TSI 9565 VelociCalc Multi-Function Ventilation Meter

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TSI's VelociCalc 9565 ventilation meters are portable, handheld, multifunction ventilation test instruments, available to work with a variety of smart plug-in probes, including volatile organic compounds (VOCs in PPB or PPM), CO2, and rotating vane probes.

VelociCalc 9565 model kit includes meter and 962 straight probe for air velocity and temperature.

The TSI VelociCalc 9565 series multi-function ventilation meter provides a flexible system to meet your ventilation testing needs. Key appications include HVAC testing and balancing, clean room testing, HVAC commissioning, troubleshooting, and evaluation, thermal comfort studies, IAQ investigations, and process air flow  testing.

The handheld meter has a menu-driven user interface with on-screen prompts and step-by-step instructions to guide you through setup, operation, and calibration.

  • Measuring ranges (probe-dependent): 250-15,500 ft/min air velocity, 0-500 ppm CO, 0-5000 ppm CO2, low (ppb) or high (ppm) concentration ranges for VOCs, and 0°-200°F temperature (-40° to 1200°F with thermocouple probe)
  • Displays up to five measurements simultaneously on large LCD display
  • Calculates air flow, heat flow, turbulence, wet bulb and dewpoint temperatures
  • Bluetooth communications for transferring data or remote polling applications (except on -NB model)
  • Manual or continuous datalogging function with capacity for more than 26500 samples and 100 test IDs
  • TrakPro and LogDat software included for transferring data to a PC and analyzing your results
  • Upgrade from the TSI VelociCalc Plus 8386 TSI VelociCalc 9555

Model Selection Guide

Use this table to find the right model for your application.  Don't see the option you need? Call a Lesman sales specialist at 800-953-7626.

All kits include instrument, one 8-foot rubber tube, one static pressure tip, four Alkaline batteries, universal power supply, USB cable, LogDat2 and TrakPro software, instruction maual, calibration certificate, and hard carrying case.


Measurement Click for Price and Availability
Air Velocity0-9999 Ft/Min0-9999 Ft/Min0-9999 Ft/Min Order probe
as needed.
Temperature0° to 200° F0° to 200° F0° to 200° F
Humidity5 to 95% RH5 to 95% RH5 to 95% RH
Differential Pressure-15" to 15" H2O-15" to 15" H2O-15" to 15" H2O-15" to 15" H2O
Barometric Pressure20.36" to 36.648" Hg20.36" to 36.648" Hg20.36" to 36.648" Hg20.36" to 36.648" Hg
Type K Thermocouple Input2 Included 2 Included 2 Included 2 Included
Included Sensor 964 Straight Probe
dP Sensor
964 Straight Probe
dP Sensor
966 Articulated Probe
dP Sensor
dP Sensor Included
Model 9565
(Order Above)
9565-NB 9565-A 9565-P
More Information
Measuring Range Depends on model and probe
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