raschemmel:
Since the fill flow sensor and drain flow sensor are separate sensors, even if identical, the accuracy may differ , which is , I think why Peter is recommending that they both be calibrated.
I was planning on using a single reversible pump for each container, in this case it would only be one sensor for each bag
PeterH:
It would be more important that the flow sensor was consistent in each direction than that it worked the same in both directions - you will probably need to calibrate it separately in each direction.
I ordered a flow sensor so im going to get it and play around with it when it comes in, from what i can see it doesnt look directional so i will setup a mock environment and see what kind of readings i get.
GoForSmoke:
You could measure how full the tank is.
since the container is a bag, not sure what kind of sensor i would use
PeterH:
How are the containers/bags going to be supported? If they're suspended, or supported by a platform/support which could be allowed to move, then it would be possible to take the weight with a preloaded element which would deflect when the weight exceeded a threshold. You could use that either as a visual prompt to stop filling, or to operate a switch to indicate the full level.
The bags will be sitting in a compartment, they wont be suspended, i was playing around with the idea of building a weighing platform of some sort, but i don't think i could do that very cheap for the amount of weight I'm going to be having.