This page shows the different variations of the Barometr from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free. Icons are available in PNG and vector.
The icon is a simplified, old-style gauge. A circular case encloses an incomplete circle of dots, representing the different levels to be read off of the gauge, with an arrow pinned in the center, with an arrowhead on one side, and a tail on the other side. The arrow is pointing northwest.