This read-only Integer32 value, ranging 0 to 20000, reports the reading from the PDU's second external temperature probe in units of 1/100 degree Fahrenheit, as its description states. Having a second independent probe lets an admin compare readings at two different points, such as the front and rear of the same rack, to detect uneven airflow rather than relying on a single sensor. For example, if temperatureProbe1 reads 7200 (72.00F) while temperatureProbe2 reads 9100 (91.00F), the admin can tell the rear of the rack is running hot even though the front looks normal.