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High tech laboratory testing

Posted on Wednesday, 4 November 2015 at 14:10

Brand new applications require a special liquid calibration to get ultimate inline measuring results. To realize this, the physical properties of a liquid have to be investigated at predetermined concentrations, temperatures and pressures in order to make a proper liquid calibration. This investigation is normally done in our laboratory by making use of a measuring cell. Rhosonics currently has a measuring cell which is way too large for some applications.

Measuring cell including heating/cooling elements, ultrasonic, conductivity, and temperature sensors. A transmitter displays all the desired parameters.
Measuring cell including heating/cooling elements, ultrasonic and conductivity sensors and temperature sensors. A transmitter displays all the desired parameters.

An intern at Rhosonics designed a measuring cell which is way smaller in size with its volume of 0,5 litre. With this volume we can now handle smaller samples and can be pressurized up to 10 bar. This is done by using nitrogen. A hotplate is used to heat up the liquid inside the measuring cell and a Peltier-element is used to cool it down. Peltier-elements work by transferring heat from one side to another. To dissipate this heat, a heatsink and fan are attached to the Peltier-element. The sample is mixed by a motor which is mounted on top of the cover plate which is powering a propeller mixing element. This element is excellent for mixing slurries and liquids when also temperature distribution is critical. Thanks to the Hastelloy C2000 material of the measuring cell it’s also possible to make measurements of highly corrosive liquids at higher temperatures. These measurements are conducted with three Rhosonics sensors and two Pt100 temperature sensors. With this new measuring cell, Rhosonics is able to make calibrations even quicker than before while being able to include more variables into the calibration and doing this without losing any accuracy.

Tags: Research & development