When tempted to think I know all there is about surface tension measurement, further information brings me back to earth. I’m conversant with the principal applications: surfactant analysis, plating, detecting contaminants, development of ink and the like. I have assisted customers to set up and calibrate duNouy Ring tensiometers for most applications -- all the while taking for granted that the Ring technique was the method of choice -- with only infrequent questions arising about Wilhelmy Plate tensiometers.
CSC Scientific Blog
Topics: Wilhelmy Plates, duNouy Rings, Tensiometer, Surface Tension, interfacial surface tension, Liquid Properties, surface tension instruments, surface tension analysis, Digital tensiometer, automatic Tensiometer
Do You Re-Certify? Compare with a Master Stack? Check with Calibration Samples?
What Does Recertification Give?
The ASTM E-11 committee has done a great job of establishing three levels of testing. These levels show the probability of a sieve’s mesh to be within the permissible variations. These variations relate to the size of openings in wire-cloth used for test sieves.Read More
Topics: Sieve Shakers, Mid-Point Sieves, ASTM, Particle Size Analysis, Sieve Calibration, Sieve Certification, Sieve Testing, Sieving Process, Quiet sieve shakers, RoTap, sieving, test sieve equipment, sieve mesh
“It doesn’t matter how it looks as long as it tastes good.”
This statement has long been my philosophy when it comes to cooking. The dishes I create (usually) taste okay – even really yummy, occasionally – but I stink at presentation.
Family and friends are usually quite forgiving when it comes to their sensory (sight, touch, smell) experiences with a food before the first bite. They tend to ignore looks and feel, and focus on taste.
Food buyers aren’t so forgiving. If their sensory experiences don’t meet expectations, that crucial first taste will never happen. Flavor isn’t everything, either. If the food doesn’t feel right, or pleasant, the first bite will also be the last.Read More
Topics: Texture Analysis
We’ve all heard of Density since general science class in middle school. "The weight of a 12 ounce Coke." That’s pretty simple.Read More
The first question is, "What are Liquid Properties?" Are they some kind of underwater real estate?Read More
The answer to the question, “How Long Does a Water Activity Test Take?” is, as with most testing questions, “it depends.” Some water activity meters promise a test completed in a very short time; some in as little as five minutes. This time is an arbitrary selection that may or may not produce a satisfactory result.Read More
Looking at the rotational viscometers on the market today, you'd expect to see small price differences between the instruments offered by competing brands. But what if you find one viscometer priced at $2000 and another at $9000? Is the $9000 viscometer a better instrument? Why is there such a price difference between the two instruments?
Viscometer prices depend on both the make-up of the instrument's motor, and on the technical features of the instrument (temperature probe, speed range, USB compatibility, etc.). There are two main types of rotational viscometers: those using a spring motor, and those using a servo motor.
In this article, I’m going to take a look the options available for rotational viscometers, and how those options affect the price.Read More
Most rotational viscometer specifications promise high test accuracy and repeatability. However, an instrument on its own cannot guarantee accurate results. Instrument set-up and using the right test parameters are critical pieces of the puzzle.
Test parameters and turbulence are two key factors to consider when preparing to test with a rotational viscometer. The spindle, speed setting, and temperature of the product are some of the parameters that can impact test results. Additionally, turbulence in the sample’s flow during a test will distort viscosity readings. Knowing how to manage these two factors can significantly contribute to the accuracy of your testing.Read More