sudo apt install psensor
I'm quite fond of
psensor... it runs on the Indicator Bar (the "Systray" near the clock), so it is perhaps the most unobtrusive app that uses
lm-sensors. It also can show a nice window with graphs displaying the history of each sensor, just like System Monitor does for memory, CPU usage, etc. It has logging too!
It also uses sensors other than
hddtemp for HDD temperatures and NVidia and AMD GPU (video cards) temperature and fan.
Better screenshots than mine can be found in the author's website: