In order to add a sensor, perform the following steps:

1.  Select device from the aspect tree in Home view (a VMware server in this case).
2.  Select Monitors tab and switch to sensor list by clicking Sensor list link in upper-right corner of the tab field.
3.  Sensor list is displayed.
4.  Select Add from the global action menu and click the Go.
5.  The wizard dialog is displayed.
6.  Select the sensor you want to add and click Next.
7.  A dialog shows up with all sensor parameters to be provided. Specify the sensor parameters and click Finish.
8. Once the sensors have been added, they are visible in the sensor list (Monitors tab).

Screenshoot: