Reverse flow detectionĮmprise anemometers include circuitry to detect reverse turbine rotation indicating reverse airflow. This yields better overall accuracy when compared to pinpoint measurements made with “hot wire” thermal type anemometers or differential pressure “pitot” probes. Turbine anemometers measure the average velocity over the area swept by the turbine. Advantages of Emprise Anemometers Better overall accuracy The turbine blade rotates on high precision ABEC 5 bearings that are easily replaceable if they become damaged or contaminated.
The anemometer turbine and support ring are machined from aluminum alloy billet using an extremely accurate 3D CNC machining process. The sensors also output a digital bit to indicate the direction of flow. Turbine speed is sensed by infrared sensors which output a TTL square wave signal at a frequency proportional to speed. As air passes through the anemometer, the turbine blade rotates at a speed proportional to the air velocity. The Emprise anemometer uses a helical turbine to measure air velocity. Whenever an accurate and wide-ranging flow measurement is required, Emprise turbine anemometers will provide years of reliable service. The design has proven ideally suited for a variety of air flow measurement applications including radiators, condensers, intercoolers and other heat exchangers, vehicle and building ventilation (HVAC) ducts, cabin airflow, engine compartment airflow, intake manifolds, brake cooling ducts, wind tunnels and under vehicle airflow. Over the past 30 years the Emprise anemometer has evolved into a precise and rugged instrument used in the automotive and aerospace industries as well as race teams over the world. Initial development was carried out at the Lockheed-Martin Low Speed Wind Tunnel.
The Emprise anemometer was originally developed in 1985 for mapping airflow of heat exchangers during vehicle wind tunnel testing.
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