There are 4 types of system sensors that can be retrieved with uesensor; each sensor has an identifying token:
3 - Thermal sensor
9001 - Fan speed sensor
9002 - Voltage sensor
9004 - Power supply sensor
Each sensor is uniquely identified by a combination of token and index number; index numbers start at 0 and are contiguous. For example, the second fan on the system would be identified by token number 9001 and index 1.
The state of each sensor consists of a status and a measured value. The status value is one of the following:
9 - Critical low
10 - Warning low
11 - Normal
12 - Warning high
13 - Critical high
The measured value depends on the type of sensor. Thermal sensors are measured in degrees Celcius; fan speed is measured in revolutions per minute; voltage is measured in millivolts; power supply measurements are defined as follows:
0 - Not present
1 - Present and not operational
2 - Status unknown
3 - Present and operational
Each sensor is also associated with a location code; this location code may not be unique (for example, there may be multiple voltage sensors on a planar).
1.3.8