Topcon AT-B3A 28x Automatic Level — My Surveying Direct
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    Topcon AT-B3A 28x Automatic Level

    by Topcon
    In Stock & Ready To Ship
    Original price $720.00 - Original price $720.00
    Original price
    $720.00
    $720.00 - $720.00
    Current price $720.00

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    The Topcon AT-B3A Automatic Level is for surveyors, builders, and civil engineers demanding precision and stability in their leveling and angle measurements. Featuring a 28x magnification and an accuracy of 1/16 inch, the AT-B3A is designed to deliver performance in a variety of outdoor construction and surveying tasks, including landscaping, fence building, pipe laying, and roadwork.

    At the core of the AT-B3A's performance is its compensator, which utilizes four suspension wires made from high-tensile metal with a minimal thermal expansion coefficient. This leads to durability and accuracy, even under the challenging environmental conditions. The magnetic damping system levels and stabilizes the line of sight, counteracting the minor vibrations common near heavy machinery or busy roads.

    Key Features

    Focus Range for Versatile Use: The AT-B3A has a short focusing range of 7.9 inches, allowing for efficient operation in restricted areas. Its durable, magnetic dampened compensator provides leveling of the line of sight within ±15 arc-minutes, with an accuracy of 0.5 arc-second.

    Fine Horizontal Adjustments for Precision: The fine horizontal knobs on both sides enable clamp-free operation, aiding the aiming process toward targets. It also facilitates distance measurements to the staff by utilizing the stadia method, providing added versatility in the field.

    Durable and Water Resistant Construction: The AT-B3A has IPX6 protection. The device remains operational in the rain and prevents internal condensation, maintaining clear visibility through the telescope.

    Whats Included: The Topcon AT-B3A comes equipped with everything needed to get started right away, including a hard carrying case, plumb bob, hex wrench, adjusting pins, vinyl cover, cleaning cloth, lens cap, and a 5-year manufacturer’s warranty.

    Specifications

    Telescope

    • Length: 215mm (8.46in)
    • Magnification: 28x
    • Objective Aperture: 36mm (1.42in)
    • Resolving Power: 3.5"
    • Field of View (at 100m/328ft.): 1°25' (2.5m/8.2ft)
    • Minimum Focus:
      • 0.2m (7.9in) 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: 1.5mm (0.06in)
    • With Micrometer: N/A

    Compensator

    • Type: Pendulum compensator with magnetic damping system
    • Setting Accuracy: 0.5"
    • Working Range: ±15'

    Circular Level

    • Sensitivity: 10'/2mm

    Horizontal Circle

    • Diameter: 103mm (4.1in)
    • Minimum Division: 1/1gon

    General

    • Water Resistance: IPX6 (IEC 60529:2001)
    • Operating Temperature: -20 to +50 (-4F to +122F)
    • Size:
      • Width: 130mm (5.12in)
      • Length: 215mm (8.46in)
      • Height: 135mm (5.31in)
    • Weight: 1.7kg (3.7lbs)

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