It can be flexibly used with many gaseous fuel types. For thermal efficiency, high temperature cooling options are provided. Owning and operating costs are low and design is robust with electronic controls to optimize performance. It offers Wide range of bolt-on system expansion attachments whose flexible packaging has ben tested and cost effective installation provided. The Cat(r) SOS(sm) program can detect internal engine component condition due to the presence of combustion by-products and unwanted fluids. CAT SR4B GENERATOR has been designed in order to match performance and also the output provided by Caterpillar gas engines.