Bandwidth icon

Searched the web for some examples of a "bandwidth" icon and noticed there are very few, if any (bw/flat at least). Here's my take on it.

I'm still little bit unsure of the whole gauge/thermometer -metaphor. Feels a bit anachronic. Still lot of "test your bandwidth/speed" -sites still tend to use this metaphor.

How does it feel for you? Is the icon understandable? Does the metaphor read well?