Glossary
A hot lip filament HL is wired more densely at the upper part than the standard heating assembly. This way a higher temperature near the crucible lip is achieved by using only one power supply for the heating.
View onto hot lip filament of a WEZ 40-35-34-S-HL cell
Alternative filament types are Standard Filament SF, Cold Lip Filament CL, Tip Filament TF and Dual Filament DF: