Automatic Level Topcon AT-B4

Automatic Level Topcon AT-B4 Thanks to the finely tuned auto-collimation system, the Topcon line of AT-B auto-levels are the ideal device for determining height differentials on busy and noisy job sites. AT-B4 Features: • Durable, Dependable, High Value Auto Levels • Rapid, Accurate, and Stable Automatic Compensation • Ultra-Short 20cm ( 7.9 in.) Focusing • All-Weather Dependability • Clampless, Endless Fine Horizontal Adjustments AT-B4 Specifications: TELESCOPE • Length: 215mm ( 8.46 in.) • Magnification: 24X • Objective Aperture: 32mm ( 1.26 in.) • Resolving Power: 4 in. • Field of View: 1° 25’ ( at 100m/ 328ft.) , ( 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 • Without Micrometer: 2.0mm ( 0.08 in.) • With Micrometer: n/ a COMPENSATOR • Type: Pendulum compensator with magnetic damping system • Setting Accuracy: 0.5 in. • Working Range: ± 15 ft. CIRCULAR LEVEL • Sensitivity: 10 ft./ 2mm HORIZONTAL CIRCLE • Diameter: 103mm ( 4.1 in.) • Minimum Division: 1° / 1gon GENERAL • Water Resistance: IPX6 ( IEC 60529: 2001) • Operating Temperature: -4° F to + 122° F ( -20º C to + 50º C) • Width: 5.12 in. ( 130mm) • Length: 8.46 in. ( 215mm) • Height: 5.31 in. ( 135mm) • Weight: 3.7 lbs. ( 1.7kg)