TSI Alnor

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  • Velocity
    • Pitot Probe & Air Flow Probe: 25 to 15,500 ft/min
    • Velocity Matrix: 25 to 5,000 ft/min
    • Accuracy: up to ±3% of reading ±7 ft/min
  • Pressure
    • Differential Pressure: ±15 in. H2O
    • Absolute Pressure: 15 to 40 in. Hg
    • Accuracy: up to ±2% of reading
  • Volume
    • Range: 25 to 2,500 ft3/min capture hood
    • Accuracy: up to ±3% of reading ±7 ft3/min
  • Relative Humidity
    • Range: 0 to 95% RH
    • Accuracy: ±3% RH
  • Temperature
    • Sensor in Base: 40 to 140°F
    • Temperature Probe: -40 to 250°F
    • Temperature/RH Probe: 14 to 140°F
    • Accuracy: up to ±0.5°F (±0.3°C)

The TSI Alnor EBT721 balometer is a multi-purpose electronic air balancing instrument for reading air volume flow at diffusers and grilles. It is ideally suited for commissioning agents, test and balance contractors, facilities managers, health and safety specialists and ventilation installers. The TSI Alnor EBT721 is a lightweight, ergonomically designed kit that saves time and money, while helping to create a healthy and energy efficient environment.

Designed for use with pitot, air flow, temperature, velocity matrix or relative humidity probes, the TSI Alnor EBT721 balometer also features a detachable digital manometer that can be used for other applications. Other features of the TSI Alnor EBT721 balometer include min, max and average for up to 1,000 readings, time and date stamped data storage (1,000 readings), a user-selectable logging interval and a response time of 2 to 8 seconds.

The 6-digit, multi-line display of the TSI Alnor EBT721 balometer also features large characters (19 mm) and symbolic icons which are displayed on a high-contrast backlit LCD. A ¼ inch (6.35 mm) straight port pressure connection is also included with the EBT721 and is designed for use with 3/16 inch (4.76 mm) ID flexible tubing.

The TSI Alnor EBT721 balometer ships complete with:

  • 2' x 2' air capture hood, frame and base
  • Manometer
  • Wheeled luggage-style carrying case
  • 18" pitot probe
  • 2 static pressure probes
  • Two 8' Norprene tubing
  • LogDat1 downloading software
  • Serial interface cable
  • Neck strap
  • Four AA rechargeable NiMH batteries
  • Internal charger
  • NIST calibration
  • Manual


TSI Alnor 800187 Air Flow Probe
18" (46 cm) air flow probe designed for use with the TSI Alnor EBT721 balometer
TSI Alnor 3002017 Static Pressure Probe
Static pressure probe designed for use with the TSI Alnor EBT721 and EBT731 balometers
TSI Alnor Pitot Probes
Various length Pitot probes designed for use with TSI Alnor instruments
In Stock

Power Supplies

TSI Alnor 801040 Power Cord
Power cord designed for use with the TSI Alnor EBT720, EBT721, 8710, 8375 and PH72 units


Please consider these optional accessories.

TSI Alnor Norprene Tubing
The TSI Alnor 372000000 Norprene tubing comes in an 8-foot (2.5 meter) length