EASYSENSOR MOTION 3270
This motion sensor has a fast sampling rate and can continuously detect objects from as close as 170mm. This short distance is useful when using the motion sensor on an air track as the dead space is reduced. Detects distance to a resolution of 1mm and a maximum distance of 10m. Can be used remotely, and can be used in combination with other sensors e.g. it is possible to record both motion and force at the same time.