That’s a cool desktop applet to show the systme temperature, fan speed, voltage, etc.
After I got lm_sensors running I wanted to get the sensor information on my desktop running GNOME. I installed GNOME Sensors Applet using yum (yum install gnome-applet-sensors).
It showed three temperatures(Only two successfully, other with an error), and I removed one. Two temperatures must be mother board and cpu temperature.
You should give a try to GNOME Sensors Applet, if you miss the Windows applets that are usually provided by the mother board manufacturers or just curious.
Cool applet, thumbs up Alex Murray and lm_sensors project