System combines a PLC platform with advanced gas and flame field devices. It is scalable, making it suitable for both small and plant-wide applications. Up to 13 local gas and fire alarm panels can operate over a network of up to 25 km in length. The controller, hardware configuration and software that comprise HazardWatch System have been tested and certified by Factory Mutual to verify NFPA 72 compliance. This includes certification for central station monitoring, as both a fire-alarm panel and gas controller, for fault-tolerant digital communications and as a releasing control panel.