CSC Scientific Blog

A blog about test equipment

Art Gatenby

Manufacturer of test equipment. The Company specialized in the measurement of Moisture, Particle Size and Surface Tension. In these areas CSC Scientific serves the Food, Chemical, Pharmaceutical, Petroleum, Waste Water, Mining, Power and similar industries.
Find me on:

Recent Posts

How to Get Real Water Activity (Time vs Precision)

Posted by Art Gatenby on Aug 17, 2021 2:00:38 PM

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.

Read More

Topics: Water Activity, stop mold, chilled mirror, aw

Mixing It Up Inside A Karl Fischer

Posted by Art Gatenby on Jul 7, 2021 5:46:23 PM

 When people are looking for a way to measure small amounts of moisture, we often recommend the Karl Fischer method.

What is Karl Fischer?

Read More

Topics: Karl Fischer, Karl Fischer Titration

Moisture Test Results Don't Always Measure Moisture

Posted by Art Gatenby on Jun 29, 2021 7:00:00 AM

The most popular was to measure include:

  1. Drying the material and measure the weight loss 
  2. Using a calibration and electronic instrument 
  3. 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.

Read More

Topics: Evaporation, Moisture Oven Test, Infrared Moisture, Moisture Analysis, Moisture Testing, Karl Fischer Titration, Loss-On-Drying, evaporator oven

Liquid Surface Tension and Interfacial Tension Between Liquids

Posted by Art Gatenby on Jun 24, 2021 3:34:00 PM

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.

Read More

Topics: Surface Tension Measurement, Surface Tension, interfacial tension, interfacial surface tension, surface Tension Testing, du Nouy Ring Method, du Nouy tensiometer, Liquid Properties

Shear Rate - What is it? - Should You Care?

Posted by Art Gatenby on Apr 14, 2021 7:00:00 AM

Shear Stress - Shear Rate

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

Read More

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

Surface Tension - Rings, Bubbles, Drops, and Plates

Posted by Art Gatenby on Oct 19, 2020 4:12:12 PM

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.

Read More

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

What is the Difference Between Dynamic and Kinematic Viscosity?

Posted by Art Gatenby on Oct 19, 2020 3:30:00 AM

At first glance, viscosity seems like a fairly simple concept. It helps describe how thick a product is, or how well it flows. That's all, right?

In reality, there are several different terms that come under the heading of viscosity. These terms are derived from how the viscosity is measured. When people talk about viscosity, they are talking about one of two things: kinematic viscosity or dynamic viscosity.

It's not easy to find a lot of information on the differences between dynamic and kinematic viscosity. This is my attempt to bring clarity to these two principal concepts.

Read More

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

Walk On Water??? Really??? Surface Tension Says Yes!!!

Posted by Art Gatenby on Oct 14, 2020 4:04:16 PM

Yes, you can walk on water: with Surface Tension.

Read More

Topics: Surface Tension Measurement, tensiometers, surface tension instruments, surface tension analysis, walk on water

Sieve Calibration Is the Holy Grail!

Posted by Art Gatenby on Oct 13, 2020 5:30:00 PM

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.

Read More

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

Can We Fix The Problems Of Sieve Certification?

Posted by Art Gatenby on Aug 31, 2020 5:11:00 PM

You may remember Pequeño and his family of very small 150 micron (150µ) particles being very determined to defeat sieve certification.

Read More

Topics: Calibration, Particle Size Analysis, Sieve Calibration, Sieve Certification, Sieve Testing, Sieves, Sieving Process, Sieve Analysis, Sieve Quality

Subscribe via E-mail

Search the Blog

Most Popular Posts

Posts by Topic