On-line gloss meter is an essential operation in the paper milling industry. On-line gloss meter is the checking and recording of the finished sheet gloss level. Industrial on-line gloss meter monitoring system T7G allows measuring the gloss level of a continuously moving sheet of paper whilst being processed on a super calendaring machine. The actual trend is toward self-controlling manufacturing processes, so this on-line gloss meter robust unit can be fixed directly on the machine and giving appropriate signals to a recorder or a PC. On-line gloss meter is now possible to monitor in real-time gloss level shifts from the nominal value.