True density meter for all industries

By admin June 21, 2016 3:44 pm IST

  A lot of technical solutions exist on the market for the measurement of density and of concentration as a parameter derived from density in the case of two phase mixtures. However only few of them are able the meet the requirements of today’s process equipment users. Mechanical solutions using a float or a balance as measuring element are limited in accuracy, suffer from wear, proved to be having an high sensitivity against pressure strokes, vibration, and dirt etc. Optical solutions like refractometer are fragile and basically confined to clean liquids. Ultrasonic based solutions are very expensive, complicated with regard to calibration while most of the time unable to deal with air bubbles included in the liquid. Radiometric density meter are suited for difficult products like slurries and quite simple to install, but they have only limited accuracy and generate costs due to environmental protection rules. Coriolis mass flow meters are sometimes used as density meter because they are able to deliver density information besides the main parameter mass flow they are actually designed for. The practical result is often disappointing because such devices do not ensure reasonable accuracy, and moreover theses instruments basically conceived to measure flow rate suffer from zero drifts and sensitivity to pressure, vibrations and stress arising on the piping.
End-user of the process industry are in fact looking for innovative solutions offering an high accuracy and repeat ability, an excellent long term stability, a great flexibility of use and a short term return of investment. Modern oscillating tube type density meters from Bopp & Reuther Messtechnik are able to meet all these requirements and have proved in more than 30 years of field experience their unbeatable features among process instrumentation.

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