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Can anyone show any pictures of before/after filtering with a 0.1 micron filter? The lack of clarity in my beer is rather frustrating. I've used gelatine and Kieselsol recently to no avail. Cooling to 0.4 C. Leaving gelatine for 1 week and Kieselsol for 3 days. 10ml gelatin 20% and 10ml...

Hi, I'm wondering if anyone could point me in the right direction. I know if I just have say 10kg sucrose in 20l of water, I can get an OG of 1.19195. And calculate FG with an apparent attenuation of 122%: 1.19195-(((1.19195-1)*(122/100))) = 0.957771 FG Also if I have a wort...

I'm skeptical on the accuracy of refractometers in general once there's fermentation. Ideally spectroscopy would be the solution, but the sensors are ridiculously expensive (currently).

creekrat, I'm not sure what you mean exactly by weight options. Do you mean where you dangle a weight in the beer, like beer bug, if so I've tried that approach, but found massive problems from creep from the load cell.

You could certainly try, I'm not sure how accurate that would be though. I'm trying to measure the speed of sound using a 100MHz ADC to try and get fine grained information.

I'm working on a specific gravity meter using ultrasound currently. I'll be charting my progress on http://hackaday.io/project/1231-Zymeter The idea is to measure both the speed of sound and the amplitude of the returned pulse, in order to calculate the specific gravity.