Topcon Dumpy Level Set

The B4 is equipped with a fast-action,magnetically-damped, automatic compensator. Afterthe instrument has been approximately leveled usingthe circular level, the line of sight is accurately leveledby the automatic compensating mechanism.The AT-B4 has been designed to allow stablesurveying operations regardless of environmentalconditions such as vibration and temperature changes.The AT-B4 has a simple horizontal circle forangle measurement, and the stadia lines on the reticlecan be used for approximate distance measurement.The AT-B4 is ideally suited for general surveywork, civil engineering and construction work