Flow Sensors
KDA Doppler Wedge Sensor
Part No. KDA-K/KDS-KWedge-shaped flow velocity sensor for channels
Ultrasonic sensors for flow measurement in slight to heavily polluted media. Wedge shape for installation on channel wall or channel bottom
Description
- 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
Technical Data
| Common | |
|---|---|
| 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 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 (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 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.
Downloads
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)
EC Type Examination Certificate EX KDO
Declaration of Conformity Compact Doppler Active Sensors
Kompaktdoppler-AktivsensorenKDA-K.../ KDA-R.../ KDS-K…/ KDS-R…
