Topcon AT-B3

An auto level is an optical instrument used to measure height differences and to transfer, measure, and set heights of known objects or marks.

It operates on the principle of establishing a visual level relationship between two or more points, for which an inbuilt telescope and a highly accurate bubble level are used to achieve the necessary accuracy.

The compensator of AT-B series incorporates four suspension wires made of extremely high-tensile metal that features minimal thermal expansion coefficient, providing unmatched durability and accuracy even in the harshest environmental condition. A finely tuned magnetic damping system quickly levels and stabilizes the line of sight despite the fine vibrations present when working near heavy equipment or busy roadways.

The AT-B series can focus on objects at 20cm (7.9in.) in front of the telescope, while previous models provided 50cm or 1m (1.6ft. or 3.3ft.) minimum focusing distance. This feature dramatically facilitates the works in confined spaces.

With an IPx6 rating, the instrument is protected against powerful water jets from all directions, meaning the AT-B series withstands a sudden shower or torrential rainfall.  The advanced protection design not only prevents water penetration, but also deters clouding or condensation inside the telescope.

For marine survey field, an auto level instrument plays an important role in measuring tide, help forward height from base point to water surface. Hence, we can know height of water level at different times to correct for variations water depth.