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    Topcon AT-B4

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    Durable, Dependable, High Value Auto Level

    Utilizing a finely tuned magnetic damping system, the AT-B4 automatic level is able to quickly level and stabilize the line of sight. This precise instrument ensures reliable levelling even when working near heavy equipment or busy highways where fine vibrations could be present. The automatic level features IPX6 protection against powerful water jets from all directions and is fully resistant to driving rain and splashing water.

    Horizontal angles can be directly read in 1º or 1gon units. Free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratch. The readout window is located below the eyepiece for quick reading.

    Features:

    • Durable, Dependable, High-Value Auto Levels
    • 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

    Rapid, Stable, and Durable Compensator:

    The compensator of the AT-B4 incorporates four suspension wires made of super-high-tensile metal that features minimal thermal expansion coefficient, providing unmatched durability and accuracy. 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.

    Horizontal Circle for Angle Measurement:

    Horizontal angles can be directly read in 1º or 1gon units. Free rotation feature allows you to read any angle from zero. The circle is covered for protection against dirt and scratch. The readout window is located below the eyepiece for quick reading.

    20cm (7.9 in.) - Ultra-Short Minimum Focus:

    The AT-B4 can focus on objects at 20cm (7.9 in.) in front of the telescope. This feature dramatically facilitates the works in confined spaces.

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    • Technical Specifications

    • Telescope Specifications for AT-B4

      • Length: 215mm (8.46 in.)
      • Magnification: 24X
      • Objective Aperture: 32mm (1.26 in.)
      • Resolving Power: 4 in.
      • Field of View: 1°25’ (2.5m/8.2 ft.)
      • Focus from telescope end: 0.2m (7.9 in.)
      • Focus from instrument: 0.3m (1 ft.)
      • Image: Erect
      • Stadia Constant: 0
      • Stadia Ratio: 100
      • Focusing Knob: 1-speed
      • Sighting Aid: Gun Sight

      Accuracy Specifications for AT-B4

      • Without Micrometer: 2.0mm (0.08 in.)
      • With Micrometer: n/a

      Compensator Specifications for AT-B4

      • Type: With magnetic damping system
      • Setting Accuracy: 0.5 in.
      • Working Range: ±15 ft.

      Circular Level Specifications for AT-B4

      • Sensitivity: 10 ft./2mm

      Horizontal Circle Specifications for AT-B4

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

      General Specifications for AT-B4

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