How To Understand Sensors for Air Velocity

Air velocity sensors can come in all shapes and sizes depending on what and how it will be used. These sensors are commonly used to measure air velocity and air pressure. A common use for the air velocity sensors is to maintain the integrity of the air within a building or a factory. Here's how to know some of the available types of air velocity sensors with a short description of each.

  1. Lightweight handheld. Handheld air velocity sensors are usually lightweight and are very portable so you can take with you anywhere. These anemometers can have a cup vane system attached to the top part which is very sensitive to the wind, but it won’t matter much to the cup vane anemometer in which direction the wind is blowing. The handheld anemometer is digital and features a large enough LCD window to see the readings. There are several units of measurements to choose from so you can take readings in km/h, ft/min, m/s, miles/h or knots. They are usually made of plastic and powered by batteries. Other types of handheld anemometers may feature memory that readings can be stored on and through an interface you can connect the sensor to the computer and save your readings on your hard disk, facilitated by the accompanying software.
  2. Windmill air velocity sensors. Also known as a propeller anemometer, this type of sensor can take velocity readings but has to change along with the direction of the wind. Its physical features looks somewhat like a small airplane. Attached to a pole, the windmill sensor is parallel to the ground and has a propeller at one end and a rudder type tail on the other to help it move to the direction of the wind.
  3. Air duct and pipes. In places where the direction or flow of the air will always be constant, like pipes and air ducts, sensors can also be attached to measure air velocity. One type of sensor which is called a gauge is attached through the pipes or air ducts and another sensor called a bolometer is attached either at the source of the air flow or at the end or exhaust. Then measurements can be taken from both sensors to measure the air velocity. These sensors are durable enough to handle strong air flows.

Air velocity sensors are vital devices to factories and plants that manufacture medicine, cosmetics, food, and other products that must be in a sterile environment. These sensors are used to track the airflow of dirty or contaminated air in and around sterile areas of the manufacturing plant. Most sensors used in these areas will have alarms to notify workers if the air has been contaminated.


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