Comparison Zelmer CK1050 2200 W 1.7 L stainless steel vs Zelmer CK1020 2200 W 1.7 L

A device that allows you to estimate the amount of water in the kettle without opening its lid. Most often the water level indicator has the form of a scale applied either to the transparent wall of the container, or to a transparent insert in an opaque wall. In any case, this function allows you to measure the volume of filled water quite accurately, and not just determine it “by eye”. This possibility is especially important for models with open coils (see "Heating element"), in such devices, a mark on the indicator is usually applied to the minimum allowable water level.

A small mesh (usually at the spout) that catches scale flakes and small particles to prevent them from getting into the cup when pouring. Its convenience lies in the fact that the filter can be quickly removed, rinsed under the tap, or cleaned with a soft brush without taking the kettle apart and without fussing with citric acid every time just for a few "crumbs" in the drink. Unlike non-removable inserts or "for show" filters, the removable option is easier to keep tidy, clogs less, and stays neat for longer, especially if the water is hard and the kettle is actively used at home or in the office. In practice, this is useful when you frequently boil water for tea/coffee or children's drinks: the filter does not completely solve the scale problem inside, but it significantly enhances comfort because there is less residue in the cup and the taste remains cleaner.