Flow Sensors

CS2 Correlation Pipe Sensor

Part No. CS2-V1

Large measurement range for big pipes

Ultrasonic sensors for flow measurement with very high accuracy in slight to heavily polluted media. For installation in pipes up to 5000 mm diameter

  • Very high accuracy by means 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
  • Particularly suitable for pipe sections starting at 1000 mm diameter

CS2 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.

Typical applications for CS2 pipe sensor

  • Channel networks: billing measurement places, flow measurement in large pipe sections
  • Wastewater treatment plants: intake, discharge, activated sludge tank intakes, return sludge, recirculation, surplus sludge, digester discharge and flocculant dosage
  • Industrial wastewater networks
  • and many more



Measurement principle Ultrasonic Cross Correlation with digital pattern detection (flow velocity)

Ultrasonic transit time (level measurement)

Zero point drift absolutely stable zero point
Sensor types v-sensor with T-compensation
Protection IP 68
Ex-Approval II 2 G Ex ib IIB 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 (for combi sensors with pressure measuring cell max.1 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 PA 1,5/2,5
Outside cable diameter 8.4 mm ±0.25 mm
Sensor connection Cable end pre-configured for connection to OCM CF
Medium-contacting materials Polyurethane, stainless steel 1.4571, PPO GF30, PTFE, PA6 GF30
Optional sensor resistant to chemicals made of PEEK, sleeve made of Hastelloy C-276; cable with FEP coating
Construction - Wedge sensor for installation on channel bottom or channel wall
- Pipe sensor for installation in pipes with sensor screw joint and retaining element
Measurement uncertainty for 0.05≤|V|≤0.5 m/s: E_v=0.5/|V| [%]
for |V|>0,5 m/s: E_v=1 %

Specifications subject to change.

Technical Instructions Correlation Sensors

Technical instructions for correlation sensors and external electronic box

Installation Instruction for Correlation and Doppler Sensors

Installation instruction for save installation 

EC type examination certificate sensor type POA

EC type examination certificate sensor type POA incl. supplement

IECEx Certificate of Conformity

Declaration of Conformity Ultrasonic Active Sensors POA / OCL / CS2

Ultraschall-Aktivsensoren POA / OCL / CS2

Declaration of Conformity "Ex" - Ultrasonic Active Sensors POA / OCL / CS2


Tender Specification CS2 Sensor

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