Kobold DWD Baffle Plate Flow Transmitter



The new KOBOLD measuring instrument type DWD is a flow rate transmitter with digital indication of the actual flow rate, analogue output and two adjustable all-or-nothing relays indicating the switching point for monitoring limit values. An RS232C serial interface is available as an option.

The combination of the proven displacement-deflection measuring technique with the new patented pendulum system and electronic analyser with programmable EEPROM produces a reliable and economical flow transmitter. Due to its modern technology and features this device is also ideally suited for applications where much more expensive methods of measurement have been used up until now.

The flow transmitter type DWD uses the reliable displacement-deflection technique together with new patented technology. The flowing medium presses against a baffle plate that is fastened to a pendulum – thus causing the displacement. The pendulum that is retained by a progressive spring system changes its position without friction and depending on the flow. The position of a magnet attached
to the pendulum is sensed by a Hall-effect sensor fixed outside the medium. This signal is processed and evaluated by microchip-based electronics with EEPROM memory.

The devices are calibrated and supplied according to your specifications. Costly adjustments and programming are not required. The DWD is ready for immediate operation. The devices can be re-programmed if necessary. The casing can also be adapted easily for the desired mounting position. Numerous connections and materials allow a wide range of applications. Large line cross-sections can also be measured reliably and economically.

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Features

Areas of Application

  • Heavy goods industry
  • Rolling mills and mill trains
  • Chemicals and pharmaceuticals industries
  • Food and beverage industry
  • General mechanical engineering and capital equipment
  • Measuring and monitoring product, cooling and lubricant circuits

Advantages at a Glance

  • Ready for operation immediately
  • No bearings, no friction
  • Only a slightly moving part
  • Negligible sensitivity to dirt
  • Wider flow range
  • Small pressure loss
  • Any measuring ranges programmable
  • Linear signal

Specifications

Technical Details

 Material combinationMaterial combinationMaterial combination
Device part567
Pendulum caseBrassstainless steelstainless steel
Pendulum systemstainless steelstainless steelstainless steel
T piecebrassstainless steelPVC
SealsFPMFPMFPM
Connecting threadBrassstainless steelPVC
Connecting flangesteel zinc-plat.stainless steelPVC
Weld-on partstainless steelstainless steelboring pipe box PVC
Electronics housingaluminium coated PA 66aluminium coated PA 66aluminium coated PA 66
tmax*120°C120°C20°C (60°C)
pmax*25 bar25 bar16 bar (2 bar)
  • Flow range:
    flow ratio 1:10 standard
    (for example 10-100 l/min)
    max. 1:25 upon request
  • Accuracy: ±1.5% of full scale
  • Medium temperature: -20°C...+120°C (other ranges upon request)
  • Max. pressure:
    25 bar (higher values upon request)
    16 bar (DWD-17/27/37)
  • Direction of flow: any
  • Analogue output: 0...10 V or 4...20 mA (switchable)
  • Switching contacts: 2 x 230 V, 1 A max., adjustable with indication on display
  • Display: LCD DOT-matrix module, 2 x 8 positions
  • Totaliser: with EEPROM memory
  • Power supply: 24 VDC ±10%
  • Current consumption: max. 200 mA
  • Protection type: IP65
  • Optional: RS232C serial interface

Download Datasheet: Kobold DWD Baffle Plate Flow Transmitter

Reference : kobold.com

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