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.
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
Topics: Free Moisture, Moisture Testing, CSC Digital Moisture Balance, Moisture
Topics: Micron-Sized Particles, Texture Analysis, bound water, Mixers, Planetary Centrifugal Mixer, Centrifugal Mixer, planetary mixer
Topics: Newtonian Fluid, Viscometers, Dynamic Viscosity, viscometer, rotational viscometer, Viscosity Stress, Viscosity Shear Rate, Non Newtonian
Let's explore the alternatives and compare their respective capabilities.
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
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.
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.
Read MoreTopics: Sieve Certification, Sieving Process, Sieve Analysis, Sieve Quality
Discover the significance of platinum in du Nouy Tensiometer Rings and its impact on accurate surface tension measurements.
Read MoreTopics: duNouy Rings, Surface Tension, interfacial surface tension, tensiometers, du Nouy tensiometer, water content measurement, walk on water, segmentation
Regularly I’m asked the question; “How accurate is this moisture balance?”
The questioner asks for the answer in terms of percent (%) moisture. When I answer “it depends”, I always get the unspoken response, “Why did I ask this stupid idiot?”
When inquiring about the precision of measurements such as weight or temperature, the responses are clear-cut and tied to the accuracy of the instruments. For instance, 25 grams or 50 degrees with a margin of plus or minus (+/-) 0.1 gram or 1/2 degree.
When questioning the accuracy of your percentage reading, the answer can be quite complex. This complexity arises from the fact that percentage (%) is a relative measurement. Take, for example, the outcome of a Loss on Drying (LOD) moisture test, which is heavily influenced by the size of the sample used.
To better grasp this concept, consider how the result of an LOD moisture test is derived. It involves subtracting the weight of the sample at the end of the test from its initial weight, and then dividing this difference by the original weight of the sample. This calculation ultimately yields a % moisture reading.
The upcoming analysis will shed light on the impact of both sample size and instrument precision. We will delve into a sample containing 23.5% moisture, examined using an electronic LOD moisture balance with a sensitivity of 0.001 grams and a repeatability of +/- 0.005 grams.
Topics: Moisture Analysis, Moisture Testing, CSC Digital Moisture Balance, Loss-On-Drying, Moisture, moisture balance, instrument accuracy
The ongoing debate between the value of a sieve certification process and sieve calibration has long intrigued me.
Topics: Sieve Shakers, Mid-Point Sieves, Particle Size Analysis, Sieve Calibration, Sieve Testing, Sieves
I'm sure many of you have felt the jolt of static electricity when walking on a cozy wool rug in the winter and then reaching for a metal door knob. This same static electricity can cause chaos in your sieving process.
Topics: Sieve Blinding, Agglomeration, Sieve Testing, Sieves, Particle Size Test, electro static
CSC Scientific Company, Inc
2799-C Merrilee Drive
Fairfax VA, 22031
800-621-4778
703-280-5142 (fax)
csc@cscscientific.com
No part of this page or any other page in this site may be copied or reproduced in any way.
