Intelligent concentration/density transmitter

March 2005 Maintenance, Test & Measurement, Calibration

The DT301* 'Touché' Intelligent Concentration/Density Transmitter is an instrument developed for the continuous, online measurement of liquid concentration and density, directly in the industrial process.

Its pioneer technology consists of a capacitive type differential pressure sensor coupled to a pair of pressure repeaters immersed in the process. A temperature sensor located between the two pressure repeaters is used to compensate the temperature variations in the process fluid. A dedicated software algorithm then calculates the fluid density. Depending on the industrial process, density may be expressed in Brix, Gay-Lussac, Baumé, Plato degree - or concentration percentage, etc.

Designed for process control applications, these 2-wire transmitters generate a 4 to 20 mA signal proportional to the concentration/density. Digital communication for remote calibration and monitoring is also provided. Installation may be implemented in open or pressurised tanks applications - or directly in pipes, since the DT301 is suitable for both dynamic and static fluids. The Sanitary model uses a Tri-Clamp connection to allow a quick and easy connection and disconnection from the process. Wetted surface finish is 32Ra as standard. These models meet 3A recommendations so that the probe surface is free of crevices where food or bacteria can be collected. (3A is a widely accepted sanitary standard in the food, drug and beverage industry.)

The DT301 is available as a 4-20 mA + HART communication or Fieldbus or Profibus. If only a 4 to 20 mA device is purchased it can be upgraded to Profibus or Fieldbus with the purchase a new card.

For more information contact KAB Instruments, 011 435 5380, [email protected], www.kabinstruments.com

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