Online Particle Counter

Online Particle Counter

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Online Particle Counter
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Online Particle Counter

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Online Particle Counter – QualiOPC™ 500

The QualiOPC™ 500 Oil Particle Counter is developed for continuous contamination tracking while machinery remains in operation. It enables real-time monitoring of particulate levels in hydraulic oils, lubricants, and a wide range of industrial fluids, allowing users to evaluate fluid cleanliness without stopping system performance.

This Online Particle Counter integrates online and offline testing functions with a light-blocking detection principle and a semiconductor laser light source for stable measurement accuracy. It supports continuous automated monitoring along with configurable cleanliness standards, communication interfaces, optional water-content detection, and multiple data storage options, making it suitable for plant-wide condition monitoring and predictive maintenance programs.

Designed for hydraulic and lubrication systems, the QualiOPC™ 500 delivers real-time particle count insights to support faster response to rising contamination levels. This helps reduce unexpected equipment downtime and improves overall maintenance scheduling and reliability of critical assets.

The system supports both online and offline usage, giving laboratories and industrial environments flexibility for continuous monitoring and spot verification checks. It features a large-format high-sensitivity particle sensor, a 7-inch industrial Android-based display, adjustable calibration curves, and multiple result management options including built-in printing, USB export, and database storage for long-term analysis.

Online Particle Counter – QualiOPC™ 500 Applications

The QualiOPC™ 500 is designed for a wide range of contamination monitoring applications across industrial and laboratory environments. It is widely used for hydraulic system monitoring, lubrication system analysis, machinery condition assessment, energy and power generation equipment, manufacturing process control, and heavy equipment maintenance operations.

This Online Particle Counter is applied across multiple sectors, including aerospace, rail systems, marine engineering, power generation, mining, petroleum refining, chemical processing, ports and shipping, metallurgy, automotive manufacturing, industrial equipment production, wind energy systems, and water treatment facilities.

It is well-suited for inline monitoring of hydraulic circuits, gearboxes, turbine lubrication systems, compressors, mobile machinery, and various production fluids. Continuous cleanliness monitoring in these systems helps maintain optimal performance, extend component lifespan, and reduce the risk of contamination-related failures and unplanned downtime.

Standards Supported

The QualiOPC™ 500 Online Particle Counter supports multiple internationally recognized and industry-relevant cleanliness and calibration standards used for fluid contamination analysis.

It is compatible with ISO 4406, which defines fluid cleanliness coding based on particle concentration in hydraulic and lubrication oils. It also aligns with ISO 4402, an earlier calibration reference for automatic liquid particle counters, and ISO 11171, which provides calibration and verification procedures for particle counting instruments.

For aerospace and high-precision hydraulic applications, the system supports NAS 1638, a legacy classification system for particulate contamination, as well as SAE AS4059E and SAE AS4059F, which are widely used SAE standards for hydraulic fluid cleanliness classification in aerospace and industrial systems.

In addition, the instrument accommodates GOST 17216 (ROCT 17216), a Russian standard for fluid contamination grading, along with compatibility references such as JTS-005 and SAE 749D, which may appear in legacy systems or software for backward compatibility.

The system also includes support for specialized or less widely defined references such as AETF1A, ensuring broader usability across different monitoring setups and industry-specific configurations.

Online Particle Counter – QualiOPC™ 500 Key Features

The QualiOPC™ 500 Online Particle Counter is built for continuous contamination monitoring in hydraulic and lubrication systems, delivering reliable real-time insight into fluid cleanliness conditions.

Key features include both online and offline testing capability, allowing flexible use in laboratory and field environments. It operates on a semiconductor laser light source combined with a light-blocking particle detection principle for stable and accurate particle measurement.

The system is equipped with a high-performance large-area particle counting sensor and supports continuous automatic monitoring with adjustable sampling intervals for different operational requirements.

A 7-inch industrial-grade display with Android-based control provides an intuitive interface for calculation, configuration, and data visualization. The device includes built-in cleanliness standards with support for user-defined settings to meet specific application needs.

It supports multiple calibration options such as ACFTD, ISOMTD, latex sphere, and GOST references for enhanced measurement reliability across different standards.

