• About this item.
• 7.9-inch minimum focusing distancek, 1/16 inch accuracy.
• 0.5 arc-second compensator accuracy.
• One-speed focusing knob.
• 360 degrees/400 gons horizontal circle.
• IPX6 water resistant, 5/8-11 tripod thread, 5-year warranty.
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The Topcon AT B4 Automatic Level enables surveyors, builders and civil engineers to take highly accurate horizontal plane and angle measurements. It features 24x magnification and superior tele design that provides clear and bright view. With 1/16 inch accuracy and a built-in compensator, this optical instrument ensures precise leveling even when working near heavy equipment or busy highways. For working in confined spaces, the AT-B4 has a focusing range of 7.9 inches in front of the tele, making it ideal for landscaping, fence building, pipe laying and more. With a magnetic dampened compensator, this survey and construction tool levels the line of site within the range of ±15 arc-minutes and an accuracy of 0.5 arc-second. This auto level allows you to use an optional diagonal eyepiece to facilitate work in extremely narrow areas. The fine horizontal knobs located on both sides of this Topcon auto level can be operated without clamping, speeding up ing procedures to the staff and other objects. In addition to height and angle, distance to the staff can also be measured by simply reading the length of staff between two stadia lines and multiplying the value by 100. Horizontal angles can be directly read in degrees or gons with the readout window just located below the eyepiece. The horizontal circle is protected against dirt and scratch and features free rotation that enables you to read any angle from zero. Also allows you to easily view the circular level through its integrated plane mirror without changing your eye height. The AT-B4 features IPX6 protection against powerful water jets from all directions and can withstand a sudden shower or pouring rain. This advanced protection design not only prevents water from entering the instrument, but also deters clouding or condensation inside the tele. This Topcon automatic level comes with a hard carrying case, plumb bob, hex wrench, adjusting pins, vinyl cover, cleaning cloth, lens cap.