lämpötilaanemometri

Lämpötilaanemometri refers to a type of anemometer that measures wind speed by utilizing the relationship between temperature and electrical resistance. These devices typically employ a heated sensor, often a thin wire or a thermistor. As air flows over the heated sensor, it cools the sensor down. The extent of this cooling is directly proportional to the speed of the airflow. The anemometer then measures the change in the sensor's electrical resistance, which is correlated to its temperature, and converts this measurement into a wind speed value.

There are two main types of temperature-based anemometers: hot-wire anemometers and thermistor anemometers. Hot-wire anemometers use a fine wire that is heated to a constant temperature or a constant current. The current required to maintain the constant temperature or the resulting temperature change is then measured to determine wind speed. Thermistor anemometers use a thermistor, a type of resistor whose resistance is highly dependent on temperature. Similar to hot-wire anemometers, the cooling effect of the wind changes the thermistor's resistance, which is then used to calculate wind speed. These anemometers are known for their sensitivity to low wind speeds and their ability to provide fast response times. They find applications in various fields, including meteorology, HVAC systems, and wind tunnel testing.