Particle monitoring and assembly cleanliness


Environmental factors in assembly, in a cleanroom or sterile room

In your production there is a source of contamination but you do not know where it is?
Or you want to ensure thorough assembly cleanliness? There are unfortunately many possibilities for ambient contamination. The direct causes include sources in the production environment such as building services or internal logistics. Indirect sources include load carrier management, external logistics, as well as the assembly technology or methodology applied.

+49 7022 2796-681


Whether internal transport routes, windows, open entrances or particle precipitation due to abrasion: with our particle traps we check your entire production line, highly sensitive cleanrooms and sterile rooms. We then examine the particle traps in our accredited laboratory and count and measure the particles. In this way we can acquire and analyse the various factors in the environment almost entirely.

Assembly cleanliness in accordance with VDA: technical cleanliness verification in assembly
Here we work in accordance with the standard "VDA 19.2 – Technical cleanliness in assembly". Particle monitoring is an excellent way of monitoring air particles in relation to assembly cleanliness and analysing the environmental factors affecting the cleanliness of the component.

Application: explained step by step
The adhesive traps are laid out at particle-relevant points to monitor the airborne particles. The procedure is as follows:


Particle trap, correct application: Step 1

1. Document: Note the location, date, time frame and all other relevant details on the back of each particle trap

Particle trap, correct application: Step 2

2. Check whether the protective film of the particle trap is intact

Particle trap, correct application: Step 3

3. Activate: Remove the protective film from the latch and activate the adhesive surface as follows

Particle trap, correct application: Step 4

4. Lay out: Slide the trap into the stand and place it in the predefined position

Particle trap, correct application: Step 5

5. Seal and dispatch: Close the particle trap with the frame after the display time has elapsed. Then send the traps to Quality Analysis

Particle trap, correct application: Step 6

6. Evaluate: The microscopic evaluation of the particles is carried out in our accredited laboratory

Particle stamps for monitoring component and assembly cleanliness

The handy particle stamps can be used to selectively stamp components and assembly surfaces - even in inaccessible places. The method is also suitable for process control and for oversized components that cannot be transported. The captured particles are subsequently analyzed in the laboratory. The flexible spring element of the stamp ensures uniform contact pressure, regardless of the inspector.

Application: explained step by step
The stamp is activated by removing the protective film, pressed onto the component as far as it will go and then analyzed in the laboratory after stamping. The exact application is as follows:


Particle stamps, correct application: Step 1

1. Fill in the fields on the ID card

Particle stamps, correct application: Step 2

2. Check whether the adhesive foil on the stamp is still intact

Particle stamps, correct application: Step 3

3. Activate the stamp: Remove the protective film with tweezers

Particle stamps, correct application: Step 4

4. Sample collection: Always press the stamp to the stop and do not touch the adhesive surface

Particle stamps, correct application: Step 5

5. Seal: Place the stamp back into the Petri dish and close it

Particle stamps, correct application: Step 6

6. Send the collected samples to Quality Analysis




  • Flying particles
  • Production processes and methodology
  • Internal logistic processes
  • Heating and ventilation systems
  • Natural environmental factors


  • Numerous assembly processes up to the end-product (screwing, joining, pressing, shaking)
  • Particle generation and transmission by assembly processes


  • Internal and external logistic processes
  • Load carrier management
  • Picking and making available
  • Storage


  • Possible source of contamination or also transferring agent
  • Human factors

With extensive experience and sound expertise, our experts evaluate your cleanliness requirements and assist you with the right laboratory analytics so that you can rely on excellent measurement results.

+49 7022 2796-681

DAkkS accreditation according to DIN EN ISO/IEC 17025

Accredited test laboratory
for technical cleanliness verification

Determination of technical cleanliness (TecSa) of components, systems and fluids using fluid extraction and air extraction, and evaluation with use of optical microscopy, SEM-EDX, RAMAN and FT-lR spectroscopy are accredited by Deutsche Akkreditierungsstelle GmbH (DAkkS) in accordance with DIN EN ISO/IEC 17025. Furthermore, all our other specialist areas have also been accredited.

You can read more about the advantages our accreditation offers you here: 

Find out more



technical cleanliness verification

Do you need assistance in determining assembly cleanliness? Then you have come to the right place. We will be happy to advise you on the numerous possibilities. The goal: Achieving cleanliness requirements with success.

Call us, we look forward to hearing from you!