Which device is commonly used to measure air velocity in duct systems?

Which device is commonly used to measure air velocity in duct systems?

• A. Velometer
• B. Anemometer
• C. Anemograph
• D. Thermometer

Answer: (B)

Measuring air velocity in duct systems is essential for balancing and ensuring proper airflow. An anemometer is the instrument designed to measure the speed of moving air. It’s used by inserting it into the duct or placing it in the airstream to give a direct reading of velocity, and you can use that value with the duct area to calculate volumetric flow if needed. Different forms exist, like vane, hot-wire, or pitot-type probes, but the common purpose is to quantify how fast air is moving. A velometer is not the standard tool for duct measurements, and an anemograph records velocity over time rather than providing an instantaneous reading in the field. A thermometer measures temperature, not velocity. So the device that’s most commonly used to measure air velocity in duct systems is the anemometer.

Measuring air velocity in duct systems is essential for balancing and ensuring proper airflow. An anemometer is the instrument designed to measure the speed of moving air. It’s used by inserting it into the duct or placing it in the airstream to give a direct reading of velocity, and you can use that value with the duct area to calculate volumetric flow if needed. Different forms exist, like vane, hot-wire, or pitot-type probes, but the common purpose is to quantify how fast air is moving.

A velometer is not the standard tool for duct measurements, and an anemograph records velocity over time rather than providing an instantaneous reading in the field. A thermometer measures temperature, not velocity. So the device that’s most commonly used to measure air velocity in duct systems is the anemometer.