Flow Sensors

POA Correlation Pipe Sensor

Part No. POA-V2XXR

Medium measurement range for levels up to ca. 1m

Cross correlation sensors for flow velocity and level detection in part filled and full pipes and channels. For installation in pipes

[Translate to English:] POA-Rohrsensor für die Durchflussmessung im Abwasser

[Translate to English:] POA-Rohrsensor mit Verlängerungseinheit

[Translate to English:] Durchflussmessung Ultraschall Kreuzkorrelation

[Translate to English:] Durchflussmessung - Installationsvergleich

POA flow velocity sensors are suitable for continuous measurement of slight to heavily polluted media. The pipe-shaped sensors are designed for installation in pipes from the outside using a nozzle. Combined with transmitter types such as NivuFlow 750 and an external level measurement the result is a complete flow measurement system.

For high-accurate flow measurement of ultrasonic cross correlation method
Interference-free connection over long distances through digital signal transmission
Cables can be extended without any problems using standard cables
Absolutely stable zero point and drift-free
Measurement in heavily polluted and abrasive media
Easy installation without additional constructions and perfectly matched mounting accessories
Installation under process conditions possible
Suitable for all channel cross sections

Typical applications for POA pipe sensors

Stormwater treatment plants: flow measurements and control of the discharge to the WWTP
Wastewater treatment plants: intake, discharge, activated sludge tank intakes, return sludge, recirculation, surplus sludge, digester discharge and flocculant dosage
Direct discharge control, infiltration (extraneous water) or leakage detection
Industrial wastewater networks
and many more

General
Measurement principle	Ultrasonic Cross Correlation with digital pattern detection (flow velocity) Ultrasonic transit time (level measurement)
Protection	IP 68
Ex-Approval	II 2 G Ex ib T4 Gb (ATEX) Ex ib IIB T4 Gb (IECEX)
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
Cable lengths	10/15/20/30/50/100 m pre-configured, can be extended upon request
Cable types	LiYC11Y 2 x 1.5 + 1 x 2 x 0.34
Outside cable diameter	8,4 mm ±0,25 mm
Sensor connection	Cable end pre-configured for connection to NivuFlow 750 Cable end with plug for connection to NivuFlow Mobile 750
Sensor types	v-sensor with T-compensation v-sensor with T-compensation and h measurement (water-ultrasound)
Medium-contacting materials	Polyurethane, stainless steel 1.4571, PPO GF30, PTFE Optional: sensor resistant to chemicals made of PEEK, sleeve made of Hastelloy C-276; cable with FEP coating
Flow velocity measurement
Measurement range	-100 cm/s to +600 cm/s
Quantity of scan layers recorded and computed	max. 32
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 water-ultrasonic sensor
Measurement range	0.05 to 200 cm
Zero point drift	Absolutely stable zero point
Measurement uncertainty	+/− 2.0 mm or 0.2% of the measured range (larger value applies)
Temperature measurement
Measurement range	−20 °C to +60 °C
Measurement uncertainty	±0.5 K

Specifications subject to change.

Technical Instructions | Correlation Sensors (Rev. 09)

Technical instructions for correlation sensors and external electronic box

download file
PDF 4 MB

Installation Instruction | Correlation and Doppler Sensors (Rev. 07)

Installation instruction for save installation

download file
PDF 5 MB

EC type examination certificate sensor type POA, OCL and CS2

EC type examination certificate sensor type POA incl. supplement

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PDF 516 KB

IECEx Certificate of Conformity "Sensors type POA, OCL and CS2"

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PDF 761 KB

EU Declaration of Conformity | Ultrasonic Active Sensors POA / OCL / CS2

download file
PDF 37 KB

EU Declaration of Conformity | “Ex” Ultrasonic active sensors POA / OCL / CS2

download file
PDF 193 KB

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