How Tubing Affects Particle Counts

Sample tubing and particle loss is affected by the following mechanisms:

  • Diffusion
  • Thermophoresis
  • Sedimentation
  • Turbulent inertial deposition
  • Inertial deposition at tube bends
  • Sample tube diameter
  • Charged particle loss
  • Sample size

As you can see, there are a lot of mechanisms! The good news is that they have all been well studied and modeled to better help us understand how they can be a significant factor of variation between sampling or transport schemes. Read more about each mechanisms below.

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Polymers as stabilizers: What impact on Stability?

courtesy of Formulaction
Nowadays, chemists and formulators have access to a huge range of stabilizers and additives to reach their specifications and enhance dispersion properties. A majority of these additives are polymers or biopolymers. They have been used for decades and still, today, offer tremendous opportunities to move toward greener, healthier, and more efficient formulations. They are very promising due to their impact on multiple properties (viscosity, dispersibility, stability), reducing the number of ingredients in formulations, and providing benefits on multiple fronts.

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Cleanroom Monitoring Series

courtesy of Particle Measurment Systems

Discover free contamination control educational materials, created by industry experts.​​​

Cleanroom Classification, Qualification, Monitoring: Annex 1 Requirements for Particle Monitoring.

Get the latest Annex 1 draft insights on definitions and guidance regarding Cleanroom Classification, Qualification, and Monitoring.







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Particle Measuring Systems announces the release of the Lasair® Pro Airborne Particle Counter

Lasair Pro 400x298New Airborne Particle Counter Provides Flexibility While Meeting and Exceeding Data Integrity Requirements

 Boulder, CO – Particle Measuring Systems (PMS) announces the release of the new Lasair® Pro Airborne Particle Counter. Leveraging the engineering of its flagship Lasair III particle counter, this newest addition to the PMS fleet supports a variety of applications including clean area monitoring (portable and remote) and classification while meeting international cleanroom certification standards.

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In-situ monitoring of curing & drying from RT to 250°C

courtesy of Formulaction

The Rheolaser COATING High Temperature allows to monitor in real time the curing and drying processes of your materials from RT to 250°C in a controlled temperature and humidity chamber. Nowadays, various industries are challenged to provide more competitive and more environment friendly materials. They are constantly on the lookout for innovation and the formulation and reformulation of new materials. Thus, the characterization of these innovative formulations is a key point to control.

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Challenging development of wax containing cosmetics

Courtesy of Formulaction 

The development of new cosmetic products has become challenging due to various changes in consumer behavior. Cosmetic products must fulfil ethical, ecological and natural standards in the same way as they should be highly performing and stable. Especially semi-solid and solid cosmetics with a high amount of waxes (creams, lipstick, ointments, …) need special attention.

The use of waxes needs specific preparation temperatures above the melting point to obtain stable emulsions and homogeneous mixtures. Cooling ramp and preparation method impact the crystalline structure of the final product. Moreover, stability is increased and need longer evaluation periods, resulting in longer time to market. 

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New ISO 11171 Standard Reference Material

courtesy of Pamas GMBH

1619087617619PAMAS is delighted to announce that it has received its first delivery of the newly certified Standard Reference Material SRM 2806d from the National Institute of Standards and Technology (NIST). The new suspension material is currently been extensively tested in the PAMAS laboratory. All PAMAS master systems will be converted to the new reference material as soon as these tests are completed.

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Micron Scientific gets a new Facebook page


Micron Scientific's origional Facebook page has been dormant since Aug 2020. Today we launched an updated Facebook page called Micron Scientific - South Africa 

We will add new webinars, photos , video's as well as posts as you would expect from a Facebook page. Visit and l Like us !



Successfully Implementing a Cleanroom Facility Monitoring System

courtesy of Nina Morton, Particle Measurement Systems

How Particle Measuring Systems Support Pharmaceutical Cleanroom Monitoring After deciding on a cleanroom Facility Monitoring System (FMS) it is time to implement it. Many things can go wrong. You want an implementation that does not negatively impact production, that is smooth and successful, and is ready to hand off on schedule. Eric Gottlieb talks to Blu Buquoy about […]


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Surface Tension of molten material

Electrical needle heating device NHD 700Have you ever thought that it is possible to measure the surfacetension of molten material with the pendant drop method upto 700°C (973 K)? Or measure #wettability of molten alloy or polymers up to the same temperature?

