Symbol 0588 from ISO 7000 - Title/Meaning: Feeler; sensor 
Function/description: To indicate a reference to a feeler or sensor (for example, to identify a control operating a feeler or sensor).
Own work using: iso.org/obp/graphics/grs/5fb862d7-4263-4ca3-99ff-fb9f007ea061 200.png
Vectorization:  Mrmw