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Residual dirt analysis

Cleanliness testing of precision parts and filters

Man cleaning off redidual dirt

Residual dirt on surfaces from production processes impairs the function of electronic or technical components. DEKRA offers accredited residual dirt analysis of the nature, quality and origin of residual dirt according to customer specifications for manufacturers, suppliers, part cleaners and users of the relevant components.

Range of residual dirt testing services:

  • Technical cleanliness according to VDA 19 / ISO 16232
  • Filtration and gravimetric determination of residual dirt quantity
  • Residual dirt analysis / classification of particle sizes and particle distribution
  • Identification and automatic listing of metallic and non-metallic particles, fibers and organic residues
  • Particle analysis using EDX (scanning electron microscopy)
  • Determination of organic impurities and identification using infra-red spectroscopy (ATR IR microscope) and gas chromatography
  • PWIS (LABS) test (paint wetting impairment substances, VDMA 24364)
  • Particles in hydraulic fluids (ISO 4406 / ISO 4407)
  • Cleanliness of charge air coolers (SAE J 1726)
  • Air extraction of air-ducting components
  • Other extensive material tests and damage analysis

The accredited laboratory in Stuttgart offers you recognized and meaningful residual dirt analysis and DEKRA test reports – safe, fast and reliable.

Our experts will be happy to advise you.


DEKRA Automobil GmbH

Handwerkstr. 17

70565 Stuttgart


Laboratory for environmental and product analysis

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