The document outlines various methods and instruments for measuring air flow, including the Bernoulli equation, pitot tubes, inclined manometers, and anemometers. It details the use of differential pressure gauges and airflow hoods for measuring flow in ducts and through louvres. Specific equipment mentioned includes magnehelic pressure gauges and Dwyer differential pressure gauges for monitoring filter conditions.

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Air Flow
Measurement

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Bernoulli Equation
Ptotal = Pstatic + Pvelocity

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Pitot Tube

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Inclined Manometer

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Magnehelic Pressure Gauge

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Standard Manometer
Connections

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Measuring pressure in an air
duct or plenum

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Differential pressuring gauge
used to measure velocity pressure

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Hot Wire Anemometer

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Rotating Vane Anemometer

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Vane Anemometer Traverse

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Airflow Hood

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Airflow hood used to measure
flow through louvre

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Dwyer differential pressure gauges
used to monitor filter condition