Portable Particle Counter

Portable Particle Counter – QualiOPC™ 400

Reliable oil contamination measurement is essential when fast, precise data is required outside laboratory conditions. The Portable Oil Particle Counter QualiOPC™ 400 is developed for both field and laboratory analysis of particulate contamination in oils and industrial fluids. It uses the optical light-blocking principle to detect and measure particles in liquid samples, supporting offline testing as well as optional online sampling for continuous monitoring needs.

Designed for maintenance teams and inspection workflows, this system helps deliver practical fluid cleanliness insights in workshops, production facilities, and remote service environments. It enables users to quickly assess contamination levels and make informed maintenance decisions based on real-time results.

The QualiOPC™ 400 is built with a semiconductor laser source, a 32-channel particle detection system, and a Windows-based control interface for smooth operation and data management. A built-in lithium battery supports mobility, making it suitable for on-site testing without dependence on constant power supply.

This portable Oil Particle Counter is suitable for a wide range of industrial fluids, including hydraulic oils, lubricants, transformer oils, turbine oils, aviation fluids, and other technical liquids where contamination control directly influences equipment reliability, performance stability, and maintenance planning.

Its compact carry-case design enhances usability in field service operations, plant inspections, and mobile testing programs where fixed laboratory instruments are less practical. Combining optical detection technology, adjustable sampling control, battery-powered operation, and integrated data storage, the system enables users to generate and record results directly at the testing location with efficiency and consistency.

Portable Particle Counter – QualiOPC™ 400 Applications

Hydraulic and Lubricating Oil Monitoring:
QualiOPC™ 400 is used for contamination assessment in hydraulic and lubricating oils across industrial machinery. It supports maintenance teams in tracking fluid cleanliness, identifying abnormal wear debris, and making more informed decisions about service intervals and system upkeep.

Aerospace and Military Fluid Analysis:
Common applications include inspection of hydraulic systems, lubricants, and fuel-related fluid pathways where strict particle control is essential for operational reliability and safe system performance.

Electrical Power Industry:
The system is well-suited for transformer insulating oils and turbine lubrication systems within power generation and distribution environments. Portable particle measurement helps evaluate oil condition and supports condition-based maintenance strategies for critical infrastructure.

Transportation and Heavy Equipment:
QualiOPC™ 400 is applicable in rail, marine, automotive, and heavy-duty machinery environments. Its portable configuration enables on-site contamination checks of hydraulic and lubrication systems, supporting fast diagnostics and reducing downtime in field operations.

Standards

• ISO 4402 – Reference standard for hydraulic fluid particle counting

• ISO 11171 – Calibration and verification standard for automatic particle counters

• ISO 4406 – Fluid cleanliness coding system used for contamination level classification

• NAS 1638 – Aerospace industry standard for fluid contamination grading

• SAE AS4059E / SAE AS4059F – Aerospace cleanliness classification standards for particulate contamination control

• ROCT 17216 – Standard for classification of oil contamination levels

• JTS-005 – Technical specification for contamination measurement and control applications

• SAE 749D – Standard related to particulate contamination evaluation in fluid systems

• AETF1A – Aerospace fluid cleanliness and contamination control reference standard

Portable Particle Counter – QualiOPC™ 400 Key Features

• Operates on the optical light-blocking principle for accurate particle size detection and counting in fluids.

• Designed in a compact carry-case format for both field use and laboratory environments.

• Supports offline sampling with optional online sampling for continuous contamination monitoring.

• Equipped with a semiconductor laser and high-sensitivity particle counting sensor for stable performance.

• Features 32 detection channels with customizable particle size resolution at 0.1 μm intervals.

• Measures particulate contamination across a range of 1 μm to 500 μm.

• Includes a built-in lithium battery for mobile operation, along with AC power compatibility.

• Runs on a Windows-based industrial control system for instrument control, data processing, and analysis.

• Supports multiple calibration options, including ACFTD, ISOMTD, latex sphere, and GOST standards.

• Provides flexible data storage through onboard software, integrated printing, and USB export options.

• Adjustable sampling and cleaning flow control enables compatibility with different fluid types and testing conditions.

• Optional support for high-pressure and high-viscosity sampling extends usability across demanding applications.

• Durable enclosed housing design enhances portability and suitability for field deployment.

Theory and Method

QualiOPC™ 400 operates on the optical light-blocking principle, also known as the shading or photoresist method. In this approach, suspended particles flow through a defined sensing zone where they interrupt a laser beam. These interruptions generate signal variations that are processed by the system to determine both particle size and particle concentration. This technique is widely applied in contamination analysis of oils and industrial fluids, as it enables direct measurement of suspended solid particles within the sample.

The system is designed to support both offline bottle sampling and optional online measurement configurations. For online operation, it works within a standard pressure range of 0.1 to 0.6 MPa. With optional pressure-reducing components, it can handle higher-pressure environments of up to 40 MPa. In addition, the system can be configured for higher-viscosity fluid analysis through dedicated accessories, expanding its usability across a broader range of industrial applications.

Portable Particle Counter - QualiOPC™ 400 Technical Specification

Parameter	QualiOPC™ 400
Product Name	Portable Particle Counter
Model	QualiOPC™ 400
Detection Principle	Optical light-blocking / shading method
Light Source	Semiconductor laser
Operation Mode	Offline sampling; online sampling optional
Online Viscosity Range	<100 cSt, with optional accessory for higher viscosity
Online Pressure Range	0.1–0.6 MPa, optional up to 40 MPa with pressure-reducing device
Sample Temperature	0°C to 80°C
Particle Size Range	1–500 μm
Sensitivity	1 μm (ISO 4402) or 4 μm(c)
Detection Channels	32 channels, 0.1 μm intervals
Sampling Volume	10–100 mL
Relative Error of Sampling	Better than ±2%
Sampling Speed	5–60 mL/min, default 25 mL/min
Cleaning Speed	5–60 mL/min
Resolution	Better than 10%
Overlap / Coincidence Error Limit	12,000–40,000 particles/mL
Counting Repeatability	RSD < 2%
Counting Accuracy	±10%
Operating Temperature	-20°C to 60°C
Storage Temperature	-30°C to 80°C
Voltage	110–240 V AC
Battery	Built-in lithium battery
Optional Features	High-pressure sampling support, calibration curve packages