Re: Source Sealed Potentiometers?


Paul E. Bennett wrote:
John Mianowski wrote:

IP 67 is flush water, IP 68 is under water.
You want to measure an angle ?
What is the angular speed of the sensor ?

Rene
--
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net

I need to be able to survive immersed in fresh water for several
minutes. I think I might be able to get away with IP67.

I need to be able to measure an angle 0-360, & can't directly couple to
the shaft/axis of rotation. I can put a gear on the object to be
measured, & due to space constraints I need to reduce at least 5:1.

Angular speed would be slow, probably no more than about 30 RPM.

Is cost an issue or are you able to look at synchro/resolvers as a means to
measure the angle. There are some around that, due to their construction,
are OK for immersion. The solution is more expensive than a pot for
measuring angle but is quite dependable.


I'd like to keep the cost down, for sure. I haven't found any synchros
or resolvers that can deal with multiple turns, & I don't have a way to
tell which turn it might be on after power-up/reset. A multi-turn pot.
would work very nicely, but all I've been able to find that are
immersable are pretty pricey (i.e. oil-filled, $US80 & up).

JM

.

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