The Automatic Level - Topcon AT-B4A  is an optical surveying instrument used to measure differences in height across a site. Its 24× telescope provides a clear view of the levelling staff, while the automatic compensator keeps the line of sight horizontal after the instrument has been set up. With a stated levelling accuracy of 2.0 mm per 1 km double run and IPX6 water protection, it is suited to routine construction work, including setting out foundations, checking floor levels and establishing road or drainage gradients. Tripod and levelling staff included.

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