On-site liquid digital density measurement

| Information and Communication Technology

Latest instrument from Anton Paar enables rapid sampling and analysis of liquid densities in a variety of measurement units.

Digital density measurement could be about to evolve further with the new DMA 35 product from Anton Paar. The robust portable density meter needs only 2 mL of sample for the measurement and delivers results within seconds, simplifying field measurements.

The DMA 35 portable density meter employs the oscillating U-tube principle and is exceptionally efficient and simple to use: it requires only 2 mL of sample, filled with the built-in hand pump, to conduct measurements in less than a minute, including filling and cleaning. It is now also ready for both left- and right-hand use and the sensitivity of the capacitive keys is suitable for operation with or without gloves. Sample containers are identified before the measurement with the help of the integrated RFID interface. This minimises costs and valuable working time and makes sure that all measured data are allocated to the correct sampling location. The Bluetooth interface allows operators to send the stored results to a computer or printer wirelessly to ensure perfect documentation of results.

This latest version of Anton Paar’s portable density meters measures a huge variety of different samples – ranging from fermenting beer and wine to solvents and acids. The instrument shows the result as density or concentration in units such as °Brix, % v/v alcohol, or % w/w H2SO4. Results are automatically compensated for the temperature influence, so no further calculations are necessary and potential user errors are eliminated.

For filling highly viscous or expensive samples, the instrument is put in a stable position on the table and filled with a syringe from the top. The screen of the instrument rotates automatically and the handheld device turns into a mini benchtop instrument. The lock-function of the pump avoids carryover of sample or cleaning liquid. The density results are accurate to 0.001 g/cm3 and the influence of viscosity is automatically corrected.

Packaged in a robust housing with a hard glass front, the DMA 35 is built to withstand the knocks and spills of outdoor use. The cartridge containing the glass measuring cell is protected with an additional rubber housing. It is completely separated from the instrument’s electronics to prevent liquid entering the instrument in case of any cell rupture. What’s more, the cartridge containing the measuring cell can be simply replaced by Anton Paar service personnel should the instrument suffer from a cell rupture by mischance.

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