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- From: neal@cmptrc.lonestar.org (Neal Howard)
- Newsgroups: sci.electronics
- Subject: Re: looking for non-conducting, low viscosity, teflon compatible fluid...
- Message-ID: <BxIsI0.1zs@cmptrc.lonestar.org>
- Date: 10 Nov 92 21:46:48 GMT
- Sender: neal@cmptrc.lonestar.org
- Organization: CompuTrac Inc., Richardson TX
- Lines: 30
-
- In article <1992Nov10.143513.14412@athena.mit.edu> jory@athena.mit.edu (Jory Bell) writes:
- >as usual, i have a slightly weird interdisciplinary
- >question...
- >
- >in a nut shell, i am looking for a non-conductive, low
- >viscosity, teflon-compatible fluid which i can put in an
- >oceanographic instrument with some electronics (IC's,
- >motor, and batteries) as a pressure compensating fluid!
- >
- >some net folk may be familiar with fluorinert (FC-77), a 3M
- >chemical used for electronics testing (heat cycles,
- >etc?)... well i have been using this as a pressure
- >compensating fluid, but it is "incompatible" with teflon
- >(it makes it expan from 3%-7%), and it is keeping me from
- >using a certain teflon shaft seal that i have me heart set
- >on...
- >
- How about DOT-5 automotive brake fluid??? It's pretty low viscosity over a
- wide range of temperatures and doesn't harm teflon parts inside brake systems.
- Since it's silicone based, I doubt that it has any substantial amount of
- electrical conductance either. It's also non-hydroscopic and reportedly will
- not dissolve paint like the glycol based brake fluids. It's probably also got
- some semi-decent lubricating properties for your electric motor too.
-
- --
- =============================================================================
- Neal Howard '91 XLH-1200 DoD #686 CompuTrac, Inc (Richardson, TX)
- "To do is to be." - Socrates "To be is to do." - Aristotle
- "Doo bee doo bee doo." - Sinatra
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