SENTINEL PRO is the latest evolution of the successful Riello Dialog Plus online UPS. This latest development has been designed with the environment in mind and is part of the Riello ECO Line of UPS.

SENTINEL PRO is an on-line double-conversion UPS offering the highest levels of reliability and protection for critical servers, voice and data processing IT systems.
For long runtime applications, Sentinel Pro (ER models) can be fitted with matching battery extension packs which also include additional battery boost chargers.