Digital Thermo-Hygrometer. Temperature range: -10 to 60 °C. Humidity range: 1 to 99 % rF. Displays maximum and minimum values. Dew point. Alarm function for mold risk. The electronic Comfort Control Thermo-Hygrometer is an ideal measuring instrument for monitoring indoor climate. Excessively humid air can harm health and promote the growth of mold and mildew. However, overly dry air can also negatively affect our well-being and health in various ways. Skin, mucous membranes, and respiratory organs are stressed, and pets, plants, wooden floors, and antique furniture also suffer. Comfortable climate. By actively heating and ventilating, you can achieve a pleasant and healthy living environment while even saving on heating costs. The ideal temperature and humidity levels in different rooms should be as follows: TFA Dostmann. With over 1000 weather and measuring instruments, the German company TFA Dostmann is one of the leading companies in the industry in Europe. The TFA range is characterized by its own innovative technologies and exclusive designs, continuously developed in collaboration with meteorologists, IT specialists, and designers.