Which container boils water for longer?

How does a kettle work?

Technology kettle

There are kettles in almost every household. But how does a kettle actually work? Read the most important answers here!

How does a kettle work? That depends on the model.

Today there are kettles in different versions: They are equipped differently, for example with a temperature selection, integrated water filter, keep warm function or a button for heating baby food. Kettles are also available in plastic, stainless steel or glass. They are also often far apart in terms of price. The cheapest plastic models are available for just a few euros. High-tech kettles made from noble, high-quality materials, on the other hand, cost up to 150 euros.

How does a kettle work? The basic elements!

Despite different functions, materials and equipment - a kettle basically consists of the following elements:
  • Base: The cable that you plug into the socket is attached to this. When you place the container on the base, it supplies the kettle with electricity - and thus heats the water. Domestic kettles have a mains voltage of 230 volts. It is lower for travel kettles or devices for the car (at 12 or 24 volts). The reason is that you connect the car kettle to the cigarette lighter in the car with the help of a specially shaped plug. If the voltage were higher, the car battery would quickly run out.
  • Water tank: It consists either of plastic, stainless steel or glass. Plastic devices are cheaper and do not heat up as much - the risk of burns is therefore lower. Stainless steel stoves are better insulated, heat the water faster and also keep it warm longer. But: They often get very hot! Glass is easy to clean and very hygienic, but prone to breakage! The elegant look of glass and stainless steel is more impressive than plastic. The capacity is different and usually ranges from one (travel kettle) to about two liters. But there are also XXL versions that fit 3.8 liters of water. For heating, place the container on the base and turn it on.
  • Heating element: Older devices have an open heating coil at the bottom of the water tank. It heats the water according to the principle of an immersion heater, but is susceptible to calcification. Sometimes substances also loosen from the heating coil and go into the water. Modern kettles are better where the heating element is not exposed in the water, but hidden in the bottom of the kettle. Usually only a metal disc is visible.
  • Temperature sensor: The rising water vapor during cooking heats the temperature sensor. However, this only works if the lid of the water container is closed and the steam does not escape. Once the target temperature has been reached, the kettle switches itself off.