Bronkhorst Flowmeters use a somewhat unique protocol for communication. In the ascii protocol the resonse is transmitted as an unsigned integer coded as 4 hexadecimal chiffres. The values are normalized so that 32000 (7D00h) is 100% of the capacitiy of the device. For my case, valid Values range fr...

Finds any value inside the HTML ... in order to replace with $...$

The string must be less than 21 characters, mus not have spaces, it can only contain lowercase letters, hyphens (-) or underscores (_)

Add dots BEHIND the y to make the selection go backwards (the y can be anything you want) and add dots BEFORE the \K to make the selection go forwards. The dot after the \K is to make the selection a whole letter.

First matches the children specified opened or self-closed tags and their contents. If not found, matches opening tag. If not found, matches closing tag.