Flow Sensors

CSM 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

[Translate to English:] CSM-D - Keilsensor mit integrierter Füllstandsmessung

[Translate to English:] Füllstandmessung für Minisensor

[Translate to English:] Elektronikbox für Minisensoren

[Translate to English:] Durchflussmessung Fließprofildarstellung

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 principle	Ultrasonic Cross Correlation with digital pattern detection (flow velocity) Piezo-resistive pressure measurement (level measurement)
Protection	IP 68
Ex-Approval	II 2 G Ex ib IIB T4 Gb
Operating temperature	Wedge sensor without hydrostatic level measurement −20 °C up to +70 °C for up to 15 min operating time −20 °C up to +65 °C when used continuously −40 °C up to +80 °C when used in Ex Zone 1 Wedge sensor without hydrostatic level measurement −20 °C up to +50 °C −40 °C up to +80 °C when used 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	7/15 m, not extendable, for connection to electronic box / NivuFlow Mobile 750 20 m (sensor with pressure cell only)
Outside cable diameter	Combi sensor with pressure measurement: 9 mm ±0.25 mm Sensors without pressure measurement: 6 mm ±0.2 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
Sensor types	v-sensor with T-compensation v-sensor with T-compensation and h measurement (hydrostatic)
Construction	Wedge sensor for installation on the channel bottom
Max. Measuring span	Δ 700 cm/s
Quantity of scan layers recorded and computed	max. 32
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
Measurement uncertainty	for 0.05≤\|V\|≤0.5 m/s: E_v=0.5/\|V\| [%] for \|V\|>0,5 m/s: E_v=1 %
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

Specifications subject to change.

Specifications subject to change.

Technical Instructions | Correlation Sensors and external Electronic Box (Rev. 11)

download file
PDF 7 MB

Mounting Instruction | Correlation and Doppler Sensors (Rev. 08)

download file
PDF 4 MB

Declaration of Conformity "Ex" ultrasonic sensors CSM / CSP / DSM / OCL-LM

download file
PDF 240 KB

IECEx Certificate of Conformity Sensor Family Mini and Transit Time Sensors

download file
PDF 154 KB

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