Add to ORKGMonitoring grid platforms has recently gained a wide interest. This kind of platform highly distributed across different domains leads to several design and implementation problems. We have designed a new monitoring platform and visualization tool adapted for Network Enabled Server systems. This environment, highly tunable for different middleware platforms has been successfully validated on the DIET platform. In this paper, we present its architecture and main features as well as details of the validation on the DIET environment and experimental results on a large scale grid platform.La surveillance des plates-formes de grilles a récemment connu un intérêt important. Ce type de plate-forme distribuée entre des domaines différents donne plu...