Face for System Monitor Plasmoid for Plasma 6 with some gauge themes.
Thanks to the authors for their work :
Mart who created Gauge Digital on plasma 5: https://www.pling.com/p/1446770 https://github.com/notmart/systemmonitor-faces
Mjkersey who created SysTach on Plasma 4: https://www.pling.com/p/999093
Driglu4it who ported and modified Systach face on Plasma 5: https://www.pling.com/p/1596058
Instruction for manual installation:
If you install manually, extract the archive into an "OmniGauges" folder and place it in your home: /.local/share/ksysguard/sensorfaces/