# What's the proper name for “annular potentiometer”?

I'm looking for a potentiometer without the shaft. It should be like a ring, in annular shape, so it can be mounted on an existing shaft.

I don't find anything, but I'm afraid I'm not using the proper English word to describe such a component.

• i have seen the layers referred to as wafer and element ... but no idea about the name of an assembly that you add to an existing potentiometer – jsotola Nov 30 '17 at 17:35
• Not to an existing potentiometer, but to an existing shaft, i.e. of a motor – Mark Nov 30 '17 at 19:53
• rotary position sensor ...... something like this vishay.com/sensors/list/product-54003 and this murata.com/en-us/products/sensor/rotaryposition/sv01 – jsotola Dec 1 '17 at 1:26