Flow Sensors

Mini Correlation Sensor

Part No. CSM-V100

Measurements starting at flow levels of 3 cm

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.

Typical applications for Mini sensors

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

 

    Common
    Flow Velocity Sensor, Type CSM
    Measurement principleUltrasonic Cross Correlation with digital pattern detection (flow velocity) Piezo-resistive pressure measurement (level measurement)
    Sensor typesv-sensor with T-compensation v-sensor with T-compensation and h measurement (hydrostatic)
    ProtectionIP 68
    Ex-ApprovalII 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 pressuremax. 4 bar (combi sensor with pressure cell max. 1 bar)
    Cable lengths7 m, not extendable, for connection to the electronic box
    Outside cable diameterCombi sensor with pressure measurement: 9.75 mm ±0.25 mm Sensors without pressure measurement: 8.4 mm ±0.25 mm
    Sensor connectionCable 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
    ConstructionWedge sensor for installation on the channel bottom
    Installation OptionsIn 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 materialsPolyurethane, 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 layersmax. 16
    Measurement uncertainty for 0.05≤|V|≤0.5 m/s: E_v=0.5/|V| [%]
    Zero point driftabsolutely stable zero point
    Beam angle±5 degrees
    Level measurement – Pressure
    Measurement range0 to 500 cm
    Zero point driftmax. 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

    Specifications subject to change.

    Level Sensor, Type DSM
    Measurement principleultrasonic - runtime
    Measurement frequency120 / 200 kHz
    ProtectionIP 68
    Ex-ApprovalII 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 pressuremax. 1 bar
    Cable lengths7/15 m to connect to electronic box, not extendable
    Level measurement range0 to 200 cm
    Dead zone (starting at ground plate)4 cm
    Measurement uncertainty < +/- 0,5% of measurement area bzw. +/- 5 mm of value (larger value counts)
    Zero point driftabsolute zero point stable
    Medium-contacting materialsPolyurethane, Stainless Steel 1.4571, PPO GF30, PA

    Specifications subject to change.

    Electronic Box, Type EBM
    ProtectionIP 68 (closed connectors)
    Ex-ApprovalII 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 pressuremax. 1 bar
    Cable lengths3, 10,20,30,50 or 100 m
    Sensor connectionwire end to connect transmitter PCM 4 or PCM Pro wire end to connect transmitter OCM Pro CF
    Medium-contacting materialsPolyurethane, stainless steel 1.4571, PP

    Specifications subject to change.

    Technical Instructions Correlation Sensors

    Instruction Manuals / Technical Information English

    Technical instructions for correlation sensors and external electronic box

    Installation Instruction for Correlation and Doppler Sensors

    Instruction Manuals / Technical Information English

    Installation instruction for save installation 

    EU-Declaration of Conformity External Electronic Box EBM

    Certificates German English

    Externe Elektronikbox EBM

    EU-Declaration of Conformity "EX" External Electronic Box EBM

    Certificates German English

    "Ex" externe Elektronikbox EBM

    EU-Declaration of Conformity Ultrasonic Sensors CSM/DSM

    Certificates German English Spanish

    Ultraschallsensoren CSM/DSM

    EU-Declaration of Conformity "EX" Ultrasonic Sensors CSM/DSM

    Certificates German English Spanish

    "EX" Ultraschallsensoren CSM/DSM

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      Overvoltage Protection Unit

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