Ultra high repeat accuracy inductive sensor?

[RENeng]

Hi all.

First post on the forum so be overbearing with me if I am violating good conduct, but I have really run aground in a project.

I am currently involved in the ungrateful task of building a "low cost" torque transducer and in connection with that, I need to find a proximity sensor (preferable inductive) that has ultra high repeatability accuracy. ideally less than 1μm, at a cheap cost (the sub 100Euro range) Switching frequency is not so important (less than 100Hz)

I am looking around at places like OMRON and Pebbler and Fuchs an the likes, but unfortunately they seldom advocate repeatability accuracy on their "cheap" sensor range (and probably for a good reason)

If you have any good leads, please help me by pointing me in the right direction.

Best regards
Rasmus

 

[MikeHalloran]

Just for giggles, is there a temperature range over which this extreme precision is required?


Mike Halloran
Pembroke Pines, FL, USA

 

[IRstuff]

In the worst case, the repeatability is the accuracy.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[RENeng]

the relevant temperature is in the 0 to 50 degree Celcius bracket.
Hopefully (subject to investigation on precise setup) i can live with the temperature variations within my accuracy requirement.

I am not trying to build an absolute reference torque transducer, so the accuracy may drift (to a limit) as i plan to run a "zero calibration" periodically during use.