Uf 831 CO/RV

The Uf 831 CO and Uf 831 RV flow meters have been designed for flow measurement of free surface flows. They are high performance devices and can integrate up to 8 speed chords and take into account 4 water height measurements. Versatile, the multi channel version can carry out 8 measurement points on 8 different outfalls with 1 single device and can integrate up to 10 Input/Output modules (analogue, digital, etc.). In addition, these devices have a graphic display and boast advanced functions (maths functions generator, multi-variable data logger, height/speed law degraded mode, possibility of integrating an external chord).

Nature of equipment

Fixed flow meter

Standard mounted inputs/outputs

3 to 6 mandatory base modules:

  • 1 isolated active analogue output: current 4-20mA, 0-20mA, 0-24mA,
  • 2 static relay digital outputs (50V – 10mA) usable on frequency outputs,
  • 2 isolated current inputs 4-20mA, 0-20mA, 0-24mA.

Optional inputs/outputs

Jusqu’à 7 modules à choisir parmi :

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


IP 67


Up to 0,5 %

Troubleshooting help

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


8 chords

Available models

  • Single channel
  • Multi-channel
  • River

Typical applications

  • Waste water: Measuring flow rate at purification plant intakes/outputs, measuring flow rate in combined or separate sewer systems, etc.
  • Raw water: Measuring flow rate in irrigation channels, measuring flow rate in rivers up to 500 m wide, measuring flow rate in rainwater harvesting networks, etc.

Download Uf 831 CO/RV datasheet

  • fluides_mesures_liquides

  • canaux_jusqua_30m

  • rivieres_jusqua_500m