The most mature sensor technologies in my opinion would have to be Johnson Controls. There are several sensor types, with various capabilities. For intrusion prevention, there are also several manufacturers, all of which have been doing these systems for many years. Cisco does have products that interface with the majority due to the fact that the protocols are very mature and interoperability is well tested. I would suggest a Web search on intrusion protection systems. There are a bunch out there, find the one that best suits your needs. Keep in mind that there are various interfaces available, but most can interoperate one way or another.