#Hot wire anemometer sensor portable#

Thermo-Anemometer Air Velocity Sensors Probe Style Sensor

All three types have circuits that are based on trying to maintain a specific variable during the cooling effect based on Ohm’s Law. Thermo-anemometers offer good low flow detection, fast response times, and high rangeability of measurements. They are omni-directional, making them good for turbulent flows and easier to use than pitot tubes, but are more fragile than pitot tubes. Hot wire anemometers come in three basic types: constant current, constant voltage, and constant temperature. The name is derived from the Greek root Anemos, meaning wind. There are many anemometer sensor types with one of the most popular being thermo, or hot-wire, anemometers for HVAC air velocity monitoring. Thermo-anemometers use a sensor element that is heated up beyond the ambient temperature. Airflow moving past the sensor will have a cooling effect that is directly proportional to the flow velocity.

#Hot wire anemometer sensor portable#

There are fixed duct mount styles for continuous monitoring, such as the Air Velocity Transmitters, Series 641, and portable insertion styles for testing, such as the Thermo-Anemometer Test Instrument, Model 471B and the Thermo-Anemometer Probe, Series AP2.Īnemometers are instruments used to measure wind speed or air velocity in meteorology and aerodynamics.

Dwyer Instruments, Inc. offers many air velocity measuring products that use thermal or hot-wire sensors as the sensing element.