Our range of ultrasonic velocity profiling sensors is based on a patented cross-correlation technology developed by the manufacturer Nivus. This technology allows the measurement of flow rates in open channels, full and unfilled pipes, with a high degree of accuracy, especially in comparison to the widely used Doppler technology.
This range includes several models to cover all needs depending of the specific features of the facilities to be equipped.
Different versions and shapes are available, depending on the model:
- Wedge/hydrodynamic (sensors installed on a channel or pipe wall, or on channel bottom)
- Cylindrical (sensors inserted into the pipe, flush with the surface, particularly useful for full pipes)
- Tubular (sensors especially designed for installation in partially filled channels with perpendicular walls)
These sensors can be supplied with a level sensor integrated in the same housing or mounted separately.
They can be combined with NivuFlow 750 or 7550 transmitters to form a complete flow measurement system, either stand-alone or connected to an existing control system (SCADA, telemetry) for permanent installation or measurement campaigns.
Applications
- Slightly to heavily-polluted fluids, in open channels or full or partially filled pipes
- Sewer networks, Pumping stations
- Wastewater treatment plants: inlet, outlet, aeration tank outlet, sludge recirculation, sludge treatment, fermenter outlet, flocculent dosages
- Diagnosis, infiltration or capacity studies
- Direct control of discharges, secondary water inflows and leakage flow monitoring
- Overflow events monitoring
- Stationary measures in rainfall retention structures such as stormwater, retention or pollution control basins
- Industrial water networks
- Metering to determine billing charges
- Drainage pipes
- Sludge recycling lines
Main benefits
- High measurement accuracy thanks to cross-correlation velocity profiling technology
- No calibration required
- Self-adaptation to variations in velocity profiles and hydraulic disturbances
- Visualization of 3D velocity profiles (see NivuFlow 750 and 7550 converters)
- Flexibility to adapt to different needs (channel and pipe dimensions, full or partially filled pipes, required level of accuracy, etc.)
- Multi-sensor capability for very large pipes or channels, or for system redundancy
- Can be installed without stopping the flow, without intervention in the environment, and without additional mounting equipment such as spring rings or mounting plates (insertion cylindrical sensors)
- Absolute zero-point stability (no drift)
- Insensitive to interference over long distances thanks to digital signal transmission
Specifications
HYDRODYNAMIC, CYLINDRICAL AND TUBULAR MODELS
- Hydrodynamic/wedge sensors: wall or bottom installation, in channels or partially filled pipes
- Cylindrical pipe sensors: insertion, flush-mount installation in solid pipes
- Tubular sensors: side-mounted installation in open rectangular channels
AVAILABLE SENSOR TYPES
-
POA sensors
Connection to NivuFlow 750 and 7550 converters
— POA-V200K: Velocity only, no level measurement, hydrodynamic
— POA-V200R: Velocity only, no level measurement, cylindrical
— POA-V2H1K: Velocity + Ultrasonic level from bottom, hydrodynamic
— POA-V2D0K: Velocity + Pressure level, hydrodynamic
— POA-V2U1K: Velocity + Ultrasonic level from bottom + Pressure level, hydrodynamic -
CS2 sensors (for large structures)
Connection to NivuFlow 750 converters
