Air movement testing equipment detects and measures the flow of air across their sensors and helps configure ventilation systems. Air velocity meters measure the speed of air passing by their measurement points. Air velocity meter and anemometer accessories enhance the capabilities of air velocity meters and replace damaged or worn components. Air velocity indicators and labels are applied to ventilation systems and visually identify the direction and approximate speed of airflow in the system. Air velocity transmitters connect to ventilation systems at specific points and transmit their readings to a control or monitoring system. Air flow capture hoods channel moving air that is not contained in a ventilation system down to calibrated sensors to measure the air velocity.