I just installed lm_sensors on my system. Now I want to see the output on the gnome 3.6 desktop. So I installed sensors-applet. In the 'classic' gnome (before version 3) you could add items to the panel by right-clicking on it. But how do I change the panel in gnome 3? I looked at: https://live.gnome.org/GnomeShell/CheatSheet, but could not find up to date information there.
I think you'll want to install panel extensions from extensions.gnome.org, you can deactivate and uninstall them on the same page with firefox.
Thanks for your answer. You certainly pointed me in the right direction. I went to https://extensions.gnome.org/ and found the 'hardware sensors indicator'. I switched it to 'On', downloaded it and now it's activated - by the way: the gnome-extensions-site seems to be unreachable now. But no hardware sensors in my panel...