[Gmecm] ethanol

[Tom Prucha]

It seems there are both optical and capacitive fuel composition sensors:

http://www.instant-analysis.com/Patents/SBD_Article.htm

http://www.exalondelft.nl/download/CapacitiveSensors.PDF

Kelly Parker wrote:

>
>> E85 is also not very well regulated for content.  It is usually 
>> somewhere between 70 and 85% Ethanol.  The rest is gasoline and up to 
>> 1% water.  This makes it difficult to calibrate without an alcohol 
>> content sensor, such as the new FFV's have, even when a permanent 
>> switch from gasoline to E85 is performed.
>
>
> I'm curious because I have plans to make my own alcohol. I've looked 
> into it pretty extensively.
> Getting a permit to do it is free (for small scale) and fairly simple 
> especially if you live on a farm. :-)
> So I would be very "in tune" with the quality of the fuel.
>
> How 'bout this alcohol content sensor?
> I've never heard of them.
> Got any inside info on them? (I mean literally inside....how they work)
> perhaps some sort of electronic specific gravity meter??????
>
>
> Kelly
>
>
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