To Calculate:
Required sensor sample period (SP)

Given:
CS = conveyor speed in inches per second RP = recommended sample pitch (distance resolution) in inches

Formula:
RP / CS = SP seconds

Example:
CS = 100 inches/sec. RP = 0.25 inches

Calculation:
0.25 / 100 = 0.0025 sec. (or 2.5ms)