MPROF: Open Channel Rate of Flow Measurement for Water Treatment Plants

Item Code: MPROF

Rate of Flow - Level Sensor (sensor is suitable for measuring the level of conductive or non conductive liquids, slurries and powdered or fine grained solids)
  • Application Temperature Range : Up to 100°C
  • Evaluation Unit on wall mount connected via cable
  • Galvanically isolated output 4-20mA (2 wire loop) in 800 ohms (Max), Switching : Three Point Level Switching, Each point independently settable, Switching O/P 3 x SPDT potential free C/O. Contacts per switch ing point rated at 6amps, 230V AC
  • Process connections : Screwed & flange
  • Pressure Die Cast Aluminium weather proof IP66 probe & wall Housing

In an application, the measuring electrode (sense probe) is provided with a stilling tube which forms a capacitor. The amount of capacitance of this capacitor is governed by the level of water between the two electrodes (sense probe & stilling tube). ROF measures the change in capacitance to measure the change in level of water. This level is then converted to 'Rate of Flow', depending on the weir type selected or K,n parameters entered for the equation for calculating the flow rate.

  • Built-in weir selection for rectangular suppressed, rectangular contracted, triangular and cipoletti weirs
  • Readings directly available in cusecs upon entering the weir length of rectangular and cipoletti weirs
  • Conventional Q = K*Level^n format is also present if built-in formulae are not required
  • Works on 24 V DC as well as 90 to 265 V AC supplies
  • Galvanically isolated 4-20 analog output can be coupled to 'Level' (Head) or 'Flow Rate' through parameter selection at site
  • Pulse coded transmission from sensor to controller / indicator unit, thus ensuring error free readings
  • Values of n for the equation Q = K*Level^n allowed in x.xx format, providing better precision
  • Allows better implementation of various flumes and triangular weir (which requires n = 2.48)
  • Restriction of keeping n = 0.5 - 1.5 is removed
  • Built-in "time-aware" advanced totalizer eliminating the need of external hardware totalizer for quantity assessment
Water Treatment Plant

Open Channel
Open Channel Flow