated without clamping, speeding up aiming procedures to the staff and other objects.
Circular level can be viewed via integrated pentagonal prism (AT-B2) or plane mirror (AT-B3/B4) without changing your eye height.
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 value by 100.
| 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 (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.) | ||
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