Topcon AT-B4A 24X Automatic Optical Level

24 X Magnification Topcon offers a wide range of automatic levels for the land surveyor, civil engineer, and contractor. All AT-B series levels feature a magnetically-damped wire hung having superior resistance to cold, heat and shock. All AT-B series have a standard 360�� horizontal circle. All models are waterproof with nitrogen gas sealed telescope which prevents clouding and moisture on the lens. Waterproof - nitrogen gas filled Magnetically damped compensators Rapid automatic leveling Horizontal circles Clampless tangent screws on both sides Mirrored circular level Stadia crosshairsTopcon AT-B4A 24X Automatic Optical Level