A. Allow the refresh rate of your gauges to be set, or disabled entirely and only refreshed manually, perhaps with a button (so your user's screen reader can fi

A. Allow the refresh rate of your gauges to be set, or disabled entirely and only refreshed manually, perhaps with a button (so your user's screen reader can finish at its own pace). B. Use SVG, and something like D3 to build your graphs with a textual representation. I have no idea if ARIA works in SVG, but I know there are plenty of ways to label your data textually, even without aria-label, etc. Unfortunately, there's probably no good way to convey information in the same way that visualization does for sighted users (being able to intuit trends from lines, for example), but even just having access to the aggregate numbers in a time series is better than nothing.