Automated volume sensing idea/help

[BrunDog]

I am thinking of using optical sight glass sensors. They would not be analog, but I don't see that being an issue. Just set the height on the sight glass, and monitor when they switch.

-BD

 

[JKoravos]

Was looking at the MS5805 as way to measure volume.

Datasheet-http://www.datasheetlib.com/datasheet/1438323/ms5805-02ba01_msi-measurement-specialties-inc.html

Not sure of the sensitivity yet, but I was thinking of attaching via some sort of tubing to my existing sight gauge tube and connecting it via analog pins on my Beaglebone Black. The additional pressure in the sight gauge should be enough. Goal is to use on a 6 bbl system. I'm sure there are a number of reasons it won't work but.....

It looks interesting, but there's only 2.5mbar per inch of water, so the full range of operation for a typical kettle is only going to be 25-50 mbar. I'd be worried about resolution on a sensor that has a range of 2000 mbar. The data sheet shows a resolution of 0.02 to 0.35 mbar depending on oversampling rate. I think it would be fine if that's the real resolution, but it seems like a pretty optimistic spec.

 

[kladue]

The digital pressure sensor was the right idea, just the wrong product, look at the LM series analog sensors with ss diaphragm and pvc body http://www.meas-spec.com/downloads/LM.pdf. When mounted away from the hot process they work well as the static fluid in the tubing cools to ambient and protects sensor. I use remote mounted pressure transmitters and software to correct density based on temperature of liquid in kettle and estimated SG. While not perfect it is usually very close across wide range of conditions in the automated system

 

[Brewer Gerard]

Has anyone done it yet? I might embark on this mission as my first foray into Arduino programming. I'd hate to just replicate something that's already been done.

I've been up to my eyes for the last few years but i'm back on this project now and am going to give a proper go.

It's been a while since you posted JKoravos. did you have any sucess?

 

[JKoravos]

I've been up to my eyes for the last few years but i'm back on this project now and am going to give a proper go.

It's been a while since you posted JKoravos. did you have any sucess?

I've got the code working for the sensor. It seems to work reasonably well. It's a matter of implementation now. I've been putting a lot of effort toward my brew system, in general, lately so I may get to the implementation soon, as well.

I think as long as the sensor is reasonably well protected from the hot, moist air over the liquid, it should work well enough. The trick is keeping it flushed with relatively dry, "cool" air.