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



Technical Data
Measurement principle

Doppler (flow velocity)


IP 68

Operating pressure

max. 4 bar

Min. pipe diameter

DN 100

Medium-contacting materials
  • Stainless steel 1.4571 (pipe sensor shell)
  • Polyurethane (cable sheath, screw joint and pipe sensor head)
Cable lengths

10 / 15 / 20 / 30 / 40 / 50 / 60 / 70 / 80 / 90 / 100 m pre-configured, can be extended upon request

Cable types

LiYC11Y 2 x 1,5 + 1 x 2 x 0,34

  • ATEX: IBExU 07 ATEX 1082 Edition 1 
  • II 2G Ex ib IIB T4 Gb
Sensor connection

Cable end pre-configured for connection to OCM F / FR, cable type "K"

Operating temperature

−40 °C to +50 °C

Outside cable diameter

8,4 mm ±0,25 mm

Storage temperature

−40 °C to +70 °C

Sensor types

v-sensor with T-compensation

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 +50 °C

Measurement uncertainty

±0.5 K

Specifications subject to change.


Datasheet KDA Sensors

Datasheet for KDA pipe and wedge sensors

Technical Instruction for Doppler Sensors

Technical Instruction for KDA Doppler sensors (pipe and wedge style)

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

Installation instruction for save installation 

EC-Type Examination Certificate Compact Doppler

for  KDA-K.. / KDA-R.. / incl. supplements

Declaration of Conformity Compact Doppler Active Sensors

Compact Doppler Active Sensors KDA-K.. / KDA-R.. / KDS-K.. / KDS-R..

Declaration of Conformity "Ex" Compact Doppler Active Sensors

System Products
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