Gbark;47211 said:Just wondering if anyone uses a rotameter for CO2 flow rate to reactor instead of a bubble counter. I currently use a bubble counter, but i find them crude and inconsistant to read.
Tom Barr;47216 said:Mass flow controllers are much better.
Biollante;47215 said:I love the fact that once you find a setting it is easy to get back to where you started, if like me you like to try things. I like the fact I can see the process and sighting is easy. They can be had fairly cheap, it really depends on how much calibration you require, contrary the opinion of the intelligentsia, I do not think there is much need. It is relative, once you are happy, that is your calibration.
Biollante;47288 said:I do not know how good the answer is, I hope it helps. I do think with a quality control valve, and the Fabco may well be such, that your vernier mod ought to keep you in the proverbial ballpark.
pat w;47327 said:Since the low end of the acceptable range is just short of what Riccia needs to pearl and the high end is distressed fish, ballpark should just about do it, right? After that I should just have to focus on distribution and stabillity.
Before answering your question, I should ask, I should have asked, what you are trying to accomplish?
How are you controlling your CO2 flow?
Honestly if the issue is control, I would rather see you spend your money on a quality needle valve. Knowing the volume of gas going in is great and it does make life easier when fiddling with levels. But rotameters are not magic and the valves on cheap rotameters are, well, cheap valves. If you have a good needle valve, that is fine a cheap rotameter will work well.
Gbark;47334 said:Hi Biollante,
I am controlling my flow through a bubble counter using a TMC needle valve and regulator, with solenoid valve for auto shut off.
It is not a matter of control, I would like a means of knowing my CO2 flow by reading a scale rather than counting bubbles for 30sec at a time!
I suggested a Rotameter as these are cheaper than a flow controller, Also i'm not after a fancy DCS setup, this is far to expensive for a living room aquarium.
Which ones do you use?
I did a guesstimate the other night about the volume just to see 'about' what the rate might be.. As an example, one bubble per second that is 4 mm in diameter (2 mm radius) is 0.12 L/hr or 0.002 L/min.shoggoth43;47390 said:... If you want to try something consider how many bubbles/second you run and then multiply by seconds to get your minutes. ...