Special characters in tags

There are some problems when the tags contains special characters, e.g., # and %.
Especially for some manual sampling points, the system number is folled by # then the sample point number, and what was measured at the sample point, e.g. "47#13-SULPH". This I was able to solve by replacing "#" with "%23". This is maybe a fix you could implement in the base code?

But the real issue appear to be when the tag contains "%". For some measurements, a percentage recovery is stated, e.g. "50#12-5%REC". Here I can replace the #, but if I replace "%" with "%25", Tagreader does not return any values. If I paste the XML payload URL into by browser, I can get the output which Tagreader should have gotten.