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VelociCalc – Advanced Multi-Function Anemometers

VelociCalc – Advanced Multi-Function Anemometers



The Series 9555 are portable, hand held, Multi-Function Ventilation Test Instruments. These instruments are available with or without a differential pressure sensor and are 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. They are designed to measure air velocity, temperature, humidity, 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.

Features & 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.


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


Technical Specifications

Product Specifications Description
Data Storage Capabilities Range 26,500+ samples and 100 test IDs
Logging Interval 1 second to 1 hour
Time Constant User selectable
External Meter Dimensions 3.8 in. x 8.3 in. x 2.1 in. (9.7 cm x 21.1 cm x 5.3 cm)
Meter Weight with Batteries 0.8 lbs. (0.36 kg)
Meter Probe Dimensions Probe Length: 40 in. (101.6 cm)
Probe Diameter of Tip: 0.28 in. (7.0 mm)
Probe Diameter of Base: 0.51 in. (13.0 mm)
Articulating Probe Dimensions Articulating Section Length: 6.4 in. (16.26 cm)
Diameter of Articulating Knuckle: 0.38 in. (9.5 mm)
Power Requirements Four AA-size batteries or AC adapter