Idea of CO2 Gauge Icon
The icon is a simplified depiction of a gauge meant to be used in order to monitor CO2 levels. A box with a small window inside which sits a needle comprises the gauge part of the device. Atop it is a circle with a C inscribed in the middle and two unfinished circles on either side, representing the form of a carbon dioxide molecule.
This CO2 Gauge icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.