The paper introduces three optical imaging technologies that can be used to detect and locate SF6 gas leakage in GIS
which can make the operator "see" live images of leaking gas
and provide a new method to identify high leaking sources more quickly. Remote sensing and instantaneous detection capabilities of these technologies allow an inspector to quickly scan large areas of GIS apparatus and to immediately identify the significant leakage. Compared with traditional off-line and other on-line detection technologies
optical imaging technology is a great breakthrough in the SF6 gas leakage detection.