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Dairy product characterization

courtesy of Formulaction

In 2015, Formulaction started a collaboration with the Engineers School Purpan (Toulouse, France), which over the years showed promising results on how to use the Rheolaser Master in dairy product characterization. We saw an opportunity to join our knowledge of scientific instrumentation with the expertise of dairy systems of the Engineers School Purpan. This two-year research project Rheolact’ was co-funded by the French Occitanie Region and the European Union and with the support of a regional cheese company, Marzac (Revel, France). The aim is to study gel formation, which occurs during yogurt and cheese preparation, with two main objectives, define the impact of proteins and starters on the textural properties of yogurt systems, and defining the coagulation time to optimize cheese yield. 

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Importance and Benefits of the New MiniCapt Mobile Antibacterial Active Air Sampler

courtesy of Particle Measurement Systems

Giulia Artalli, Micro & Sterility Global Product Line Manager at Particle Measuring Systems, discusses the regulatory importance and benefits of the MiniCapt Mobile product features that were recently released.

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Purity analysis of jet fuel according to DEF STAN 91 – 091

Pamas S40 and SBSS

by Albrecht Truter

Sometimes it is easy to think that a portable instrument is a compromise in terms of testing accuracy relative to a benchtop instrument. In the case of Pamas instrumentation that is certainly not the case!

The Pamas S40 is a portable liquid particle counter that meets the same ISO 11171:2016 calibration standard as the benchtop SBSS. The same sensor is used in both instruments.



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Successfully Implementing a Cleanroom Facility Monitoring System

courtesy of Nina Morton ( Particle Measurement Systems)

After deciding on a cleanroom Facility Monitoring System (FMS) it is time to implement it. Many things can go wrong. You want an implementation that does not negatively impact production, that is smooth and successful, and is ready to hand off on schedule. Eric Gottlieb talks to Blu Buquoy about some of the possible roadblocks and how the team Particle Measuring Systems (PMS) prepares for a successful FMS implementation.

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Laser-optical particle counting compared to pore blockage technique

article courtesy of Pamas GMBH

Fluid contamination can be measured by various different analysing methods. In this blog post, we compare the laser optical method of light extinction against pore blockage.

How does the Light Extinction method work?

The illumination source is a laser diode. The laser light beam is collimated by a lens array and formed to a straight and flat beam focused by a transfer optic at the orifice. The beam passes through the measuring cell and interacts with a photo diode. The photo diode measures the light intensity behind the contaminated fluid stream in the orifice. The photo diode operates in a photo conductive method which delivers a current proportional to the incident light intensity. Each single particle flowing through the measuring cell creates a change of current on the photo diode; the sensor electronics evaluate this change of current as a particle signal. The shadow surface represents the size of the particle.

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On-Demand webinars from Formulaction

Formulaction the leader in stability analysis of concentrated dispersions recently made their most popular webinars available on demand.  These webinars give a practical insight in their unique technologies for stability monitoring, high shear viscosity measurements, micro-rheology and thermal analysis. 

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Particle sizing or Particle Counting ?

written by Albrecht Truter

I'm frequently asked how much sample we require for laser diffraction particle size analysis. I suspect  in many cases I'm asked simply because my customer suspects they might have to little sample for the test!

In any case for a dry sample we ask for at least a couple of grams of sample (about a teaspoon).  For realy fine material ( less than 100 um) we can even measure 0.2 g of sample although it is not ideal. Of course if the size distribution starts at  0.5 um and stretches to 2- 3 mm we prefer a teaspoon size sample !

We are also frequently asked to measure water samples from clean  drinking water to turbid raw or even waste water.

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Particle Measuring Systems Releases Microbial Monitoring Instrument With Antibacterial Housing

New MiniCapt® Mobile microbial contamination monitoring instrument now with antibacterial housing to further reduce contamination introduced during monitoring activities.    

January 26, 2021 Boulder, CO – The MiniCaptMobile Microbial Air Sampler with a new antibacterial housing from Particle Measuring Systems (PMS) leverages the latest technologies in material science and antimicrobial design to help prevent the introduction of bacterial contamination created during monitoring activities.  The robust antibacterial enclosure is easily disinfected and designed to eliminate sites for bacterial deposits and biofilm formation. 

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Differences in Aerosol Particle Counter Results

So you’ve just bought a new particle counter, you’re testing it with your fleet, and… the counts don’t match. Does this mean there’s something wrong? What happened? Why is there a difference? And is there anything you can do? We’ll discuss all of this and more in this week’s handy blog.

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Top 3 webinars from Particle Measurement Systems

courtesy of Particle Measurement Systems

Grab a cup of coffee and check out the most frequently viewed Particle Measuring Systems Webinars for 2020! Learn more about EU GMP Annex 1, Active Air Sampling, Particle Counting Variation and more!

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