There are different ways to measure diameter.

If the diameter is small enough, it can be covered by one laser micrometer. For big diameters, two laser micrometers can be combined. The diameter is calculated by adding the distance between the sensor measurement fields and the two measurement values.

If still larger diameters have to be measured, triangulation sensors may be used. The laser beam has to be adjusted to point perpendicular on the turning axis of the object.


For measurement of ovality, at least two measurement axes are needed.

In standard applications, an evaluation unit or a PC calculates the cross-section from two sensors, arranged in an angle of 90°.

LAP offers systems with up to 6 measurement axes to measure even complicated geometries.