TSI / Alnor LoFlo | Balometer

Contact Instrument Solutions

The TSI / Alnor LoFlo balometer is the ideal way to measure very low volumetric flow. Confidently and accurately measure supply or extract flows from 4.7 to 236 l/s (17 to 850 m/ h).

This light weight instrument is designed for domestic or light commercial use, and comes in three different variants with optional hood kits for different sized apertures.


  • 3 different hood options available 
  • Weighs only 3 kg with the hood attached
  • Simulated analog display shows air trends and digital readings
  • Uses C size alkaline batteries; minimum 10 hours continuous use (4x supplied)
  • For small diffusers, the base can be used without a hood


Air velocity range      4.7 to 236 l/s (17 to 850 m/ h)

Air velocity accuracy       ± 3 % + 2.4 l/s

Height      Base 394 mm, with 406 mm x 406 mm hood 460 mm or 200 mm tall and 610 mm x 610 mm hood 876 mm

Weight      3 kg with hood attached

Base opening diameter      338 mm diameter

Resolution       0.1 l/s from 4.7 to 9.9 l/s, 1 l/s from 10 to 236 l/s

TSI / Alnor LoFlo hire kit | Balometer
TSI / Alnor LoFlo hire kit | Balometer
Available to hire from BSRIA Instrument Solutions is the Alnor LoFlo balometer complete with a 406 mm x 406 mm and 610 mm x 610 mm hood, batteries, case, manual and calibration certificate.
TSI / Airflow PH731 | Balometer
TSI / Airflow PH731 | Balometer
Available to hire and buy from Instrument Solutions is the TSI / Airflow PH731 electronic balometer, comprises of meter (PH731), handle, batteries, PSU, base unit, 610 mm x 610 mm hood kit, swirl X flow conditioner, 450 mm pitot tube, x2 static pressure tubes, tubing, case, USB link lead, software CD and manual

Support documents

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Alnor LoFlo user manual.pdf Alnor LoFlo user manual
Technical document
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Adobe Acrobat
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