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
Measurement principle	Correlation with measurement of the real flow profile
Measurement frequency	1 MHz
Protection	IP 68
Ex-Approval	II 2G Ex ib IIB T4 Gb (ATEX) Ex ib IIB T4 Gb (IECEx)
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)
Medium-contacting materials	Polyurethane, stainless steel 1.4571, PPO GF30, PA Pressure compensationelement: POM-C, PMMA, PA, stainless steel 1.4571 (CSM-D only)
Flow velocity measurement
Measurement range	−350 cm/s to +600 cm/s
Max. Measuring span	Δ 700 cm/s
Quantity of scan layers recorded and computed	max. 32
Zero point drift	absolutely stable zero point
Error limits (per scan layer)	< 1 % of measurement value (v > 1 m/s) < 0.5 % of measurement value +5 mm/s (v < 1 m/s)
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	≤ 0.5 % of final value
Temperature measurement
Measurement range	−40 °C to +80 °C
Measurement uncertainty	±0.5 K

Specifications subject to change.

Specifications subject to change.

Technical Instructions | Correlation Sensors and external Electronic Box (Rev. 12)

download file
PDF 7 MB

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

download file
PDF 4 MB

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

download file
PDF 187 KB

IECEx Certificate of Conformity Sensor Family Mini and Transit Time Sensors

download file
PDF 770 KB

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