In analog applications, Resolution and Linearity are two specifications used to describe sensors.
But not all specifications are equal indicators of real-world performance; let's break it down.
The resolution of a sensor tells you the smallest change in distance that the sensor can detect.
Resolution represents the best-case condition; but resolution can be impacted by target conditions, distance to the target, sensor response speed, and other factors.
For that reason it is not the best indicator of real-world preformance.
Linearity is the maximum deviation between an ideal straight-line measurement and the actual measurement.
It indicates how closely a sensor’s analog output can approximate a straight line when measuring across the sensor’s range. The more consistent the measurements are, the more linear the sensor.