Air Flow Measurement

How to measure air velocity in a duct.

Air flow measurement.

Airflow or air flow is the movement of air. When selecting an airflow measurement instrument it is important to consider your application. We include examples of manufacturer s air flow rate or cfm data for hvac equipment like air conditioners and furnaces. Air flow measurement instruments anemometers have been limited in the past by time.

Depending on the type of application the air flow meter is made as a hot wire air flow meter a vane air flow meter a cup anemometer a pitot tube air flow meter or a pocket weather flow meter all of which can measure air velocity as well as air pressure. Achieve precision flow measurement and process control flow measurement is the process of measuring fluid in your plant or industry. An air flow meter measures air velocity as well as air pressure. This article defines air flow rate or cubic feet per minute cfm as the term is used to describe building air conditioners heating systems or building air movement rates.

The newest microprocessor based instruments complete duct hvac air flow measurement data collection accurately even before the patience of the hvac tech wears out. We offer two methods of hvac air flow measurement differential pressure and thermal dispersion giving you the option to choose how you measure your hvac air flow. How to measure velocity of air. Atmospheric difference atmospheric air pressure is directly related to altitude temperature and composition.

The newest microprocessor based anemometers complete duct air flow measurement data collection accurately even before the patience of the hvac tech wears out. Make sure air is not able to escape from the top of the hood as this will make your air flow measurement less accurate. Measuring air flow with anemometers has been limited in the past by time. Some can even detect the wind direction.

It will look like a square or rectangular piece of metal with slats running across it. Read the screen on the bottom of the hood to get your measurement. Using the right tools and the right process can simplify what may otherwise seem a daunting process. The primary cause of airflow is the existence of air.

Especially with respect to iaq requirements for minimum ventilation of occupied spaces the need for accurate reliable air flow measurement is a must have. Air flow rate data. You ll typically find the exhaust fan grille on the ceiling. Air behaves in a wave like manner meaning particles naturally flow from areas of higher pressure to those where the pressure is lower.

Airflow instruments are accurate high quality professional grade instruments used by a wide range of customers including building service contractors commissioning specialists facility engineers and research professionals. You can measure flow through a variety of different devices such as coriolis differential pressure vortex magnetic ultrasonic turbine and positive displacement meters.