Cheap CO2 Flow Meter Review

[Yugang]

Does this mean if it's close to a solenoid, that the heat from the solenoid could throw the readings off? I wonder if that is part of the discrepancy I see between my flowmeter and the digital one.

Possibly, but I am not sure. I believe in any case, calibration would be useful if you care about absolute values. If you're interested in relative values, or just keeping flow constant less so.

 

[Sulla]

Let me know if you need any help/code when the time comes. I have played around a lot with the calibration process and think I have it pretty settled now.

@JacksonL I was going DM you, but I figured seeing as there was interest from others, maybe public could be good.

So you saw my jerry rig earlier (its messy as hell, but at the moment I dont care, I just want to prove it works, can invest in neatening setup later) - but long story short, it all works (bus readings are good, home assistant integration works, etc) and now I need to calibrate.

With both caps on I'm getting the 32000 reading, which seems to be the standard 0 reading. So...any advice on how to calibrate now that its setup?

 

[renesis]

@JacksonL I was going DM you, but I figured seeing as there was interest from others, maybe public could be good.

So you saw my jerry rig earlier (its messy as hell, but at the moment I dont care, I just want to prove it works, can invest in neatening setup later) - but long story short, it all works (bus readings are good, home assistant integration works, etc) and now I need to calibrate.

With both caps on I'm getting the 32000 reading, which seems to be the standard 0 reading. So...any advice on how to calibrate now that its setup?

I haven't calibrated yet, but I also saw the 32k reading as baseline.

I was planning to calibrate by putting a syringe on the end after the needle valve, and timing how long it takes to fill, unless there's a better and more accurate way. Hopefully JacksonL has some insight.