Peter L. Peres wrote:
....
>However, there is a similar method, that is used, and works well. It is the
>one with the thermistor wire that is partially immersed. This is what
>measures the fuel level in your car's tank probably. The sensors are
>available in lengths of up to 10 ft (can you say marine diesel tank ?).
>Check out a National catalog for chips that interface to these, although you
>can roll your own. Note that most sensors are 'bare' wires but there are
>such sensors with teflon or ceramic clad wire which can go into evil liquids.
>These are expensive and fragile. The fun part is, that this method is
>imprevious to sloshing as it integrates the 'waves' away ;-)
>

Peter, can you more fully describe the makeup of this 10' length
of sensor? I thought a thermistor was basically a resistive bead with
copper wires attached. Are you referring here to some kind of distributed
thermo-resistive element? Confusing.

- Dan Michaels