High-precision contamination monitoring for critical fluid systems
Contamination control is essential for hydraulic systems, turbines, and lubricated machinery. The DFYF-J4 Benchtop Oil Particle Counter provides fast, accurate, and standardized particle counting – helping you maintain fluid cleanliness, reduce wear, and extend equipment life.
Designed in accordance with GB/T 18854-2002 (ISO 11171-1999) and compatible with major international standards, this instrument uses the light extinction (optical obscuration) method to measure solid particle contamination in hydraulic oils, lubricants, fire-resistant fluids, insulating oils, and turbine oils.
Key Technical Specifications
Parameter | Value / Description |
Light source | Semiconductor laser |
Particle size range | 0.8 µm – 600 µm (sensor-dependent) |
Sensitivity | 0.8 µm (ISO 4402) or 3 µm(c) (GB/T 18854, ISO 11171) |
Detection channels | 8 channels, freely configurable |
Resolution | Better than 10% (GB/T 18854, ISO 11171) |
Repeatability | RSD < 2% |
Max. viscosity | 350 cSt |
Sample volume | 0.2 ~ 1000 mL (user-selectable) |
Sampling accuracy | Better than ±1% |
Sampling speed | 5 ~ 80 mL/min |
Vacuum chamber (max.) | 0.08 MPa |
Pressure chamber (max.) | 0.8 MPa |
Coincidence error limit | 10,000 particles/mL |
Power supply | AC220V, 50 Hz |
Core Advantages – Engineered for Real-World Labs
1. High-precision laser sensor
Wide detection range, low noise, excellent stability, and high resolution – ensuring reliable results even for critical applications.
2. High-pressure syringe pump sampling
Fixed sample volume with stable flow rate and high accuracy. User-defined volume settings provide flexibility for different test requirements.
3. Integrated air-purge & positive/negative pressure system
Built-in de-gassing capability. Suitable for samples with different viscosities, including difficult-to-test fluids.
4. Corrosion-resistant fluid path
Sampling slit and tubing made of imported 316L stainless steel and PTFE – safe for corrosive oils such as phosphate esters (e.g., aviation blue hydraulic fluid).
5. Multi-standard calibration compatibility
Pre-loaded with multiple built-in calibration curves, supporting all common international standards. Custom calibration available on request.
6. Pre-loaded contamination standards
Includes GJB-420B, NAS1638, ISO 4406, TC17216-71, and more. Also supports user-defined standards – configure the limits you need.
7. Intuitive touchscreen operation
Full-color touchscreen with Chinese/English input. Fully automated operation, data storage, and built-print function.
8. PC connectivity
RS232 interface for connection to a computer or laboratory data management platform.
Typical Applications
Hydraulic oil, lubricating oil, and turbine oil cleanliness monitoring
Fire-resistant fluids (including phosphate esters)
Insulating oils for transformers
In-coming and in-service oil quality control
Maintenance programs in aviation, power generation, manufacturing, and marine sectors
Ideal for:
Oil analysis laboratories, third-party testing centers, equipment OEMs, power plants, steel mills, and any facility where fluid cleanliness is critical.
Why Choose the DFYF-J4?
✔ High accuracy & repeatability – RSD < 2%, resolution better than 10%
✔ Wide particle range – from 0.8 µm to 600 µm, covering fine silt to large contaminants
✔ Handles viscous & corrosive oils – up to 350 cSt; compatible with phosphate esters
✔ Flexible standards – NAS1638, ISO 4406, GJB-420B, TC17216-71, and custom standards
✔ Automated & easy to use – touchscreen, pre-set standards, data storage, and print
✔ Built for durability – 316L/PTFE fluid path, robust pump and pneumatic system
Get a Quote
Ensure your fluid systems stay clean, reliable, and compliant. Contact us today for technical datasheets, pricing, and customization options.
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DFYF-J4 – Precision particle counting you can trust.
