On 06/22/2011 12:07 PM, ED wrote:
> I read that I can determine the moisture content of the brake fluid in my
> car
> by using a DMM (digital multimeter). Negative lead to the -battery term
> and the positive lead to the brake fluid in the reservoir. Anything
> below .3 volts is acceptable.
> Any comments on the validity of this method?
>
>

in theory it could work, but it depends on the electrode metal and the
type of metal the cylinder is made of. cast iron has a different
electrode potential to aluminum, which has a different potential to
stainless, which has a different potential to chrome plated brass, which
has a different potential to only partially chrome plated brass, etc.
so, unless you know the potentials for your probes and your system
respectively, or you use a specific known probe calibrated for the
system you're testing, you're completely in the dark.


--
nomina rutrum rutrum