How to Choose a Moisture Analyzer

What is a Moisture Analyzer?

You’ll want to consider the following criteria when choosing a moisture analyzer:

  • Resolution (also termed readability or readout)
  • Repeatability
  • Characteristics of thee product being analyzed
  • Features important to performing moisture analysis for product 
  • Specialized capabilities
  • Service and support

Chances are you experience “moisture” beyond high humidity on hot summer days.  Examples include soggy potato chips (too much) and crumby brownie cookies (too little).  Moisture content plays a critical role in most every aspect of life.  That’s why researchers, QC and government agencies rely on moisture analyzers to insure products meet moisture content specs in manufacture and in shelf life. This post provide you some useful purchasing tips for moisture analyzers.       

Why Purchase a Moisture Analyzer?

Safe-moisture level is a level of moisture low enough to prevent the growth of undesirable microorganisms in the finished product under the intended conditions of manufacturing, storage, and distribution.” according to Title 21 of Read the rest

Moisture Balance Ideal for QC in Molding Plastics

Moisture Balance Ideal for QC in Molding Plastics

Operators of extrusion molding, injection molding, thermoforming and related equipment must pay particular attention to resin moisture content because too much or too little moisture will impact the quality of molded products.  Correct moisture content depends on the resins being used and is specified by plastic resin manufacturers.    

Resin manufacturers may ship product at the correct moisture content but equipment operators should take steps to ensure ambient conditions at the plant do not raise or lower the content prior to processing.  Two important steps in quality control are proper resin storage and using commercial drying ovens.  Periodic checks with a benchtop moisture analyzer programmed for plastic resins provide assurances that moisture content is on target, or otherwise call for pre-processing adjustments.

The Benchtop DSC 71P Lab Moisture Analyzer for Quality Control

Operating on the LOD (loss of weight on drying) process it handles samples to 71 grams and delivers … Read the rest

How to Select a Moisture Analyzer for Low-Moisture Plastic Resins

DSC 71P Moisture Analyzer
DSC 71P Moisture Analyzer

When you select a moisture analyzer for low-moisture plastic resins you will need a model that that not only can quickly but also accurately gauge the moisture content of these resins.   And as with many quality control requirements that involve moisture content, you’ll want a moisture balance that can meet standards set by trade associations and professional organizations.

In this post you’ll get a briefing on the following:

  • why low moisture content is important in plastic resins
  • a technical standard that applies to determining moisture in plastics
  • how benchtop moisture analyzers work
  • a standards-compliant moisture analyzer
    for plastic resins

Why Low Moisture Content is  Important

Owners of injection molding companies and operators of injection molding machines are aware that incorrect moisture content in plastic resins can result in an inferior finished product.

Product shipped from resin suppliers may have the specified moisture content but ambient conditions … Read the rest

Stability Testing for Temperature and Humidity

Stability Testing for Temperature and Humidity

Stability testing is a critical part of drug and medicinal product development to determine the shelf life of such products under a variety of environmental conditions such as temperature and humidity.  Family prescriptions likely have on their label a recommended “use by” date and notification if special storage conditions should be observed. The regulatory mandate for stability testing in the United States is contained in 21 CFR Part 211 Section 166.

Tests to determine storage requirements and shelf life for drugs and other medicinal products are taken under a variety of imposed and tightly controlled environmental conditions.  Because testing time can be extensive accelerated studies are permitted to support tentative expiration dates provided full shelf life studies are being conducted.


Temperature and Humidity Test Chamber Specs

Stability testing is performed in specially designed test chambers capable of duplicating a broad range of temperature … Read the rest

Environmental Test Chamber Series with Ultrasonic Humidifiers

A new series of environmental test chambers now available from Tovatech in 4 storage capacities from 24 to 80 cubic feet feature ultrasonic humidifiers producing far smaller water particles than centrifugal humidifiers.  The ultrasonic humidifiers are placed above rather than inside storage cabinets thereby freeing space for additional test specimens.   Dehumidification is handled by a separate latent coil.  Both systems are operated by a programmable logic microprocessor controller.

