Sokkia B30 Waterpass
Deskripsi : B20 B30 B40 Automatic Levels Model   B20 B30 B40 Telescope magnification 32x 28x 24x Objective aperture 42mm (1.7in.)  36mm (1.4in.)  32mm (1.3in.) Minimum focus 0.2m (7.9in.) from end of telescope, 0.3m (1.0ft.) from instrument center Accuracy* Without micrometer 0.7mm (0.03in.)  1.5mm (0.06in.) 2.0mm (0.08in.) With micrometer 0.5mm (0.02in.) - Compensator Type 4 wire pendulum compensator with magnetic damping system Working range  ±15' Water protection   IPX6 (IEC60529) Horizontal circle graduation   1º (1gon) Weight   1.85kg (4.1lb.) 1.7kg (3.7lb.) * Standard deviation for 1km double-run leveling....detail