Soap dispensers often use a small infrared beam to detect hands. It is cheap and it works ... on white hands.
Or so this scum at the overpriced re-education camp says.
Next time you stop off at a highway rest stop, check out the restrooms. This claim is not true. Even dark paws can trigger touchless devices.
Infrared sensor means monochrome. It does not see color.
https://www.zerohedge.com/markets/uc...ers-are-racist