Re: Liquid level indicator

Hi Chris

Yes, I do seem to take beer very seriously! The quality of it at
least!

Thanks very much for such a detailed response. I really appreciate you
taking the time to explain this stuff to me. All that you say makes
sense.

I may have missed this, but I assume I need to have a 'common' probe,
and then the H & L probes?

Hey, the ovverride switch is very neat - so simple, why didn't I think
of that! :) - got carried away with the logic gates I guess! No need
for a resistor here at all?

I actually need to control/pump/empty two seperate vessels (not at once
- they share the pump). How would you suggest I switch between one set
of sensors and another? Two identical circuits, but switch the final
pump drive from an OR gate or switch between one cct or another in to
the relay coil?

btw, I did look at the commercial float switches and considered them a
bit pricey (maybe you have a good diy source?). Not sure what's
involved with using these things - are they just simple switches?

It's not likely I'll get to build the cct in the next few days anyway -
work is rather busy at the moment - working weekends etc. :(

Thanks again
Cheers,
Mark

.

Relevant Pages

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