I currently live in a rented property that I suspect was wired up by a cowboy, the outlets are anchored poorly in the walls and the breaker board hums when any high-energy appliances are running. It also appears to be playing havoc with some of my more sensitive equipment, namely my servers and my router. Not enough to have killed any of them yet, but they exhibit erratic behavior they did not show before i lived here, this coupled with flickering lights & humming circuits leads me to believe its dodgy electrics at play.
I noticed on another question on the Stackexchange network (specifically this question) that the original poster had graphed their voltage against time, I think something like this would be perfect to confront my landlord with empirical evidence that something in his property is wrong (and also because I love data and would probably use this in future properties too, and this is a great way to justify the expense to my girlfriend)
I was wondering if its possible to pick up equipment capable of doing this cheaply, and what exactly would I be looking for?
EDIT: I live in the UK so it needs to be able to tolerate 240V+