Uf 821 CO/RV

This latest generation ultrasound flow meter has a graphic display and boasts advanced functions (maths functions generator, multi-variable data logger, height/speed law degraded mode, possibility of integrating an external chord, etc.). Complete and reliable, the Uf 821 CO and Uf 821 RV use a calculation method compliant with ISO standard 6416 and a diameter definition in 20 points height/width and 20 points left/right.

Nature of equipment

Fixed flow meter

Width of channel/river

  • Channels up to 30m (width)
  • Rivers up to 300m (distance between banks)

Standard mounted inputs/outputs

2 isolated current inputs 4-20mA, 0-20mA, 0-24mA (single module)*

* For 4 channels, 2 modules are required (4 inputs)

Optional inputs/outputs

Up to 3 single modules to choose from:

  • 1 isolated, active analogue output: current 4-20mA, 0-20mA, 0-24mA,
  • 2 static relay output s usable as frequency outputs ( up to 1kHz),
  • 2 isolated, passive current inputs 4-20mA, 0-20mA, 0-24mA,
  • 2 isolated, passive analogue 0-10V inputs: 0 t o 15V voltage,
  • 2 PT100/PT1000 temperature inputs – taking up the physical space of 2 modules,
  • 2 contact 5 V inputs (pulse or state).


IP 67


Up to 0,5 %

Troubleshooting help

  • Oscilloscope function (echo displayed)
  • Gain
  • Quality index

Maximum number of speed chord

4 chords

Available models

  • Single channel
  • Mutli-channel
  • Rivier

Typical applications

  • Waste water: Measuring flow rate in sewage systems, at purification plant intakes/outputs, in small channels, etc.
  • Raw water: Measuring flow rate in irrigation channels, rivers or streams, etc.

Download Uf 821 CO/RV datasheet

  • fluides_mesures_liquides

  • canaux_jusqua_30m

  • rivieres_jusqua_300m