— CS2-V100R: Velocity only, no level measurement, cylindrical
— CS2-V100S: Velocity only, without level measurement, tubular
— CS2-V200K: Velocity only, no level measurement, hydrodynamic
— CS2-V2H1K: Velocity + Ultrasonic level from bottom, hydrodynamic
— CS2-V2D0K: Velocity + Pressure sensor, hydrodynamic
— CS2-V2U1K: Velocity + Ultrasonic level from bottom + Pressure sensor, hydrodynamic -
CSP sensors (for large structures)
Connection to NivuFlow Mobile 750 and NivuFlow Stick converters
— CSP-V200KT: Velocity only, no level measurement, hydrodynamic
— CSP-V2H1KT: Velocity + Ultrasonic level from bottom, hydrodynamic
— CSP-V2D0KT: Velocity + Pressure sensor, hydrodynamic
— CSP-V2U1KT: Velocity + Ultrasonic level from bottom + Pressure sensor, hydrodynamic -
CSM Mini sensors (for small structures and low levels)
Connection to NivuFlow 750 (via Box EBM), NivuFlow Mobile 750 and NivuFlow Stick converters
— CSM-V100K: Velocity only, no level measurement, hydrodynamic
— CSM-V100R: Velocity only, no level measurement, cylindrical
— CSM-V1D0K: Velocity + Pressure sensor, hydrodynamic
VELOCITY MEASUREMENT
- Technology: ultrasonic cross-correlation with digital recognition of image spectra (patented)
- Number of scanned layers: up to 16
- Frequency: 1 MHz
- Bidirectional measurement
- Zero point drift: none (absolute stability)
- Temperature compensation
- Measurement range: -100 cm/s to +600 cm/s
- Minimum level (depending on model)
— CSM-V100K and CSM-V100R: 3 cm
— CSM-V1D0K: 5.5 cm
— POA: 6.5 cm
— CS2 and CSP: 8 cm - Error limits (per layer scanned)
< 1% of measured value (v > 1 m/sec)
< 0.5% of measured value + 5 mm/sec (v < 1 m/sec) - Acoustic emission angle: ± 5 degrees inclination
- Angle of incidence
— CSM-V100K: 20°.
— CSM-V1D0K: 35°.
— CSM-V100R7: 20°.
— CSM-V100R4: 45°.
— POA: 45°.
— CS2 and CSP: 50
LEVEL MEASUREMENT WITH INTEGRATED PRESSURE SENSOR
- POA, CS2, CSP and CSM-V1D0K sensors,
— Measuring range 0 to 500 cm
— Measurement uncertainty: ≤ 0.5% of final value
LEVEL MEASUREMENT WITH INTEGRATED ULTRASONIC SENSOR
- POA and CSP sensors
— Measuring range 0 to 200 cm (smallest: 5 cm)
— Measurement uncertainty: ≤ ±2 mm - CS2 sensors
— Measuring range 0 to 500 cm (smallest: 8 cm)
— Measurement uncertainty: ≤ ±2 mm
LEVEL MEASUREMENT BY SEPARATE ULTRASONIC TRANSIT TIME SENSOR
- DSM sensors
— Technology: Ultrasonic Transit time - Frequency 125 kHz/200 kHz
— Measuring range: 0 to 200 cm
— Dead band: 4 cm
— Measurement uncertainty: < ±5 mm - OCL sensors
— Technology: Ultrasonic Transit time - Frequency 120 kHz
— Measuring range: 0 to 200 cm
— Dead band: 14 cm
— Measurement uncertainty: ≤ ±5 mm
TEMPERATURE MEASUREMENT
- POA, CS2, OCL sensors
— Measuring range: -20°C to +50°C
— Measurement uncertainty: ±0.5 K - CSP sensors, CSM-V100K, CSM-V1D0K, DSM
— Measuring range: -40°C to +80°C
— Measurement uncertainty: ±0.5 K
MATERIALS AND ENVIRONMENT
- Materials in contact with the medium: polyurethane, PVDF, stainless steel, PPO GF30, PA, PEEK, PTFE (depending on model)
- Cable types: LiYC11Y
- Degree of protection: IP68 (waterproof/submersible for long periods)
- Operating temperature: -20°C/-40°C to +40°C/+80°C (depending on model)
- Maximum operating pressure: 1 Bar to 16 Bar (depending on model)
APPROVAL FOR EXPLOSIVE ZONES (OPTIONAL)
Related products
- NivuFlow 750 and NivuFlow Mobile 750
- NivuFlow 7550 (hybrid radar+cross-correlation velocity measurement system)
- NivuFlow Stick
- Various installation accessories (contact us)
