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3230 Industrial Way, SW | Suite B | Snellville, GA 30039       (800) 474-2490

    TSI Velocicalc 9545-A Velocity and IAQ Meter/Logger

    The VELOCICALC® Air Velocity Meter 9545-A is like having multiple meters for the price of one. This meter simultaneously measures and data logs several ventilation parameters using a single probe with multiple sensors. It measures velocity, temperature and relative humidity; and calculates flow, wet bulb and dew point temperature. Ideal for optimizing HVAC system performance, commissioning, plant maintenance, critical environment certification and duct traverses. The 9545 model has an articulated probe.


    • Simple to operate
    • Accurate air velocity measurement 0 to 6,000 ft/min (0 to 30 m/s) range
    • Calculates volumetric flow, and actual/standard velocity
    • Displays humidity as % relative humidity, wet bulb or dew point temperature
    • Displays up to three measurements simultaneously
    • Data log 12,700+ samples and 100 test IDs
    • Straight probe version available (9545)

    TSI Velocicalc 9555-Multifunction IAQ Meter

    The VelociCalc 9555-A 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. Frequently used for; HVAC commissioning and troubleshooting, Clean room certification, Testing and balancing, Ventilation evaluations, Thermal comfort studies, IAQ investigations, and Process air flow testing.


    • 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
    • Straight probe version available (9555)

    IAQ Meter Calibrator

    The Zefon Bio-Pump is a small,  and lightweight, portable battery powered IAQ sampling pump. It provides the simplest and most convenient way to sample with Air-O-Cell and Via-Cell cassettes at a flow rate of 15LPM.


    • 'Quick Sample' feature 
    • Extra Long Battery Life - Take over 100 samples on a single charge
    • Very small size and weight - Over 40% less than the standard Zefon Bio-Pump
    • Very quiet operation
    • Programmable timer allows unattended operation
    • Quick-charge battery charger included (approx 3 hours)
    • Uses Air-O-Cell cassettes - the only industry proven and standardized sampling cassettes
    • Uses Via-Cell cassettes - the only cassette style sampler offering both viable and non-viable analysis options
    • Nothing to prepare or clean. Just place the cassette on the pump, set the time and go


    • Flow Rate: 15 LPM
    • Housing: ABS
    • Housing Color: Black
    • Battery: Nickel Metal Hydride
    • Sampler Size: 4.375" width; 8" depth; 2.75" height
    • Weight: 1.6lbs
    Item # Description/Size Availability Qty Break Price Quantity
    Rental: TSI QTRAK IAQ Meter, Temp/Humidity/C0/C02 Daily: $55, Weekly: $165, Monthly: $495
    1-Day Rate 1 $55.00
    Rental: TSI Air Velocity Meter, Temp/Humidity Daily: $50, Weekly: $150, Monthly: $450
    1-Day Rate 1 $50.00