I was musing, the other day on the designs of two ring tensiometers. One of them is called an interfacial tensiometer

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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

The first question is, "What are Liquid Properties?" Are they some kind of underwater real estate?

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Topics: Automatic Surface Tension Measurment, Measure Viscosity, Consistency, contact angle, Liquid Properties, density

 

People love to say taste is everything, but food rarely lets the story end there. A dish can look impressive and taste great, yet if the texture is off, enthusiasm can disappear after the first bite.

Food purchasers and manufacturers know flavor cannot carry the whole performance. If a product feels too soggy, too tough, too grainy, or simply not as expected, that first bite may be followed by a firm “no thanks.” That is why these sensory qualities need to be measured objectively, consistently, and repeatably. That set of qualities has a name: texture.

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Topics: Texture Analysis

At first glance, viscosity seems pretty straightforward: it tells you how thick a liquid is, or how easily it flows. Case closed, right?

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Topics: Newtonian Fluid, Viscometers, Viscosity, Consistency, Kinematic Viscosity, Dynamic Viscosity, rotational viscometer, Liquid Properties, density, Texture Analysis, gel time

 

Liquid surface tension has a straightforward definition with a dramatic job description: it’s the force that politely stops a liquid from flinging itself off into the universe.

Measuring it, however, is far less straightforward. There are multiple ways to quantify surface tension, and they can quickly turn an easy concept into a small maze of methods. To bring some order to the chaos, this article focuses on two main measurement approaches: drop-based techniques and force-based techniques.

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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: Free Moisture, Moisture Testing, CSC Digital Moisture Balance, Moisture

 

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Topics: Micron-Sized Particles, Texture Analysis, bound water, Mixers, Planetary Centrifugal Mixer, Centrifugal Mixer, planetary mixer

Shear Stress - Shear Rate

Viscosity! If you ever think about it, what do you see?

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Topics: Newtonian Fluid, Viscometers, Dynamic Viscosity, viscometer, rotational viscometer, Viscosity Stress, Viscosity Shear Rate, Non Newtonian

As followers of these rants know, we manufacture and distribute tensiometers. As a tensiometer manufacturer, we are often asked, “if I am going to replace my tensiometer, which one should I get?”

Let's explore the alternatives and compare their respective capabilities.

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Topics: Wilhelmy Plates, Automatic Digital Tensiometer, duNouy Rings, Tensiometer, Surface Tension Measurement, Surface Tension, Fisher Tensiomat, Tensiomat Trade-In, Liquid Properties, Digital tensiometer, automatic Tensiometer

The Need for Mid-Point Sieves

ASTM and ISO establish standards for the acceptable range of openings in a wire mesh sieve. For larger mesh sizes, the variation between the largest and smallest acceptable openings has little impact on sieve performance. However, as mesh sizes decrease, the potential for performance differences between sieves becomes significant. These discrepancies, especially when an old sieve is replaced in a master stack, can lead to problematic QC data. Mid-Point sieves can help alleviate this issue.

What is a Mid-Point Sieve?

A mid-point sieve has had the mesh inspected after mounting. The sieve is then selected as a mid-point if the results give tolerances that are in the middle of the ASTM standard. 

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Topics: Sieve Certification, Sieving Process, Sieve Analysis, Sieve Quality