Milk guardian
A milk monitor is a cooking aid that is used to prevent liquids (usually milk ) from boiling over .
- The most common are milk guards made of porcelain , heat-resistant glass or stainless steel , which, when placed in a saucepan, announce the boiling by loudly rattling and thus giving cause to remove the milk from the stove before it boils over (rattle stone, milk alarm).
- More rarely there are attachments for pots or fireproof jugs that are shaped in such a way that part of the rising water vapors can escape, but due to their special shape, the boiling milk cannot foam over them.
There are different forms of milk guards of the first type, for example an approx. 1 cm thick disc with a diameter of approx. 8 cm and with inwardly curved circular surfaces. In the space between the bottom of the pot and the curvature, the boiling point of the liquid is reached earlier than in the rest of the pot because of the interrupted convection . Steam fills this space, lifts the disc, escapes upwards and the disc falls back onto the bottom of the pot, making the noise. For a more even rattling, these milk guards have a notch on the edge on each of the two sides, which is preferably used as a path by the escaping steam. Hitting the bottom of the pot also leads to nucleation nucleation , as with a boiling stone , which can prevent an otherwise threatening delay in boiling with sudden (!) Overflow.
In southern Germany, especially in Swabia , the milk guard is also called "Klepperle" (based on the noise in the boiling liquid). In the east of Germany, the term milk keeper is used. In Switzerland , the term "Milchklopfer" is often used.
Borosilicate glass milk guard
Porcelain milk guard
Stainless steel milk guard
Milk guard, attachment made of borosilicate glass
