Gravimetry:
Evaluation of the cleanliness analysis
Gravimetry is a proven method for evaluating the technical cleanliness of components, which is based on determining the mass increase of extracted particles. A special analysis filter is used to collect the dirt particles from the test object. The filter is first weighed on a high-precision precision scale before filtration (initial weighing) and then again after filtration (final weighing). The difference between the two measurements gives the mass increase, which represents the amount of particle load in milligrams.
With a resolution of 0.01 mg on our Sartorius precision scale, this method enables the dirt mass to be recorded precisely. As part of the residual dirt analysis, gravimetry provides reliable information about the total mass of the extracted particles. A disadvantage of the method, however, is that it does not provide any information about the size distribution of the particles, but only indicates the mass in mg.
Light microscopy (LM):
Precise particle analysis for technical cleanliness
Light microscopy is an indispensable method for evaluating analysis filters in residual dirt analysis. It can be used to precisely count and measure the particles extracted during filtration. The result of this analysis provides not only the number but also the size distribution of the detected particles on the filter. This enables a well-founded assessment of the damage potential of the particles and contributes to compliance with the requirements for technical cleanliness according to ISO 16232:2018.
Particle detection in light microscopy is based on a brightness contrast between the particles and the membrane of the analysis filter. Metallic shiny particles are selected using polarized light and can be distinguished from non-shiny particles and fibers. This system categorizes the particles into metallic shiny, non-shiny and fibrous, which enables a detailed residual dirt analysis in the laboratory.
Our technical equipment includes two light microscopes from JOMESA:
Light microscopy at the highest level with JOMESA: Innovative technology opens up new possibilities
When it comes to making the smallest structures visible, light microscopy is the best choice for cleanliness testing. With high-quality lenses and the latest technology, it enables strong magnification that makes even the finest details visible. Manufacturers such as JOMESA use the laws of optics and the refraction of light in glass lenses to achieve precise results. Through continuous development and improved contrasts, light microscopy has been able to clearly display ever finer structures in recent decades and set new standards in particle analysis.
JOMESA is a leading provider of light microscopy for residual dirt analysis and is setting new standards in filter analysis with high-quality lenses, technical innovation and the specially developed PicEd software. The software, which has been continuously developed since 1987, enables precise, automated particle analyses and helps companies comply with strict cleanliness requirements. With constant innovation and a high level of vertical integration, JOMESA has established itself as a pioneer worldwide and offers flexible solutions that can be adapted to constantly new standards and requirements.
Advantages of light microscopy in residual dirt analysis
Light microscopy offers companies the following advantages in residual dirt analysis:
- Precise measurement and counting of particles on the analysis filter
- Assessment of the damage potential by recording the particle size
- Categorization of the particles into metallic, non-shiny and fibrous
- Use of the latest technologies and automated analysis processes with JOMESA and PicEd software
Light microscopy is the optimal method for filter evaluation in order to ensure technical cleanliness and identify potential risks at an early stage. By precisely measuring and evaluating the number and size of particles, companies can take targeted measures to ensure the cleanliness and functionality of their components.
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