Topcon 24X Automatic Level (#AT-B4) - Survey Supply

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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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Manufacturer Part Number: AT-B4
Stock # AT-B4
Price: $279.95
Compare At: $345.00
Quantity:
Topcon 24X Automatic Level (#AT-B4)
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Topcon 24X Automatic Level #AT-B4

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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