Flow Sensors

KDA Doppler Pipe Sensor

Part No. KDA-R/KDS-R

Flow velocity sensor for installation in pipes

Ultrasonic sensors for flow measurement in slight to heavily polluted media. Designed for fastening in pipes using a nozzle

  • Latest fourth-generation intelligent <link https: www.nivus.com en service-download know-how doppler external-link-new-window>Doppler technology
  • Cost-effective pricing
  • Suitable for all channel cross sections
  • Easy to install without the need for additional constructions
  • Cables can be extended without any problems
  • Measurement in heavily polluted and abrasive media


KDA flow velocity sensors are suitable for continuous measurement of slight to heavily polluted media. The pipe sensors are designed for installation in pipes from the outside using a nozzle. Combined with transmitter types such as PCM F and without OCM F the result is a complete flow measurement system.

Typical applications for KDA pipe sensors

  • Wastewater treatment plants: intake, discharge, activated sludge tank intakes, return sludge, recirculation, surplus sludge, digester discharge and flocculant dosage
  • Permanent measurements on stormwater treatment facilities such as stormwater overflow tanks, rainwater sedimentation and retention tanks
  • Direct discharge control, infiltration (extraneous water) or leakage detection
  • Industrial wastewater networks
  • and many more



Measurement principle Doppler (flow velocity)
Sensor types v-sensor with T-compensation
Protection IP 68
Ex-Approval II 2G Ex ib IIB T4 (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 OCM F / FR, cable type "K"
Medium-contacting materials Stainless steel 1.4571 (pipe sensor shell); Polyurethane (cable sheath, screw joint and pipe sensor head)
Flow velocity measurement
Measurement range -600 cm/s to +600 cm/s
Measurement uncertainty ±1 % of measurement range end value
Zero point drift absolutely stable zero point
Beam angle ±5 degrees
Temperature measurement
Measurement range -20 °C to +60 °C
Measurement uncertainty ±0.5 K

Specifications subject to change.

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