I've been thinking of pasteurizing eggs, which requires heating them to a specific range of temperatures for a continuos set of time.
I thought about finding a sort of electric kettle that has heat-preserving abilities in order to reach at simple consistent results, but looking online I can find only products aimed specifically at the Chinese market for making sorts of herbal teas with either a small set of predefined temperatures or at intervals of 5° Celsius up to 100, which might fall on a good egg-pasteurizing temperature, but that's still not as good as a higher resolution approach would have been (and I don't know if it's even accurate enough in its temperature-keeping). Also, because these products are in Chinese and their information is not clearly translated, I'm not sure they even work in the required manner.
I think in essence a sous vide can be used, but they seem rather expensive while in the product I have in mind is a simple small thermostatically-adjustable electric pot of-sorts.
Anything like this exists?