As the passing air reduces the heat of the wire, the device will need to pull more current to keep the temperature steady. Constant temperature method – These Hot Wire Anemometers work to keep the wire at a constant temperature.The device can measure wind speed from this change as the temperature is directly proportional to the airflow rate. Exposure of the heated wire to airflow will alter the temperature. Constant current method – A fixed current will flow to heat the wire. Hotwire anemometers determine the rate of cooling by either the constant current or the constant temperature method. Hot Wire Anemometers use the principle that the impact of wind will have a cooling effect on the wire. The hot wire anemometer calculates wind speed by determining the heat loss of the wire while the sensor is positioned in the wind stream to be measured. The anemometer heats the thin wire to a known set temperature, and as the wind passes over the wire, it will begin to cool. Temperature-Humidity Cabinets AccessoriesĪ Hotwire Anemometer usually consists of two probes with a small, thin wire stretched between them.Professional Weather Sensor Accessories.Spectrum Technologies Weather Station Sensors and Accessories.Dyacon Weather Station Accessories and Sensors.Davis Weather Station Software & Data Loggers.Cabled Davis Weather Station Accessories.Enviromonitor Gateway Integrated Sensor Suites (ISS).Hobo Outdoor Moisture-Temperature Loggers.Digital Insulation and Continuity Testers.Building Material & Timber Moisture Meters.
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