Leonardo Marsaglia wrote: > Hello Andy. > > That's really good news, if one can use a DIY LVDT that would reduce the > cost drastically. > > I've only seen low travel LVDTs intended to be used in diameter measuring > and things like that. Do you think a 1000 mm LVDT is possible to accomplish > without great issues?. > Huh? one METER long LVDT? Sure, you could build such a device, but the resolution would be a bit better than a mm assuming the magnetics were perfect. Why would you try to do this? generally, you can expect to get one part per thousand easily in analog electronics, 1 part in 10,000 with substantial difficulty, and anything beyond that is getting into the area of insanity. Linear scales of a variety of techniques are available for modest sums, with resolution inversely proportional to price. With these, vastly greater resolution is much more easily obtained, and linearity is assured by the manufacturing process.
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