For data handling, the system offers built-in printing, database storage via software, and USB export for easy record management and reporting. Communication options include RS485 and RS232 interfaces for integration with external monitoring and control systems.

An optional water-content sensor is available for extended fluid condition analysis, making the system suitable for demanding industrial environments where continuous reliability and contamination control are critical.

Theory and Method

The QualiOPC™ 500 Online Particle Counter operates using the light-blocking principle, also known as the shading method, to determine both the size and concentration of solid particles suspended in liquids. When particles pass through the optical sensing zone, they interrupt a focused laser beam, and these variations in light intensity are converted into precise particle count and fluid cleanliness data.

Designed for continuous automatic online monitoring, the system enables real-time analysis of flowing oil within active hydraulic and lubrication circuits. The measurement interval can be adjusted according to operational requirements, allowing flexible monitoring strategies across different systems.

This approach supports uninterrupted cleanliness trending in working machinery, helping users track contamination changes over time instead of relying solely on periodic laboratory sampling. As a result, it provides a more consistent view of system health and fluid condition in critical industrial applications.

Online Particle Counter - QualiOPC™ 500 Technical Specification

Parameter QualiOPC™ 500
Product Name Online Particle Counter
Model QualiOPC™ 500
Light Source Semiconductor laser
Detection Method Light-blocking / shading method
Operation Mode Online or offline
Online Monitoring Interval 1 second to 24 hours
Online Test Pressure 0.1 to 0.6 MPa, optional pressure-reducing device up to 40 MPa
Sample Temperature 0°C to 80°C
Particle Size Range 1 μm to 500 μm
Sensitivity 1 μm (ISO 4402) or 4 μm(c) (ISO 11171 reference)
Detection Channels 32 channels, particle size can be set in 0.1 μm intervals
Sampling Volume 10 to 100 mL
Sampling Volume Relative Error Better than ±3%
Detection Speed 5 to 60 mL/min, default 25 mL/min
Cleaning Speed 5 to 60 mL/min
Resolution Better than 10%
Coincidence Error Limit 12,000 to 40,000 particles/mL
Counting Repeatability RSD < 2%
Particle Count Relative Error ±10%
Communication RS485 or RS232
Display / Control 7-inch industrial display, Android system
Operating Temperature -20°C to 60°C
Storage Temperature -30°C to 80°C
Dimensions 380 × 280 × 170 mm
Weight 5.5 kg
Voltage 110 to 240 VAC or 24 VDC
Optional Feature Water-content sensor

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks. If you require these items urgently please contact us to check accurate stock availability and to organize faster shipping methods.

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Important Delivery Information

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks.

Need it urgently? Contact us here to check stock and organize faster shipping.

Orders:
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Shipping within the U.S.A.:

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Shipping outside of the U.S.A.:

All orders will be shipped best way, via courier for smaller packages or via Freight forwarders for larger crates. A low handling fee may be applicable. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims. Export fees, duties, taxes, and customs clearance are the responsibility of the purchaser.

Shipping insurance is not included, please contact our sales representatives if you need shipping insurance.

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their bank information
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Qualitest USA may accept return of purchased merchandise within North America for refund or credit under the following conditions -

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I. What legal provisions govern our data processing practices? How and from where (internal/external sources) is personal data acquired? What are the rights of the user (web site visitor/registered customer)? 

1. General
As a general principle, no personal details need to be provided when visiting our Internet site. Data made available to us by you is treated in strict confidence and in accordance with the provisions of the Federal Data Protection Act. With a few exceptions (see point 2 below), our web server only registers non-personal (anonymous) data concerning the use of our site. Specifically, the log files of our web server, as a general rule, only contain the user's IP address, the last page visited by the user, the browser used, date, time and the file requested. This anonymous data, however, does not permit conclusions to be drawn about the individual users, and merely serves to prepare statistics on the use of our Internet site for the purpose of its improvement. At the same time, great importance is placed on ensuring that usage data is not linked with personal data. 

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5. Contact

In the light of the rapid technical developments in connection with the Internet, we make every effort to constantly improve our Internet site and technical precautions, including those connected with data protection. We will keep you suitably informed about such measures. Any changes will be published here. Further information is available at any time by contacting Qualitest USA.

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