A simple thermometer image suitable for generating different version programmatically. Here's an example generator in sh script:

f () {
sed -e "s/height="10"/height="$1"/"
-e "s/Foo/$2/"
-e "s/Bar/$3/"
-e "s/Baz/$4/"
thermometer.svg |
rsvg-convert -o thermometer.png
}

Tags: media, clip_art, public_domain, image, png, svg, tool, tool