NIVUS GmbH

- Model CSM-V100 - Mini Correlation Sensor

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Ultrasonic sensors for flow measurement with very high accuracy in slight to heavily polluted media. For installation on channel wall or channel bottom

For high-accurate flow measurement by means of ultrasonic cross correlation method

  • Infiltration measurement (extraneous water)
  • Influent control
  • Billing measurement places
  • Discharge constructions
  • Precipitation discharge measurements

The Mini sensor family provides the best possible sensors to detect lowest flow levels e.g. for infiltration measurement (extraneous water) or indirect discharge measurement.
The sensors use the proven ultrasonic cross correlation method patented by NIVUS. This method allows to detect and to indicate flow profiles starting at flow levels as low as a few centimeters.

Due to their shape the sensors are particularly suitable for small geometries and help to avoid backwater effects, the risk of build-up and clogging.

  • Measurement campaigns in channel networks
  • Small WWTPs: intake and discharge
  • Industrial wastewater networks
  • Particularly suitable for channels featuring low flow levels

General

Flow Velocity Sensor, Type CSM

  • Measurement principle:
    • Ultrasonic Cross Correlation with digital pattern detection (flow velocity)
    • Piezo-resistive pressure measurement (level measurement)
  • Sensor types:
    • v-sensor with T-compensation
    • v-sensor with T-compensation and h measurement (hydrostatic)
  • Protection: IP 68
  • Ex-Approval: II 2 G Ex ib IIB T4 Gb
  • 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 (combi sensor with pressure cell max. 1 bar)
  • Cable lengths: 7 m, not extendable, for connection to the electronic box
  • Outside cable diameter:
    • Combi sensor with pressure measurement:: 9.75 mm ±0.25 mm
    • Sensors without pressure measurement: 8.4 mm ±0.25 mm
  • Sensor connection:
    • Cable end with plug for connection to Electronic Box EBM
    • Cable end with plug and pressure compensation element (sensors with pressure measurement cell only) for connection to Electronic Box EBM
  • Construction: Wedge sensor for installation on the channel bottom
  • Installation Options: In pipes starting at 150 mm diameter (sensor with pressure cell) or 160 mm (sensor without pressure cell + air-ultrasonic sensor Type DSM)
  • In channels with a minimum width of 100 mm
  • Medium-contacting materials:
    • Polyurethane, stainless steel 1.4571, PVDF, PA
    • Pressure compensationelement: POM-C, PMMA, PA, stainless steel 1.4571 (CSM-D only)

Flow velocity measurement

  • Measurement range: -100 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
  • Beam angle: ±5 degrees

Level measurement – Pressure

  • Measurement range: 0 to 500 cm
  • Zero point drift: max. 0.75 % of final value (0 – 50 °C)
  • Measurement uncertainty: standing medium:
  • +/- 0.5 of final value (within a range of 0.05 – 3.5 m)

Temperature measurement

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

Level Sensor, Type DSM

  • Measurement principle: ultrasonic - runtime
  • Measurement frequency: 120 / 200 kHz
  • Protection: IP 68
  • Ex-Approval: II 2 G Ex ib IIB T4 Gb
  • Operating temperature: -20 °C to +80 °C
  • Storage temperature: -30°C to +70 °C
  • Operating pressure: max. 1 bar
  • Cable lengths: 7/15 m to connect to electronic box, not extendable
  • Level measurement range: 0 to 200 cm
  • Dead zone (starting at mounting plate): 4 cm
  • Measurement uncertainty: < +/- 0,5% of measurement area bzw. +/- 5 mm of value (larger value counts)
  • Zero point drift: absolute zero point stable
  • Medium-contacting materials: Polyurethane, Stainless Steel 1.4571, PPO GF30, PA

Electronic Box, Type EBM (only for PCM Pro, PCM 4 and NivuFlow 750)

  • Protection: IP 68 (closed connectors)
  • Ex-Approval: II 2 G Ex ib IIB T4 Gb
  • Operating temperature: -20°C to+50 °C (+40 °C in Ex Zone 1)
  • Storage temperature: -30°C to +70 °C
  • Operating pressure: max. 1 bar
  • Cable lengths: 3, 10,20,30,50 or 100 m
  • Sensor connection: wire end to connect transmitter PCM 4 or PCM Pro
  • wire end to connect transmitter OCM Pro CF
  • Medium-contacting materials: Polyurethane, stainless steel 1.4571, PP

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