Displacement measurement

Displacement measurement is the measurement of changes in directed distance (displacement). Devices measuring displacement are based on displacement sensors, which can be contacting or non-contacting. Some displacement sensors are based on displacement transducers, devices which convert displacement into another form of energy.

Displacement sensors can be used to indirectly measure a number of other quantities, including deformation, distortion, thermal expansion, thickness (normally through the combination of two sensors), vibration, spindle motion, fluid level, strain and mechanical shock.

Displacement sensors exist that can measure displacement on the order of nanometers or smaller.

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