Symbol 5649 from IEC 60417 - Title/Meaning: Limits, general Function/description: To identify the control or the indicator to display and/or to set limits, for example on medical equipment for patient monitoring, to indicate a reference to limit values corresponding to a possible critical situation.
Additional information: 
Published in: New edition, 1998,3C/359/FDIS,3C/282/CDV (62A/170/CDV)
Own work using: iso.org/obp/graphics/grs/3f2b2e8d-9fc4-4fc2-b72b-f0b5dba2af47 200.png
Vectorization:  Mrmw