For more than 30 years , Oil & Gas Systems Ltd ( OGS ) has specialized in providing high-quality , bespoke engineered metering and process systems for the oil , gas , and power industries . With a reputation for unparalleled quality and service , OGS is involved in all stages of project execution , including initial design , detailed process design , mechanical and electrical design , control and instrumentation , manufacturing , testing , packing , and shipping , as well as site erection and a commissioning service if required .