VelociCalc Ventilation Meter

Manufacturer: TSI Incorporated
Part Number: 9555
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Product Details
The VelociCalc 9555 Multi-Function Ventilation Meter is a portable, hand held ventilation test instrument. This instrument is designed to work with a wide range of plug-in probes. The probes allow users to make various measurements by simply plugging in a different probe that has the features and functions best suited for a particular application. With the optional probes, measurements include air velocity, temperature, humidity, pressure, CO and CO2. Calculations include air flow, heat flow, turbulence, wet bulb and dew point temperature.

The probes can be ordered at any time and include a data sheet with certificate of traceability. When its time for servicing, only the probe needs to be returned since all the calibration data is stored within the probe. The 9555 model has a straight probe.

Features and Benefits

  • Best in class accuracy, especially in low flows
  • Displays up to 5 measurements simultaneously
  • Optional "smart" plug-in probes, including CO2 and rotating vane probes
  • Large graphic display
  • Manual or continuous data logging
  • TRAKPRO™ downloading software included
  • Name test IDs meaningful to you
  • Bluetooth® printer capability
  • Fast calibration and repair service - just send in the probe
  • Articulated probe version available (9555-A)


  • HVAC commissioning and troubleshooting
  • Clean room certification
  • Testing and balancing
  • Ventilation evaluations
  • Thermal comfort studies
  • IAQ investigations
  • Process air flow testing