When people hear of viscosity for the first time, invariably they ask these three questions:
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Topics: Newtonian Fluid, Measure Viscosity, Viscometers, Viscosity, Viscosity in Food
When our customers tell me about the different places where CENCO and CSC Digital Moisture balances are used it always interests me.
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Topics: Moisture Analysis, Moisture Testing, Loss-On-Drying, Moisture, moisture content, water content measurement
Water Activity
Water activity is the water in a material available to support the growth of microorganisms. Consequently, the measurement of water activity is important in areas such as food processing, pharmaceutical production, products affected by mold, and a host of products that change characteristics when exposed to moisture.
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Topics: Water Activity, stop mold, chilled mirror, aw
The most popular was to measure include:
- Drying the material and measure the weight loss
- Using a calibration and electronic instrument
- Using a titration method such as Karl Fischer
When using these processes, we take for granted that the results will be the product's actual moisture.
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Topics: Evaporation, Moisture Oven Test, Infrared Moisture, Moisture Analysis, Moisture Testing, Karl Fischer Titration, Loss-On-Drying, evaporator oven
I was musing, the other day on the designs of two ring tensiometers. One of them is called an interfacial tensiometer and the other simply a tensiometer. The plain tensiometer works only with an upward pull and the interfacial works with both an upward pull as well as a downward push. Before I get to my question a couple of definition might be useful.
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Topics: Surface Tension Measurement, Surface Tension, interfacial tension, interfacial surface tension, surface Tension Testing, du Nouy Ring Method, du Nouy tensiometer, Liquid Properties
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Topics: Newtonian Fluid, Viscometers, Dynamic Viscosity, viscometer, rotational viscometer, Viscosity Stress, Viscosity Shear Rate, Non Newtonian
The definition of Liquid Surface Tension is simple.
It's the force that keeps a liquid from flying off into space.
However, the measurement of surface tension can take many forms, which can be confusing. In an attempt to get some clarity, we have articulated two principle measurement concepts in this article: drop-based measurement and force-based measurement.
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Topics: Automatic Digital Tensiometer, Automatic Surface Tension Measurment, Surface Tension Measurement, Surface Tension, Interfacial Tensiometer, interfacial tension, tensiometers, du Nouy tensiometer, surface tension instruments, surface tension analysis
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Topics: Surface Tension Measurement, tensiometers, surface tension instruments, surface tension analysis, walk on water
Yes Harry, there is a Santa Claus. Or, more specifically, there really is a Holy Grail for ensuring consistent particle size analysis.
If you’ve been following along, you know it was proven by Pequeño and his family of 150 micron particles who tried to bust our friend Harry’s quality control by attempting to slip through the mesh in Harry’s test sieves and defeat sieve certification.
If you missed this drama, check out previous posts in the Holy Grail series here:
Is there a Holy Grail of Sieve Analysis?
Will Certification Lead to the Holy Grail of Sieving?
Does Calibration Light the Way to the Sieving Holy Grail?
Sieve Calibration is the Holy Grail!
And finally check out our eBook here: Free eBook
Now that we have indeed confirmed that, yes, sieve calibration really is the Holy Grail that sieve testers have been looking for, let’s get to work and dive a little deeper. Let’s examine some methods of sieve calibration.
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Topics: Pequeño, Calibration, Particle Size Analysis, Sieve Calibration, Sieve Certification, Sieve Testing, Sieves, Sieving Process, du Nouy tensiometer, sieve mesh, particle sieze testing, sieve stack, Sieve Quality
You may remember Pequeño and his family of very small 150 micron (150µ) particles being very determined to defeat sieve certification.
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Topics: Calibration, Particle Size Analysis, Sieve Calibration, Sieve Certification, Sieve Testing, Sieves, Sieving Process, Sieve Analysis, Sieve Quality
