A very difficult question.  Optical sensors become obscured by dust.
 Weight and sonar response vary between materials.  Not all items conduct...

So tell us what other constraints there might be (ie, must fit in handle
and be able to be used like a regular measuring cup, or can be fixed in
position (or placed in position to be measured), etc), and what the
accuracy and precision are expected to be...

-Adam

Harold Hallikainen wrote:

>     Anyone have ideas on detecting the level of a fluid or solid in a kitchen measuring cup? I can't rely on weight because of varying density of the material. It seems like some sort of optical array would be required. Any great ideas?
>
>Thanks!
>
>Harold
>
>
>
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