Symbol 3370 from ISO 7000 - Title/Meaning: Ambient air temperature, inside operator cabin Function/description: To indicate the ambient air temperature inside of the operator cabin. To identify the control that adjusts the ambient temperature inside the operator cabin.
pay attention to orientation of symbolAdditional information: 
Symbols applicable to specific machine forms may be substituted for this symbol.
Own work using: iso.org/obp/graphics/grs/d19a8e12-ac56-49d8-a49e-740061e0d422 200.png
Vectorization:  Mrmw