Air Velocity Meters

Airflow is a foundational control in life sciences. From ISO-classified cleanrooms to biosafety cabinets and sterile compounding areas, consistent velocity helps maintain directional flow, dilution, and capture across critical zones. TSI air velocity meters are built for these environments, bringing measurement fidelity, usability, and documentation features that support quality systems and repeatable results.

What You Can Measure

• Low-velocity laminar flow over work surfaces in cleanrooms and BSCs
• Inflow and downflow performance for cabinets and enclosures
• Face velocity at fume hoods and localized exhaust
• Diffuser discharge for HVAC commissioning and routine checks
• Room pressurization influence via airflow patterns at doorways and pass-throughs

Why TSI Meters Fit Life Sciences

• Sensitivity at low velocities: Thermal anemometer probes capture subtle flows commonly specified in ISO 14644 and NSF/ANSI 49 applications.
• Consistent readings: Fast response and temperature compensation help produce repeatable measurements across shifts and seasons.
• Practical ergonomics: Slim probes reach grilles, HEPA diffusers, and work zones without obstructing flow fields.
• Data you can use: Logging and export options help you trend results, attach evidence to protocols, and streamline reporting.

Selecting a Meter

• Thermal (hot-wire) anemometers: Ideal for low, laminar velocities and directional studies. Best for clean benches, BSC downflow/inflow, and cleanroom work zones.
• Vane anemometers: Useful for higher flows at supply/return grilles and ducts; they provide robust readings in turbulent streams.
• Combination kits: Pair thermal probes for sensitive areas with vane probes for HVAC points to cover the full facility.

Application Examples

• Commission a new ISO 7 cleanroom by mapping downflow velocities across work surfaces and at critical operations.
• Verify inflow and downflow of a Class II BSC against internal SOPs referencing NSF/ANSI 49 methodologies.
• Balance a pharmacy cleanroom suite by measuring supply diffuser velocities and confirming directional flow at doorways.
• Troubleshoot a fume hood with declining capture by trending face velocity versus sash position and fan speed.

Documentation and Workflow

• Standardize route-based measurements with consistent probe placement and dwell times.
• Log measurements with timestamps to support lot records, deviation investigations, and periodic review.
• Export data to common formats for LIMS, BMS, or quality documentation repositories.

Service and Calibration

• Routine calibration helps maintain measurement confidence and traceability. TSI offers factory service and calibration that align with quality program requirements, including certificates traceable to recognized standards.

Best Practices

• Stabilize environmental conditions where possible before measurement.
• Position probes with minimal disturbance to local flow fields.
• Use appropriate probe orientation and dwell time per method or SOP.
• Document probe IDs and calibration dates in test records.

TSI air velocity meters help life science teams work efficiently and with confidence. Whether you are validating a cleanroom, certifying a BSC, or balancing HVAC to a new production schedule, these tools deliver the performance, ergonomics, and data needed to support compliance objectives and continuous improvement. Connect with our team to match a meter and probe configuration to your facility’s specific airflow ranges, layouts, and SOPs.