- 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
- Built-in pressure cell mechanically protected
KDA flow velocity sensors are suitable for continuous measurement of slight to heavily polluted media. The wedge-shaped sensors are designed for installation on either the channel wall or the channel bottom.
Combined with transmitter types such as PCM F and OCM F the result is a complete flow measurement system.
Typical applications for KDA wedge 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
- Measurement campaigns in channel networks
- and many more
Common | |
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Measurement principle | Doppler (flow velocity) Piezo-resistive pressure measurement (level measurement)
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Protection | IP 68 |
Ex-Approval | II 2G Ex ib IIB T4 Gb |
Operating temperature | -20 °C to +50 °C
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Storage temperature | -30 °C to +70 °C |
Operating pressure | max. 4 bar (combi sensor with pressure cell max. 1 bar) |
Cable lengths | 10/15/20/30/50/100 m pre-configured, can be extended upon request; a pressure compensation element is required if cables longer than 30 m are used with sensors featuring an integrated pressure measurement cell. The compensation element can be used also to connect the extension.
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Cable types | Combi sensor with pressure measurement:: LiYC11Y 2x1.5 + 1 x 2 x 0.34 + PA 1.5/2.5 Sensors without pressure measurement: LiYC11Y 2 x 1.5 + 1 x 2 x 0.34
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Outside cable diameter | Combi sensor with pressure measurement: 9.75 mm ±0.25 mm Sensors without pressure measurement: 8.4 mm ±0.25 mm
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Sensor connection | Cable end pre-configured for connection to OCM F / FR, cable types "K" or "L"
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Sensor types | v-sensor with T-compensation
v-sensor with T-compensation and h measurement (hydrostatic)
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Medium-contacting materials | PVDF (wedge sensor body); stainless steel 1.4571 (ground plate); Polyurethane (cable sheath, screw joint and pipe sensor head) Additionally for sensors with pressure measurement cell: Hastelloy© C276 (pressure cell); Viton; PA/PR (pressure cell gasket) Optional: cable with FEP coating (sensors without pressure measurement only)
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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 |
Level measurement – Pressure | |
Measurement range | 0 to 5 m |
Zero point drift | max. 0.75 % of final value (0 – 50 °C) |
Measurement uncertainty | standing medium: +/- 0.5 of final value |
Temperature measurement | |
Measurement range | -20 °C to +60 °C |
Measurement uncertainty | ±0.5 K |
Specifications subject to change.
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
Declaration of Conformity Compact Doppler Active Sensors
Compact Doppler Active Sensors KDA-K.. / KDA-R.. / KDS-K.. / KDS-R..