  For mobile robots range sensors are important to perceive the environment.
Sensors that can measure in a 3D volume are especially significant for outdoor
robotics, because this environment is often highly unstructured. The quality of
the data gathered by those sensors influences all algorithms relying on it. In
this paper thus the precision of several 2D and 2.5D sensors is measured at
different ranges and different incidence angles. The results of all tests are
presented and analyzed.
