Airflow Measurement Tools

February 10, 2023 | Posted By: Degree Controls Inc.

Thousands of Degree Controls Rooster™ Airflow Monitors have been deployed throughout the world to monitor airflow in critical containment applications. When Facility Managers who have begun to install or commission a hood realize that they don’t have a handheld sensor, they contact us to purchase Rooster’s companion tool, the °C Point Anemometer. Other times, it’s laboratory managers who acquire the °C Point as a control tool to perform spot checks of cabinet performance.

°C Point is a calibrated thermal anemometer used for face velocity testing and inflow and downflow velocity measurements in controlled environments. Capable of measuring velocity with ± 3% accuracy, the handheld sensor is consistent with ANSI/ASHRAE 110 and NSF 49 standards for testing fume hoods and biosafety cabinets. If stand mounting is needed for grid point face velocity measurements, the °C Point’s universal ¼-20 mounting interface can be put to use.

Airflow Measurement Tools

There is more: Degree Controls has fog generators to complete fume hood/ASHRAE 110 testing setups and round out the tool sets used to determine biosafety cabinet performance. The °C Breeze and FlowMarker™ fogger instruments are used for smoke generation testing and airflow visualization studies in laboratories, cleanrooms, and other controlled environments. Portable and easy to use, handheld fog generators are designed to demonstrate air flow patterns. With a pressurized, tamper-proof fog fluid container to provide assurance of contamination-free testing, Flowmarker is the tool of choice for pharmaceutical professionals.

Contact Degree Controls today for tools to test, measure, and monitor your critical containment airflow.

Regular calibration and certification of the Rooster Airflow Monitor and primary containment device is essential for a safe work environment.


Degree Controls airflow measurement tools are used in the certification testing of cleanrooms, biosafety cabinets, and fume hoods. Controlled environment testing includes the following airflow tests: air changes per hour, airflow smoke pattern, airflow visualization, face velocity, downflow velocity profile, and inflow velocity.

Standards such as ISO14644-3 describe test methods for measuring the performance of a cleanroom, a clean zone or an associated controlled environment, as well as the test apparatus and airflow measurement tools.

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