No pic to add, but a comment (can't help myself sometimes /forums/images/graemlins/tongue.gif)... I have tilt meters on both my Kubota and my little JD lawn tractor. For both machines I drilled a hole in the hood and mounted them right in front of me where I can see them all the time.
It is true that they don't predict the future, but I find them quite useful when I start to get nervous about the way the machines "feel". (Yes, I do take my JD on slopes - can't really help it where I live.) I take it nice and slow on slopes, but it really is the gopher holes and rocks on the upside that will cause a tractor to flip.
When I'm getting concerned (pucker factor rising), I look at the tilt meter and figure how much leeway I have - if I'm close to the limit then I figure that I'd best not proceed 'lest the unforseen hole or rock push me beyond said limit. So while they will not prevent a rollover, I think that tilt meters are a useful tool in trying to anticipate one and avoid it. If you know you are already on a 20 degree slope and that there is rough terrain ahead, that is useful information that can help you figure out your next moves.
OK, so I'm a fan of 'em. Must admit it. And I haven't rolled a tractor...yet /forums/images/graemlins/grin.gif.