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Observator 100 years

TA500 Multi-function / Air Velocity Meter

The Airflow™ Instruments Velocity Meter TA500 is a portable, handheld Multi-Function Ventilation and IAQ test instrument featuring a menu-driven user interface for easy operation. The high-resolution color screen displays multiple measurements simultaneously in real-time with on-screen prompts to guide you through instrument setup and operation.

The Airflow™ Instruments Velocity Meter TA500 is designed to work with a wide range of plug-in probes for measuring air velocity, temperature, relative humidity, CO and CO2. Its ergonomic design includes a probe holder and integrated magnets allowing for attachment to exposed ductwork or other metallic surfaces for hands-free operation. The Model TA500 includes a built-in workflow for calculating the percentage of outside air used to determine ventilation effectiveness in a building or room when used with an IAQ probe.

Features and benefits

  • Large, high-resolution color display
  • Intuitive menu structure allows for ease of use and setup
  • Optional smart plug-in probes, including thermoanemometer, rotating vane and CO2 probes with calibration certificates
  • Input for one K-alloy thermocouple
  • User-customizable soft keys for quick access to common functions
  • Calculate the percentage of outdoor air with IAQ probe
  • Integrated magnets for hands-free operation
  • Supports multiple languages
  • Air density compensation with on board barometric pressure sensor and temperature input
  • Print data from instrument with optional USB portable printer (802241)



  • HVAC testing and balancing
  • Clean room testing
  • Biological safety cabinet and laboratory fume hood testing
  • HVAC commissioning and troubleshooting
  • IAQ investigations
  • Ventilation effectiveness with percent outside air calculation

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