Symbol 6276 from IEC 60417 - Title/Meaning: Electro-dynamic (ferro-dynamic) ratiometer, ironless; electro-dynamic (ferro-dynamic) quotientmeter, ironless Function/description: To indicate the instrument for measuring the ratio (quotient) of two quantities by making use of the ironless electro-dynamic (ferro-dynamic) characteristics.
Additional information: 
See also the symbol IEC 60417-6277.
IEC 60051-1 provides technical details.
Own work using: iso.org/obp/graphics/grs/f2a89126-b9da-44c9-bd75-7f74daf1c7e7 200.png
Vectorization:  Mrmw