NIVUS - Model KDA-K/KDS-K -Doppler Wedge Flow Sensor

• Latest fourth-generation intelligent 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

General

• Measurement principle:
• Doppler (flow velocity)
• Piezo-resistive pressure measurement (level measurement)
• Sensor types:
• v-sensor with T-compensation
• v-sensor with T-compensation and h measurement (hydrostatic)
• 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 (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.
• 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
• Outside cable diameter:
• Combi sensor with pressure measurement:: 9.75 mm ±0.25 mm
• Sensors without pressure measurement: 8.4 mm ±0.25 mm
• Sensor connection: Cable end pre-configured for connection to OCM F / FR, cable types "K" or "L"
• 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)

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 500 cm
• Zero point drift: max. 0.75 % of final value (0 – 50 °C)
• Measurement uncertainty: standing medium:
• +/- 0.5 of final value (within a range of 0.05 – 3.5 m)

Temperature measurement

• Measurement range: -20 °C to +60 °C
• Measurement uncertainty: ±0.5 K