What units are used to measure displacement?

Displacement in vibration analysis is often measured in terms of the peak-to-peak value, which is an important aspect when assessing the motion of a vibrating system. The phrase "mils pk-pk" refers to the measurement in thousandths of an inch (mils) from the maximum peak of the vibration to the minimum peak, while "microns pk-pk" indicates measurements in micrometers. These specific units are particularly relevant for characterizing small displacements which are commonly encountered in precision measurement applications such as vibration analysis.

Using these units, engineers can easily interpret and compare the magnitude of displacement in sensitive equipment or components. Meters, inches, and feet are all valid measurements; however, they do not convey the specificity needed in vibration analysis, especially when precise thresholds for vibration limits are established. Therefore, the use of mils pk-pk and microns pk-pk is especially suitable for assessing the minute displacements characteristic of many mechanical systems.