AVR-Chat

> All to avoid purchase of a sensor which won't be damaged by the liquid?
>
> The compressed air in the inverted standpipe will eventually dissolve
> into the liquid. This proposed solution will not work in a static
> situation, must be cyclical allowing the air in the standpipe be
> refreshed periodically.

Valid points..  I'd once proposed stream level monitoring by using a
roller pump to smoothly push air into a pipe that was anchored to the
bottom.
The idea being that the continuous flow of air keeps the pipe clear of
cruft, and is pretty benign to the sensor.
You have to subtract outside air pressure, but that's just one more
sensor that we needed anyway.


-- 
There is no computer problem which cannot be solved by proper
application of a sufficiently large hammer.