digital thermometer is an electronic device used to measure temperature. It typically consists of a temperature sensor, which may be a thermistor or a thermocouple, and a display unit that shows the temperature reading. Digital thermometers are commonly used in medical settings to measure body temperature, but they are also used in industrial and scientific applications. A hygrometer is an electronic device used to measure humidity. It typically uses a humidity sensor, which may be a capacitive, resistive, or thermal sensor, and a display unit that shows the humidity reading. Hygrometers are commonly used in meteorology, agriculture, and indoor environments to monitor humidity levels. Some digital thermometers also come with a hygrometer built-in, allowing them to measure both temperature and humidity simultaneously. This can be particularly useful in applications such as indoor climate control, where both temperature and humidity are important factors in maintaining a comfortable and healthy environment.