New technology—new possibilities
Conventional soil particle size analysis traditionally had only two options—the extremely archaic option or the extremely expensive option. The older hydrometer (or pipette) method is a long, painstaking, manual process requiring many measurements at precise intervals for up to 24 hours, making it prone to error. The ultra-expensive laser method has accuracy issues because flat soil particles like clay can confound the measurement. Both methods can lead to hours of wasted time and effort.
That’s why we developed a revolutionary new way to reduce the time and effort needed for soil particle size analysis.
Particle size analysis, automated
PARIO calculates the particle size distribution by Stokes’ law, with a range spanning from 63 μm to 1 μm, finally making it easy to obtain a complete particle size distribution curve, instead of just a few measurements at discrete time points.
It allows for unattended, automated operation, with no interference by lab personnel. Just set it up and come back later to a finished measurement with all the data you need.
New method reduces error—and effort
PARIO adopts the same sample prep your lab already uses, so it fits perfectly into your existing workflow. It reduces errors by replacing and automating the lengthy “hydrometer” portion of the process using the new, more accurate “Integral Suspension Pressure Method” (ISP). This method does not require the insertion of a hydrometer or sampling of suspension volume with a pipette, which disturbs the sedimentation process. Being automatic, it also avoids manual reading or calculation errors. This results in an overall error rate of just 3%—lower than any conventional particle size analysis method.
PARIO automatically measures at an interval of ten seconds and continuously records the change of suspension pressure as well as the temperature. This results in highly accurate and continuous particle size distribution curves. The data are automatically evaluated by our new data processing algorithm called called the ISP method..
The PARIO measuring method is based on Stokes’ law. That means there is no need for soil-specific corrections with transfer functions as required for almost any other automated measurement method, such as laser diffraction or image analysis.
Spend more time on what matters
To save you even more time, PARIO comes with an easy-to-use, all-in-one software solution for automated data inquiry, visualization, evaluation and export. Plus, PARIO, as part of the LABROS system, can be combined with the HYPROP, KSAT, or WP4C to completely characterize the physical and hydraulic properties in soil.
All of this serves one goal—to reduce the operating time you spend for particle size analysis, while at the same time improving accuracy. Skip hours of tedious manual measurements, and focus on your research.
The new PARIO soil texture analyzer. Complete particle size distribution curves. Not one particle of wasted time.
|Particle size range|
Range: 2-63 μm
|Approximate error in mass fraction detection|
|Accuracy of pressure measurement|
|Typical particle mass|
25−50 g per 1-L suspension
|Typical duration of measurement|
USB 5 V/100 mA
Microsoft Windows 7 or newer
Height: 450.0 mm (17.7 in)
Height: 293.0 mm (9.1 in)
|Volume of suspension|
Minimum: 15 °C
|Maximum tolerable temperature change during measurement|
|Required external measurements|
Content of organic matter
USB 2.0; 500 mA for receiving port
Manufactured under ISO 9001:2015
California requires the following notice:
⚠️ WARNING: This product may contain chemicals including ethylene glycol, lead, nickel, styrene and cadmium, which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov
Have a question or problem? Our support team can help.
We manufacture, test, calibrate, and repair every instrument in-house. Our scientists and technicians use the instruments every day in our product testing lab. No matter what your question is, we have someone who can help you answer it.
Phone Europe: +49 89 12 66 52 0