An electronic device and a system are to be provided in order to allow, at any time, monitoring of a cooking state (as a system state) of a product cooked preferably in a liquid. This is achieved by means of a hermetically sealed body with an electronic arrangement accommodated in the body. The arrangement comprises an electronic assembly (10) with a model-forming arithmetic unit (11) and a temperature sensor (20) adapted and arranged to measure an ambient temperature of the body. In addition, an electric power source (30) and a radio interface (50) with an antenna (52) are provided, the model-forming arithmetic unit simulating a model of a cooking behavior of a foodstuff to be cooked. Information on the current cooking state of the foodstuff is transmitted from the transmission unit (52) to a receiver (a smart device) spaced apart from the hermetically sealed body.
