EnviroESCA features a unique modular approach to the system design, combining the advantages of several specialized ESCA systems in a single entity. It is adaptable to suit different experimental conditions through the use of dedicated interchangeable sample environment modules. As in any conventional ESCA instrument the electron energy analyzer and the X-ray source are the key components of EnviroESCA. But combined with SPECS advanced, automated vacuum and gashandling systems, reliable working conditions in pressure ranges from ultra-high vacuum to hundreds of mbar are now possible. This combination enables the user to investigate even the most challenging samples of a class that was incompatible with traditional ESCA equipment.