High-performance microscope for wear and particle analysis

Here's how counting works under a microscope

Particle counting quantifies the number and size distribution of solid contaminants within a sample. Microscopic examination provides detailed visualization: an accurately measured sample aliquot is vacuum-drawn through a fine-pore membrane. While the lubricant base fluid passes through, solid particles are retained on the membrane surface. This approach ensures detection of only genuinely solid particles.

An automated motorized stage subsequently traverses the membrane in sequential fields. High-performance optics and a high-resolution camera system acquire images of individual particles, which are then quantified and dimensionally analyzed by image processing software – with reliable detection capability from 2 µm onwards.

Where the microscope is used

The new microscope system is particularly utilized in applications that exceed the capabilities of laser particle counting: water-based hydraulic fluids, heavily soiled metalworking fluid samples, and examination of filter cakes and sedimentary deposits."

A key advantage is that particles undergo not only quantitative and dimensional analysis but also optical characterization. Metallic particles, translucent dust particles and fibrous contaminants can be selectively differentiated and classified. Their distinct optical and morphological properties furnish critical diagnostic information regarding contamination sources."

The new instrument delivers enhanced stability and reliability for microscopic particle counting, while its image analysis software expands evaluation capabilities. Customers continue receiving membrane microscope images along with graphical particle count analysis in their laboratory reports.