Articles

Frequently asked questions

Is a Witness plate the same as a Partikelfalle? Yes it is. In the englisch language we talk about the plate showing the evidence of the deposition. In the german language it is called the trap for particles. Often is the “trap” even equiped with a door.  The dimensional set-up does not ensure low airflow levels when handling, therefore fibres …

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Specification of PC for PDM

Items specified 1 GB ethernetport Windows 7 X64 professional,  ultimate or windows 10 x64 professional SSD or HDD of at least  250GB Screen resolution  >= 1280 pixels width RAM memory   >= 24GB Processor of last generation but minimum  Intel i5 or up. 1 usb port 2.0

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Aseptic monitoring

IMPORTANCE OF MACROPARTICLES   (source WHO) In biopharmaceutical industrial manufacturing, the >5 μm particle size (defined as a Macroparticle in ISO 14644-1:2015) is an important size of interest. Viable microorganisms generally aggregate in chains, clusters or pairs (a colony forming units or CFU) greater than 5 μm in size. This measurement is therefore an important early indicator of a contamination problem, and …

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Illig wert

The PDM system is capable of measuring the Illig wert as invented by Hans Illig from the Daimler works in Mannheim.  The Illig wert is an automotive standard for measuring the change in surface cleanliness. For details on the method as used by Hans Illig please see the article at http://www.sauberkeit-und-reinraum.com.   As mentioned by Mr. Illig „Partikelzahl gewichtet+normiert auf 1000cm² und …

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Micro Foreign Object Debris  ( FOD ) the microscopic threat

Wear and tear  is hard to describe in terms of time, amount  and effect.  The result is debris.  It’s effect  can be enormous even at low incident rate and low amounts of particles.  A benefit of  passive witness plates is that  they are patient evidence collectors not requiring power nor attendance.  The witness plates of a PDM system can be …

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Traceable data report

Generation 3 Particle deposition monitoring and measuring equipment can generate traceable data reports.  In cooperation with Distrilab b.v. a system was developed to use NIST-traceable particles on glass witness plates. The PDM system uses the particles to   generates a NIST-traceable calibration report.  Calibration by means of NIST particles takes less than 4 minutes at max and can be done easily before starting a measurement series.  The optical measurement system of …

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Game changer in cleanroom technology

Passive and real time measurements of particle deposition will be the game changers in cleanroom technology.   Although surface cleanliness is the main reason to use cleanrooms most attention went to airborne particle measurements  instead of deposited particles measurements. Particles that do fall on the product,  especially the larger particles, harm the product quality. Even in the best clean rooms …

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Microplastic particles

Microplastic particles are often fibres. Think about clothing made of acrylic, nylon, and polyester. Fleece, trousers, blouses, socks for leisure and work. All contain a large amount of synthetic fibres and are subject to wear and tear.   See the impact of the particles on the environment.

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Witness boxes

Witness boxes are used to bring the disks to the place where to check for deposition.   Arrived at the place where to measure the box is openend for exposure of the disk.  Upon completion of the measurement intervall the box is closed. At a convenient moment in time the measurement can done.  The witness plate is a passive integrating …

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Particle deposition measurement equipment

In this article information is provided about the particle deposition meters and monitors on the market in 2017. The market is still expanding and dedicated measurement concepts are added. Please find the article here.

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