Airflow Instruments Velocity Meters

Sensitive, Stable Velocity Measurement

Accurate low-velocity measurement is essential for validating laminar flow and verifying hood face velocities. Velocity meters — especially thermal hot-wire designs — offer the sensitivity and resolution needed for these tasks. Their slim probes reach tight planes, while fast response times help capture stable averages in variable conditions.

Core Capabilities

• Low-Velocity Sensitivity: Resolve airspeeds typical of clean benches and cabinets.
• Temperature Compensation: Improve accuracy across changing conditions.
• Slim, Articulating Probes: Access critical measurement planes without obstruction.
• Data Logging and Averaging: Produce reproducible results for reports.
• Rugged Portability: Built for frequent use across large facilities.

Applications

• Laminar Flow Verification in Clean Benches
• Biosafety Cabinet and Fume Hood Face Velocity Checks
• Room Airflow Pattern Characterization
• HEPA Filter and Terminal Diffuser Assessments
• Commissioning, Recertification, and Troubleshooting

Buying Considerations

• Accuracy at Target Velocity Range: Review uncertainties below 100 fpm.
• Probe Geometry and Length: Fit your equipment and measurement locations.
• Response Time and Averaging: Balance speed with stability.
• Interface and Data Handling: Support your reporting format and SOPs.
• Calibration Plan: Maintain traceability to meet quality requirements.

Tips for Repeatable Results

• Use consistent grids and dwell times across measurements.
• Minimize disturbances near the test plane.
• Stabilize equipment (fans, doors) before recording readings.
• Document environmental conditions to aid interpretation.

Not sure which probe style fits your application? Contact us for guidance on velocity meter configurations and accessories.