Optimal LVDT shaft material?

rhb · Oct 22, 2022

I just received a pair of new Trans-Tek 0216-00000 linear LVDTs with calibration certificates. These have a core threaded at both ends.

What's the best material to use for the actuator arms to get the best accuracy? I'd like to get millionth accuracy from these if that is possible. Calibration was at ~7 kHz. Will aluminum do or should I use a plastic shaft?

rhb · Oct 23, 2022

I found the datasheet and the OEM recommends non-magnetic stainless steel.

sfriedberg · Oct 23, 2022

Aluminum and brass are OK alternatives. I would prefer them over plastic on the basis of mechanical rigidity. But non-magnetic stainless rod (304, 316, etc) is not hard to find. I am told that cold-working can affect that property, so you should plan on demagnetizing parts made from drawn cold-finished rod. Won't have that issue with Al or CuZnTi.

fobyellow · Dec 24, 2022

the core material doent effect accuracy, it only effect sensitivity, the eddy current lose could produce heat which would result bad tc, you can try the LIGO open ducument about building a tiltmeter LIGO‐G1000989, they do have very good ideas

Search

Largest Manufacturing Technology Community on the Web

Search

Optimal LVDT shaft material?

rhb

Aluminum

rhb

Aluminum

sfriedberg

Diamond

fobyellow

Plastic

Similar threads