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Density & Concentration Measurement: Coriolis VS Tuning Fork

BoppReuther DIMF density meter vs Coriolis Meter for Density MeasurementMany manufacturers recommend Coriolis Mass Flow Meters for density and concentration measurement.

In comparison with Bopp & Reuther DIMF density meters (tuning fork principle) the branded Coriolis devices show several disadvantages:

  • lower accuracy and repeatibility
  • slower stability with temperature changes
  • calibration usually for max. flow accuracy (vs density optimization)
  • expensive for big pipe sizes and aggressive chemical applications

Comparison:

 Parameter Branded Coriolis Meters
DIMF Density Meter
 Accuracy 0.2 - 0.5 kg/cbm
0.1 kg/cbm
Temp. Change Stability
1.5 - 2 sec adjustment
0.5 sec adjustment (3/4x faster)
 Installation
inline (flow and density together)
bypass, (no shut down, easy dismantling)
 Calibration
usually to maximize flow, 1-2x/year
maximize density, long term stability
 Chemical Applications (Hastelloy/Tantalum)
expensive
(esp. for big pipe sizes)
3x cheaper (bypass minimizes material),  
DIMF + El-Mag FM with PTFE lining more economic

More on DIMF Tuning Fork Measurement