This function lies in the fact that the thermometer "evaluates" the surrounding conditions — how comfortable they are for a person — and displays the result on a scale. It can be implemented in different ways, depending on the purpose (see above).
So, in models for water, additional marks on the scale are used — “Cold”, “Hot”, “Optimal” (for bathing a child); it is much easier to assess the temperature of water on them than on a scale with degrees. In domestic electronic models (see "Type"), the comfort is often determined by a combination of temperature and humidity. And in models with the possibility of external measurements,
the comfort temperature can mean the perceived temperature. The meaning of this indicator is that at high humidity, both heat and cold are felt more acutely — as if it is hotter or colder outside than it really is. Some thermometers are able to estimate what temperature will correspond to the sensations of a person who went outside; This allows you to dress for the weather.