Automatic Level Topcon AT-B3

AT-Bseries SPECIFICATIONS AT-B2 AT-B3 AT-B4 Telescope Length 215mm ( 8.46 in.) Magnification 32X 28X 24X Objective Aperture 42mm ( 1.65 in.) 36mm ( 1.42 in.) 32mm ( 1.26 in.) Resolving Power 33 3.53 43 Field of View ( at 100m/ 328ft.) 1 202 ( 2.3m / 7.5ft.) 1 252 ( 2.5m / 8.2ft.) Minimum Focus 0.2m ( 7.9 in.) 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 0.7mm ( 0.03 in.) 1.5mm ( 0.06 in.) 2.0mm ( 0.08 in.) With Micrometer 0.5mm ( 0.02 in.) n/ a Compensator Type Pendulum compensator with magnetic damping system Setting Accuracy 0.33 0.53 Working Range 152 Circular level Sensitivity 102 / 2mm Horizontal circle Diameter 103mm ( 4.1 in.) Minimum Division 1 / 1gon General Water Resistance IPX6 ( IEC 60529: 2001) Operating Temperature -20 to + 50 ( -4 F to + 122 F) Size Width 130mm ( 5.12 in.) Length 215mm ( 8.46 in.) Height 140mm ( 5.51 in.) 135mm ( 5.31 in.) Weight 1.85kg ( 4.1 lbs.) 1.7kg ( 3.7 lbs.)
total station