Reports the device's internal temperature in tenths of a degree Celsius, with special sentinel values of 9998 (sensor not supported) and 9999 (sensor not connected). Admins monitor this to catch overheating in the equipment rack before it causes a hardware fault, while knowing to ignore the reading (rather than alarm) if it returns one of the two sentinel codes. A value of 235 means the unit is running at 23.5 degrees Celsius, while a reading of 9999 tells the admin no temperature sensor is actually wired up on this unit.