The ultrasonic humidifiers require water with low mineral content delivered at 10 to 60 psi.  As a means of conserving this water an optional purification system for tap water is available.  Connected to the temperature humidity stability test chamber it continuously recycles used water drawn from the unit’s pluggable interior drain.

The system delivers a humidity variation of ±3% in the humidity controlled temperature range between 10⁰ and 70⁰C.

Precise temperature control at ± 0.5⁰C from 4⁰ to 70⁰C is also supported … Read the rest

A Moisture Analyzer for Shampoo Quality Control

Most everyone has their favorite shampoo and probably pays little attention to what’s inside the tube or bottle – only that it does a good job cleaning hair.  Chances are the thickness of the shampoo is important as well – cheaper brands that are thin and watery usually don’t pass muster.  Yet water, specifically deionized water – comprises about 70 to 80% of the shampoo formulation with the actual target specified by the manufacturer.  Keeping formulations on target is eased with a moisture analyzer for shampoo quality control.

While formulations vary, the approximately 25% non-water contents of shampoo include detergents and surfactants, foam boosters, thickeners and conditioners.  Preservatives and modifiers, fragrances and dyes are typically added to the batch then mixed.  After the mixing period samples are sent to the quality control lab.  Among other tests QC personnel can use a moisture analyzer to determine that the water content is … Read the rest

Selecting a Moisture Analyzer Drying Process

Infrared moisture analyzers such as the new Kern MLS-C now available from Tovatech use the thermogravimetric drying process to calculate the moisture content of a sample.  Also called the loss of weight on drying (LOD) method, the drying process compares the weight of a sample after drying to the weight before drying.  The difference is displayed the percent of moisture in the sample.  This is a critical quality control step to confirm that commercial bulk drying ovens are performing to specification and that the product meets regulatory or industry standards for moisture content.

Selecting the Moisture Balance Drying Mode

Because products react differently to heat employed during the drying process, laboratory moisture balances can be programmed for different drying modes or drying profiles.  These can be classified as standard, rapid, step and gentle. The mode is graphically displayed on the control panel. Here is a general description of each:

  • Standard
Read the rest

Moisture Balance Helps Test Compost Moisture Content

Moisture Analyzer for Compost Testing
Moisture Analyzer for Compost Testing

The use of compost is increasing with the growth in demand for organically grown food.  Composting however has a dark underbelly.  If done improperly it can result in the retention of pathogenic bacteria harmful to humans.  This in turn will (and has) result in food borne illnesses which ironically is what the organic food movement is trying to avoid.  In the past, researchers have used ammonia supplementation and irradiation to reduce pathogenic activity.  This study looks at the use of bacteriophages in reducing Salmonella with successful results.  Within 4 hours of treatment a ‘2-log-unit reduction of Salmonella’ was observed. As usual we’d like to note the use of the moisture analyzer in measuring moisture in samples.

For further information visit… Read the rest

Moisture Balance Aids Quality Assurance in Ethanol Production

Since we are on the subject of extracting fuel from DDGS residues I thought it might be a good idea to take a look at the entire production process of ethanol. This video gives a good overview. And right at about 2:20 we have the explanation that shows how we get the DDGS residues. These by products are either sold as livestock feed or further processed to extract residual fuel. In any event, what I’d like to note is the role of moisture analyzers. While not directly mentioned in this video, moisture analyzers are critical to ensuring quality and an integral part of the production process.… Read the rest

Moisture Balance for An Alien Planet – Amazing Space Tech

Moisture analyzers on earth can use gravimetric methods like loss on drying to measure the moisture content in a sample.  However, what do you do when you need to measure atmospheric moisture content and that too on a different planet?  This paper examines the working of the moisture meter used in the spacecraft Vega 1 and 2 sent to Venus.  This is another fascinating insight into space technology.  Consider that the spaceships have to travel through space before plunging into the Venusian atmosphere.  Sensors and other instruments are built to withstand the harsh extremes of temperatures in space. That in itself is a feat of engineering par none.

For further information visit… Read the rest