633665 Silverline self levelling automatic optical level works like a precision telescope and allows an artificial target line, the horizontal reference to be created at a certain height, the height different between various measuring points and the horizontal reference line can be read off using a levelling staff
The self levelling function automatically aligns the traget line by itself, guaranteeing maximum measuring accuracy in all conditions, magnification x 20, image erect, accurate to +/- 2.5mm over 1km distance, field of view 1 degree in 20", objective aperture 34mm, minimum focus 0.5m, 360 degree circle, compensator range +/- 0.8", complete kit includes automatic optical level, plumb bob, adjustment tools, full instructions and custom carrying case