The Honeywell DuraStar shaftless linear potentiometer, originally from Data Instruments, is the longest-lasting factory-rugged linear pot available today. The rodless side-sealed DuraStar can be used to replace a rodded potentiometer in contaminated applications and has a longer service life than most pots due to reduced dither.
The DuraStar is available in lengths from 4″ to 50″ with a total resistance of 2000, 5000, or 10,000Ω depending on length (please refer to datasheet).
Linearity is 0.1%.