Pinkel refers to a kind of German sausage made from groats (Grütze). Moreover, Pinkel refers to a smoked sausage from Germany that is made from raw bacon, onions and groats. It is classified as "Kochwürste" (cooked sausage) and is the specialty of the Northern region of Germany, like Bremen and Hamburg.
Pinkel is usually serve with Kale (Grünkohl) for Kohl und Pinkel, a traditional Northern German dish.
The 2 pictures above show raw Pinkel. And below is how it looks when it is cooked
The picture below is one of the brands of Pinkel being sold in supermarkets in Bremen, Germany