Convert from a reference electrode scale to SHE

Enter a potential along with its reference scale and electrolyte concentration, as well as the temperature.
This converter is a very simple demonstration of the refelectrodes package.
This demonstrator comes with some limitations compared to the actual package: it does not support electrolyte, and does no checking for nonsense input. For actual work, please use the functions directly from your command line.
The package and its dataset are described in a post on my blog.