Portable Particle Size Counter STD-SL-OA63

The Portable Particle Size Counter STD-SL-OA63 is designed for on-site cleanliness inspection of hydraulic oil, lubricating oil, and water-glycol fire-resistant fluids.

By combining microscopic visual observation with standardized cleanliness grading, the instrument provides intuitive and reliable contamination analysis. It enables maintenance engineers to quickly identify particle size distribution, pollution severity, and potential contamination sources, making it a commonly used diagnostic tool for modern industrial maintenance and condition monitoring.

Applications

(1) Hydraulic systems: contamination monitoring of hydraulic oil in industrial machinery, presses, injection molding machines, and construction equipment.

(2) Lubrication systems: cleanliness evaluation of lubricating oils used in gearboxes, bearings, turbines, and compressors.

(3) Power industry: inspection of turbine oil, control oil, and fire-resistant fluids in thermal and hydroelectric power plants.

(4) Manufacturing maintenance: routine oil condition monitoring for predictive maintenance programs in factories.

(5) Aerospace and precision equipment: verification of oil cleanliness levels according to NAS and ISO cleanliness codes.

(6) Maintenance service providers: on-site troubleshooting and contamination source analysis.

Standards

(1) DL/T 432 — Determination of oil cleanliness by microscope comparison method

(2) NAS 1638 — Cleanliness requirements for hydraulic fluids (Aerospace Industries Association)

(3) ISO 4406 — Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles

(4) ISO 4405 — Hydraulic fluid power — Fluids — Method for determining particle contamination by microscopic counting

(5) SAE AS4059 — Aerospace fluid power — Cleanliness classification for hydraulic fluids

Features

(1) Direct microscopic visualization of particle contamination for intuitive assessment.

(2) Supports rapid evaluation of pollution severity and cleanliness grade on site.

(3) Capable of identifying particle size distribution within a wide measurement range.

(4) Simple operating procedure suitable for maintenance engineers and field technicians.

(5) Combines visual inspection with standardized cleanliness classification for reliable diagnosis.

Technical Parameters

Accessories

(1) Particle Size Counter main unit ×1

(2) Microscope assembly ×1

(3) Filter membranes (1.2 μm, 5 μm)

(4) Sample injection accessories

(5) User manual

Test Procedures

(1) Prepare the oil sample and ensure it is representative of the system being tested.

(2) Inject the specified minimum sample volume through the selected filter membrane.

(3) Place the membrane under the microscope and perform visual particle observation.

(4) Identify particle size distribution within the 5–150 μm range.

(5) Compare observed particle density with standard reference charts.

(6) Determine the cleanliness grade according to NAS 1638 or ISO 4406.

(7) Record results and analyze potential contamination sources.

Maintenance Information

(1) Clean the microscope lens and optical components regularly to maintain clarity.

(2) Replace filter membranes after each test to avoid cross-contamination.

(3) Store the instrument in a dry, dust-free environment when not in use.

(4) Periodically verify cleanliness grading accuracy using reference samples.

(5) Avoid operation outside the specified ambient temperature range.