What report writing/viewing software for the Sensatronics E4 is required at the client end?

The Sensatronics E4 supports SNMP so you can use many different network management tools to create reports, even open source tools like Nagios and MRTG are supported. The easiest way to create reports is using Intellipool Network Monitor. You can add a number of Sensatronics E4 or many other environment monitors to be polled by Intellipool. Intellipool has a very powerful report generation facility.