Ok he system description OID looks good.
Can you check if your device answers a query on OID .1.3.6.1.4.1.674.10895.3000.1.2.110.7?
This is the sensor table for Dell powerconnect devices. These devices are using the system description OID .1.3.6.1.4.1.6027.1.3.22. As this is nearly the same a test would be good 