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Versatile Coriolis flowmeter has advanced functionality

19 August 2010

As Rota Yokogawa, the European flow centre of excellence for the Yokogawa Electric Corporation, celebrates its 100th anniversary, one of the company’s flagship products, the Rotamass Coriolis mass flowmeter, enters its third generation. One of the indirect benefits of accurate density measurement is more accurate concentration measurement of mixtures and solutions, such as oil and water mixes or sugar solutions. The corresponding concentration values can be integrated into the process control.

Yokogawa Rotamass
Yokogawa Rotamass

The flowmeter now has a density accuracy of up to ±0.0005 g/cm3, which is achieved and substantiated by a density calibration with three different liquids and at different temperatures. This means that reliable and accurate density measurement can now be carried out with a Coriolis meter over a wide operating temperature range.

Traditionally the mass flow output from Coriolis meters responds in a highly sensitive manner to gas bubbles in liquids. The Rotamass, on the other hand, has a special sensor design which can tolerate a relatively high proportion of gas in the medium. Diagnostic functions also enable the detection of gas bubbles contained in the liquid, so that an appropriate response can be initiated, guaranteeing functionality even at high gas concentrations.

Many applications involving highly viscous media – for example asphalt – require high process temperatures in order to lower the viscosity of the medium for pumping purposes. To avoid cooling of the medium, the mass flowmeter requires special insulation and heating. This is a particular strength of Rotamass, which can handle applications involving temperatures of up to 350°C.

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