Topcon AT-B3 28x Automatic Level - 2110230B0

AT-B3 – Auto Level
    Utilizing   a finely tuned magnetic damping system, AT-B automatic levels quickly   level and stabilize the line of sight. These precision instruments   ensure reliable leveling even when working near heavy equipment or busy   highways where fine vibrations could be present. The automatic levels   feature IPX6 protection against powerful water jets from all directions   and are 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.
    AT-B3 Features:
    
      •    Durable, Dependable, High Value Auto Levels2110230
      •    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 AT-B Series 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-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.
    
    TELESCOPE        AT-B3     
    Length         215mm (8.46 in.)     
    Magnification         28X     
    Objective Aperture         36mm (1.42 in.)     
    Resolving Power         3.5 in.     
    Field of View         1°25’     
    (at 100m/328ft.)         (2.5m/8.2 ft.)     
    Min. Focus from end of telescope         0.2m (7.9 in.)     
    Min. Focus from instrument center         0.3m (1 ft.)     
    Image         Erect     
    Stadia Constant         0     
    Stadia Ratio         100     
    Focusing Knob         1-speed     
    Sighting Aid         Gun Sight     
    ACCURACY         AT-B3     
    Without Micrometer         1.5mm (0.06 in.)     
    With Micrometer         n/a     
    COMPENSATOR         AT-B3     
    Type    Pendulum compensator with magnetic damping system    
    Setting Accuracy         0.5 in.     
    Working Range         ±15ft.     
    CIRCULAR LEVEL         AT-B3     
    Sensitivity         10 ft./2mm     
    HORIZONTAL CIRCLE    AT-B4
    Diameter         103mm (4.1 in.)
    Minimum Division         1°/1gon
    GENERAL         AT-B3     
    Water Resistance    IPX6 (IEC 60529:2001)    
    Operating Temperature  -4°F to +122°F (-20ºC to +50ºC)    
    Width         5.12 in. (130mm)     
    Length         8.46 in. (215mm)     
    Height         5.51 in. (140mm)     
    Weight         3.7 lbs. (1.7kg)