Can the US plug PG03-US16A-TAS-1 be used to monitor power consumption?

I know I'm late with the responese but may be it can help to someone. Yes, you can. The periodic update of the screen with parameters in browser is handled by http GET requests. You can write a simple program (for instance in Python) that sends periodically the request using urllib module and parse the returned html to fetch the parameters. The same python works for both Windows PC and Raspberry 4 with Raspbian.