Symbol 0159 from ISO 7000 - Title/Meaning: Level Function/description: To identify a level (for example, on a control which adjusts the level of fluid in a vessel).
Application referenced in: ISO 10284, ISO 11192, ISO 3287, ISO 3767-1, ISO 5232, ISO 6405-1, ISO 7296-2, ISO 8999, ISO/TR 15847
Additional information: 
For use primarily as a symbol element in combination with other symbols to indicate the type of medium whose quantity is measured. The line at the bottom of the symbol may be deleted and an appropriate symbol inserted.
Own work using: iso.org/obp/graphics/grs/aff4ead3-30e0-42ed-a3cb-324e6ef555de 200.png
Vectorization:  Mrmw