"We used the c-DGM at several locations during our brewing process,” Jordan explained. “Carbon dioxide and oxygen levels were measured at the end of fermentation, prior to dry hopping, post dry hopping, prior to tank transfer, after tank transfer, and after adjusting the carbon dioxide content in the Bright Beer Tanks".
The c-DGM’s O2 measuring range is 0 to 2,000 ppb in liquids, the CO2 measuring range is 2.0 to 10.0 g/l. The insights provided by the instrument allowed Boxing Cat to significantly improve its production process.
"We found out that our DO levels were higher than expected, which led us to adjust our processes of line purging and tank purging. We also saw increases in DO on several occasions after adjusting carbonation levels. The most important outcome of this pilot trial is that the c-DGM enabled us to identify that we have a high variability of CO2 purity, which resulted in the decision to switch our CO2 supplier,” Jordan said.
Overall, the brewery succeeded in lowering DO levels substantially. “The c-DGM is very precise, and also provides the possibility for quantitative recordings, which is important as our brewery grows, and we look toward the future, where we might bottle beer or consider filtration. I think, the c-DGM is a very valuable tool for craft brewers to use.”