There's another solution I found after looking a bit into the KDE Mailinglist. The Problem of the missing libsensors-1debian1 is known and somebody has posted the url of a KDE Wiki where you can download and dpkg -i that package.
After this, you can install kdebase. -Benoit- > http://www.hugo.weite-welt.com/ksysguard_3.1.3-1_all.deb > > after installing that deb you can run: > > apt-get install kdebase