DT300 Online Density Transmitter

The DT300 Online Density Transmitter is an instrument developed for the continuous measurement of liquid density and  concentration. This online density transmitter keeps measuring in real time, consequently,  allowing the process a high performance with frequent corrections.

This online density transmitter uses a pioneering technology that consists of a capacitive type differential pressure sensor coupled to a pair of pressure
repeaters that works immersed in the process. At the same time, a temperature sensor located between the two pressure repeaters is used to compensate the temperature variations in the process fluid.

Internally of the DT300, there is a dedicated algorithm to calculate the fluid density and other related properties.

Depending on the industrial process, density may be expressed in g/cm3, Kg/m3, lb/ft3, Specific Gravity, Brix degree, Gay-Lussac degree, Baumé degree, Plato degree, INPM degree, API degree, Solids %, Concentration %, etc.

Protocol Technology Choices

DT300 Online Density Transmitter Series are available in three different technologies: HART® (DT301), FOUNDATION FieldbusTM (DT302) and
PROFIBUS PA (DT303). These online density devices can be configured with a Smar and other manufacturers configuration tools.

DT301 - HART® - 4 to 20 mA

Multi-drop operation mode;
Supports DT M and EDD L.


17 different types of function blocks for control strategies and advanced diagnostics;
Up to 20 function blocks;
Two analog inputs: density and concentration or temperature;
Execution of up to 31 external links (19 Publisher and 12 Subscriber);
12 mA consumption;
Dynamic block instantiation improves interchangeability;
FOUNDATION FieldbusTM registered and ITK approved;
MVC (Multivariable Container) enabled.


12mA consumption;
Three Function blocks for analog inputs: density, concentration and temperature;
Integrated to Simatic PDM;
Supports DT M and EDD L;
Profile 3.0 improves interchangeability.


DT300 Online Density Transmitter Applications

Sugar and Alcohol Processing Plants:

Brix of the sugarcane juice, brix of the must, brix of the
syrup, brix of the molasses, brix of the solved juice,
calcium solution of the Baumé, interface level of the
hexane cycle, lime density, INPM degree of the hydrated
alcohol, INPM degree of the anhydrid alcohol, etc.

Dairy Product Industries:

Condensed milk, Lactose, Yogurt, Cream cheeses,
Lactic Acids, etc.

Food Industry:

Vegetable oils, miscellaneous extractions, fruit syrup,
starch dilution, glucose, jams, jellies, sweets, honey,
tomato pulp, citrus juices, etc.

Pulp and Paper Industries:

Black liquor, green liquor, white liquor, red liquor, caustic
soda concentration, ash dilution, talc dilution, pulp
dilution, ink concentration, potassium hydroxide, etc.

Beverage Industry:

Beer (Plato degree in the fermentation process) Soft
Drinks (brix of the liquid sugar, etc.), liquors, wines,
soluble coffee, malt, tequila, etc.

Chemical Industry:

Acids, concentration/mixture, caustic soda, glycol, salt
solution, detergent, toluene, urea, potassium, etc.

Mining Slurries:

Mineral pulp, extraction of thins, flotation, thickening,
acid concentration, starch dilution, scrapers, lime mud.

Petrochemical Industry:

Gas washing water, lubricant oils, aromatic extraction,
fuel oils, gasoline, kerosene, water/oil interface level.

Detailed Features

Accuracy ±0.0004 g/cm³ (±0.1 °Brix);
Temperature compensation;
Range 0.5 g/cm³ - 5 g/cm³;
Standard industrial and sanitary process connection;
Digital LCD indicator;
Direct density or concentration readout in engineering units;
Suitable for dynamic and static liquids;
Two wire loop powered;
Several different wetted materials;
Single integrated unit without moving parts;
Factory calibration and Self calibration;
In field re-calibration:
💎 No standard reference required;
💎No lab calibration required;
💎 No process shutdown.
Continuous/Self diagnostics;
Weather proof, explosion proof and intrinsically safe;
The control strategy is built from direct instantiation and deletion of function blocks;
Configuration and Parameterization all through open and interoperable configuration tools
available in the market, e.g., based on PC or PCMCIA Cards or operations by the local
adjustment switches (should be used with a LCD display);
Use of the Analog Input function;
Totally digital; including sensor, electronics and communication;
Configurable Local Adjustment (Foundation fieldbusTM and PROFIBUS PA);
Easy firmware upgrade (via Flash Memory Interface) for Fou ndatio n fieldbusTM and
Easy maintenance;
Three technology options: HART®, Foundation fieldbusTM, PROFIBUS PA.

Literature and Links

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