CSC Scientific Blog

A blog about test equipment

CSC Scientific Blog

How Density Testing Got Easy

Posted by Art Gatenby on Sep 25, 2018 3:20:03 PM

The first recorded application of density measurement was for fraud detection. The density measurement concept then expanded to encompass determination of material composition and assessment of product quality.

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Topics: oscillating u-tube, liquid density, density, hydrometer

Surface Tension by duNouy Rings or Wilhelmy Plates – Which to Choose?

Posted by Art Gatenby on Jul 16, 2018 5:34:18 PM

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.

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Topics: Surface Tension, duNouy Rings, Wilhelmy Plates, Tensiometer, Liquid Properties, automatic Tensiometer, Digital tensiometer, interfacial surface tension, surface tension instruments, surface tension analysis

Do You Know If Your Test Sieves Are Doing the Job?

Posted by Art Gatenby on Jul 12, 2018 8:00:00 AM

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.

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Topics: test sieve equipment, sieve mesh, Quiet sieve shakers, RoTap, ASTM, Mid-Point Sieves, Sieve Certification, Sieve Calibration, Particle Size Analysis, Sieve Testing, Sieving Process, Sieve Shakers, sieving

Four Reasons Why Food Manufacturers Should Monitor Moisture

Posted by Amanda Ranowsky on Mar 12, 2018 8:00:00 AM

Moisture content is a critical factor to consider in the food industry. The amount of water in a product affects the product’s texture, shelf life, ease of processing, and cost to produce. Snack foods, baked goods, pet food, and dried goods are just a few examples of products that are vulnerable to moisture content issues like these. In many cases, an easy loss-on drying (LOD) test will allow you to monitor the moisture content of these products. (See the 3 Easy Steps to Run a LOD Test here.
 
Simple moisture analysis can be all it takes to improve the quality of your product. Let’s take a closer look at how moisture content affects each of these four product and production aspects.
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Topics: moisture content, moisture balance, Loss-On-Drying, moisture measurement, fast moisture test, Moisture Oven Test, Moisture, CSC Digital Moisture Balance, Moisture Testing, Moisture Analysis

Sensational Food Texture - What is It? - How to Analyze it?

Posted by Amanda Ranowsky on Feb 13, 2018 6:30:00 AM

“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. 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.

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Topics: Texture Analysis

Density - Who Cares? Maybe You Should.

Posted by Art Gatenby on Dec 7, 2017 12:31:49 PM

We’ve all heard of Density since general science class in middle school. "The weight of a 12 ounce Coke." That’s pretty simple.

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Topics: liquid density, density, oscillating u-tube, Liquid Properties

What are Liquid Properties? Why Should Anyone Care?

Posted by Art Gatenby on Aug 10, 2017 2:59:24 PM

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

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

How Long Does a Water Activity Test Take?

Posted by Amanda Ranowsky on Jul 27, 2017 8:00:00 AM

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.

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Topics: Bound Moisture, Free Moisture, Moisture, Moisture Analysis, Water Activity, water activity measurement

How Much Do Rotational Viscometers Cost - And Why?

Posted by Amanda Ranowsky on Apr 19, 2017 8:15:00 AM

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.

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Topics: rotational viscometer, Viscosity, Dynamic Viscosity, Viscometers, Liquid Properties

How to Get Consistent and Accurate Test Results with a Rotational Viscometer

Posted by Amanda Ranowsky on Mar 22, 2017 8:00:00 AM

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.

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Topics: Dynamic Viscosity, Viscometers, Viscosity, Measure Viscosity, rotational viscometer, Liquid Properties

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