Here in Pa the Albion Prison has an STH-10, Rockview State Pen has a Model 5, as far as mental health facilities the Wernersville State Hospital had a Diaphone that was used for escape and also as a fire call alert. I do have a mystery siren on my hands though, at the Hartsville, Pa Fire Department there is a Whelen 2000-R that was supposedly part of a mental health facility escape siren system. I used to do mental health transports and have never been to a place around the Hartsville area and I can't find any mention of such a place in that area so I have no idea what facility it was for. They also have a Model 5 that they use for a fire siren, the 2000-R is mounted on the same pole as the Model 5.
You can see the Model 5 and (barely) the 2000-R in this streetview of the firehouse (you have to zoom in to see it):
http://goo.gl/maps/GSEfb