Oil Particle Counter - QualiOPC™ VES

Oil Particle Counter – QualiOPC™ VES

The QualiOPC™ VES Oil Particle Counter is a high-precision laboratory solution designed for detailed particle contamination analysis across a wide range of oils and industrial liquids, including high-viscosity samples. It delivers reliable particle size distribution and contamination level measurements using the light-blocking principle, supporting analysis of hydraulic oil, lubricating oil, transformer insulating oil, gear oil, aviation kerosene, organic fluids, and polymer-based solutions.

Built for advanced laboratory workflows, this system supports flexible sampling requirements and a wide range of international cleanliness standards. Its integrated pressurized and vacuum-assisted sampling system improves handling of challenging liquids by extracting high-viscosity samples and minimizing microbubble interference. The pressure sampling unit is capable of handling oils up to 400 cSt and includes a transparent viewing window for real-time sample observation.

QualiOPC™ VES is engineered to accurately detect and quantify solid particle contamination in liquid samples. By utilizing light-blocking measurement technology, it determines particle size distribution and concentration, enabling users to assess fluid cleanliness, detect contamination anomalies, and support maintenance planning as well as quality control processes.

Designed for both standard oils and complex fluid types, the system enhances laboratory efficiency through improved sample handling and stable measurement performance. Its combined pressure and vacuum functions ensure smoother extraction of difficult samples while maintaining measurement accuracy across diverse testing conditions.

Oil Particle Counter – QualiOPC™ VES Applications

Hydraulic Fluid Analysis:
The QualiOPC™ VES Oil Particle Counter is well-suited for hydraulic fluid contamination assessment, enabling maintenance teams to identify wear-generated particles and monitor fluid cleanliness levels that can impact system performance and reliability.

Lubrication and Gear Oil Monitoring:
This system supports lubricating oil and gear oil analysis for continuous particulate contamination tracking. It helps evaluate oil condition over time, supports maintenance scheduling, and reduces the likelihood of mechanical wear in critical equipment.

Transformer and Power Equipment Oil Testing:
Designed to analyze transformer insulating oil and other dielectric fluids, the instrument supports cleanliness evaluation in electrical and power systems where particle contamination can affect insulation performance and operational safety.

Aviation Fuel and Kerosene Quality Control:
The QualiOPC™ VES enables particle contamination testing in aviation fuel and kerosene quality-control processes, supporting consistent fuel cleanliness verification across handling and storage stages.

Organic Liquids and Polymer Solutions:
This system extends its analytical capability to organic liquids and polymer solutions, making it suitable for laboratories working with a broad range of industrial fluids beyond conventional oil applications.

Standards

NAS 1638:
A legacy classification standard used to define particulate contamination levels in hydraulic fluids based on particle count ranges.

SAE AS4059F:
An SAE cleanliness classification standard that evaluates fluid contamination levels by categorizing particle size distribution and counts.

ISO 4402:
An earlier calibration standard used for automatic particle counters in liquid contamination measurement systems.

ISO 11171:
A widely recognized calibration and verification standard for automatic particle counters used in liquid cleanliness and contamination analysis.

GOST 17216:
A Russian classification standard used to determine contamination levels in fluids based on measured particle content and distribution.

Oil Particle Counter – QualiOPC™ VES Key Features

• Utilizes the light-blocking (shading) principle for accurate liquid particle contamination analysis.

• Semiconductor laser sensor with a wide measurement range, stable signal output, low noise, and high resolution for precise detection.

• High-pressure syringe pump ensures consistent sampling performance with adjustable sampling volumes for different testing requirements.

• Dual positive and negative pressure injection system assists in sample degassing and supports fluids with varying viscosity levels.

• Built-in pressure monitoring system automatically regulates air pressure to enhance operational safety and stability.

• Integrated air purification system minimizes external contamination and reduces the risk of secondary sample pollution during testing.

• Compatible with multiple calibration curves and cleanliness classification standards, including NAS 1638, SAE AS4059F, ISO 4402, ISO 11171, and GOST 17216.

• Custom test method configuration with support for user-defined naming, grading, and workflow settings.

• Supports up to 64 simultaneous test channels for enhanced multi-parameter analysis capability.

• Real-time monitoring with automatic stop function when target particle concentration thresholds are reached.

• Optional sensor module integration for viscosity, moisture content, and temperature measurement alongside particle analysis.

• Advanced particle sizing capability supporting analysis of nearly 10,000 particle size levels with customizable settings.

• Compatible with standard sampling bottles and sampling cups for flexible laboratory use.

• 7-inch color touchscreen interface with fold-button design for simplified operation and improved usability.

• Supports manual, automatic, and semi-automatic calibration modes for flexible system setup.

• RS232 and RS485 communication ports enable seamless integration with PCs and laboratory management systems.

• Large-capacity data storage with result printing and USB export for easy data handling and reporting.

• Multi-user account system supporting over five user profiles with configurable permission levels.

• Optional PC-VES pressure sampler equipped with a miniature air compressor, fast pressurization capability, strong pressure retention, support for oils up to 400 cSt, and a transparent viewing window for sample observation.

Theory and Method

QualiOPC™ VES operates on the light-blocking principle, also referred to as the photoresist or shading-based particle counting method. In this process, particles suspended in the liquid pass through a defined sensing zone and interrupt a laser beam. These interruptions are converted into electrical signals, which are then processed to determine particle size distribution and overall contamination levels. This measurement approach is widely used in hydraulic and industrial fluid cleanliness analysis and aligns with established international particle counting practices.

To enhance measurement reliability across complex samples, the system integrates pressure and vacuum-assisted sampling technology. This combined mechanism improves the handling of high-viscosity liquids and supports efficient sample extraction. It also helps reduce microbubble interference, ensuring more stable and accurate readings during analysis. The sampling system is capable of handling oil viscosities up to 400 cSt, making it suitable for a broad range of laboratory and industrial fluid testing applications.

Oil Particle Counter - QualiOPC™ VES Technical Specification

Parameter	QualiOPC™ VES
Model	QualiOPC™ VES
Light Source	Semiconductor laser
Particle Size Range	0.8–600 μm
Calibration Range Reference	ACFTD 1–100 μm or ISO MTD 4–70 μm
Detection Channels	8–64 channels, optional
Sensitivity	0.8 μm (ISO 4402) / 3 μm (ISO 11171)
Resolution	<10%
Repeatability	RSD <2%
Sample Viscosity	≤650 cSt, heating or dilution possible
Display	7-inch color touch screen
Communications	RS232, RS485
Data Output	Printing and USB export
Calibration Modes	Manual, automatic, semi-automatic
Optional Integrated Measurements	Viscosity, moisture content, temperature

PC-VES Pressure Sampler Details

Parameter	PC-VES Sampler
Maximum Pressure	0–0.5 MPa
Voltage	100–265 VAC or 24 VDC or optional external lithium battery
Ambient Temperature	-20 to 60°C
Dimensions	290 × 190 × 270 mm
Net Weight	6.5 kg
Supported Oil Viscosity	Up to 400 cSt