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TSI 8371

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The TSI's Accubalance model 8371 air capture hood measures the air volume flowing through diffusers, and grilles. Weighing just 3.5kg, the Accubalance is easy to carry, lift, and use. Simply hold the instrument up to a diffuser or grill and read direct airflow of a supply or exhaust on the large digital display. Typical application include:-

• Air volume measurements • Thermal comfort studies • HVAC testing, system adjusting and balancing

Product Features

  • Document downloads
  • Instrument FAQs

Instrument product options



  • Variety of optional hood sizes
  • Sample and hold function displays reading of one sample
  • Automatic conversion between actual and standard flows when user initially inputs temperature and barometric pressure
  • Variable time constant
  • K factor function enables flexibility for measuring a variety of diffusers
  • Back-lit display
  • Compact carrying case for easy transportation

The optional hoods are supplied as a complete kit for the Instrument Solutions hire models. The hood sizes are as follows:-

610 mm x 1220mm (24 in.x 48in.), 305 mm x 1220mm (12 in.x 48in.), 305 mm x 1525mm (12 in.x 60 in.) and 915 mm x 915 mm (36 in.x 36 in.)


Flow range 15 to 1,000l/s (50 to 3,500m3/hr)

Accuracy ±5% reading and ±2.4 l/s

Operating temperature 0 to 60°C

Weight (standard hood) 3.5kg

Batteries 4 C size batteries

Battery life 40 hours continuous use

Carrying case 660 mm x 660 mm x 180 mm



TSI 8371 Accubalance data sheet

  • Technical Document
  • PDF file
  • 803 KB

TSI Accubalance 8371 user manual

  • Technical Document
  • PDF file
  • 510 KB

TSI K factor application note

  • Technical Document
  • PDF file
  • 255 KB



Is the Accubalance suitable for measiring flows in domestic applications ?


The Accubalance hood will accurately read as low as 15l/s. Below this flowrate, a flashing 0 will be displayed.  For very low flows such as those described in Part F of the Building Regulations there are more suitable hoods available, please call the Instrument Solutions team on 01344 459314 to discuss your requirements.

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