- Model POA-V2XXR - Correlation Pipe Flow Sensor



Cross correlation sensors for flow velocity and level detection in part filled and full pipes and channels. For installation in pipes  Medium measurement range for levels up to ca. 1m. Cross correlation sensors for flow velocity and level detection in part filled and full pipes and channels. For installation in pipes. POA flow velocity sensors are suitable for continuous measurement of slight to heavily polluted media. The pipe-shaped sensors are designed for installation in pipes from the outside using a nozzle. Combined with transmitter types such as NivuFlow 750 and an external level measurement the result is a complete flow measurement system.

  • For high-accurate flow measurement of ultrasonic cross correlation method
  • Interference-free connection over long distances through digital signal transmission
  • Cables can be extended without any problems using standard cables
  • Absolutely stable zero point and drift-free
  • Measurement in heavily polluted and abrasive media
  • Easy installation without additional constructions and perfectly matched mounting accessories
  • Installation under process conditions possible
  • Suitable for all channel cross sections

  • Stormwater treatment plants: flow measurements and control of the discharge to the WWTP
  • Wastewater treatment plants: intake, discharge, activated sludge tank intakes, return sludge, recirculation, surplus sludge, digester discharge and flocculant dosage
  • Direct discharge control, infiltration (extraneous water) or leakage detection
  • Industrial wastewater networks
  • and many more


  • Measurement principle:
    • Ultrasonic Cross Correlation with digital pattern detection (flow velocity)
    • Ultrasonic transit time (level measurement)
  • Sensor types:
    • v-sensor with T-compensation
    • v-sensor with T-compensation and h measurement (water-ultrasound)
  • Ex-Approval:
    • II 2 G Ex ib T4 Gb (ATEX)
    • Ex ib IIB T4 Gb (IECEX)
  • Operating temperature:
    • -20 °C to +50 °C
    • -20 °C to +40 °C if using the sensors in Ex Zone 1
  • Storage temperature: -30 °C to +70 °C
  • Operating pressure: max. 4 bar
  • Cable lengths: 10/15/20/30/50/100 m pre-configured, can be extended upon request
  • Cable types: LiYC11Y 2 x 1.5 + 1 x 2 x 0.34
  • Outside cable diameter: 8,4 mm ±0,25 mm
  • Sensor connection:
    • Cable end pre-configured for connection to NFP and OCM CF
    • Cable end with plug for connection to PCM 4 and PCM Pro
  • Medium-contacting materials: Polyurethane, stainless steel 1.4571, PPO GF30, PTFE
  • Optional: sensor resistant to chemicals made of PEEK, sleeve made of Hastelloy C-276; cable with FEP coating

Flow velocity measurement

  • Measurement range: -600 cm/s to +600 cm/s
  • Number of scan layers: max. 16
  • Measurement uncertainty: for 0.05≤|V|≤0.5 m/s: E_v=0.5/|V| [%]
  • Zero point drift: absolutely stable zero point
  • Number of sensors: 1 to 3 per transmitter
  • Beam angle: ±5 degrees

Level measurement water-ultrasonic sensor

  • Measurement range: 0.05 to 200 cm
  • Zero point drift: Absolutely stable zero point
  • Measurement uncertainty: +/- 2.0 mm or 0.2% of the measured range (whichever is greater)

Temperature measurement

  • Measurement range: -20 °C to +60 °C
  • Measurement uncertainty: ±0.5 K

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