We recently installed our first sensor in Dorset, by the River Winterborne. This includes a rather different installation which shows the water levels in a pump & sump system for a 16th century cottage rather than the river level. The sensor in the sump tells us when the water levels below the property are rising and when the pumps are working to 'bail out' the site.
We're awaiting Environment Agency approval for a second installation above a stream culvert since this watercourse is under their management. When we get approval we'll publish the levels.