Oil Particle Counter - QualiOPC™ VES

Oil Particle Counter - QualiOPC™ VES

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Oil Particle Counter - QualiOPC™ VES
  • Oil Particle Counter - QualiOPC™ VES
Oil Particle Counter - QualiOPC™ VES
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Oil Particle Counter - QualiOPC™ VES

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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

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:
Purchaser acknowledges that when placing an order on the Qualitest:

A. the placing of the order signifies the purchaser's assent to place said order at the Qualitest and that the order will be accepted by the successful processing of the order by Qualitest USA LC.
B. the purchaser typing their name when requested to do so by the Qualitest constitutes a signature to contract
C. the purchaser has the full authority to enter into the contract for such entity, and such grant of authority was indicated by purchaser by placement of the order through the Qualitest.
D. A minimum handling fee will be applied to the shipping total for all orders.

Shipping within the U.S.A.:

All orders will be shipped best way prepaid, via courier for smaller packages or via Freight forwarders for larger crates. A handling fee may be applicable to orders. 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.

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.

Partial shipment: Qualitest USA reserves the right to make partial shipments unless otherwise instructed by the purchaser.

Payment terms: All payments to Qualitest USA are to be made in U.S. Dollars (USD)

A. Credit Card - Qualitest USA will accept Visa, Master Card, AMEX or Discover. Required information from the purchaser is the credit card number, 3 digit security code, expiration date, card holder's name (exactly as it appears on the card), billing address, and valid telephone number for us to use in case of difficulty. Qualitest USA reserves the right to delay shipment pending verification of credit card validity.
B. Wire Transfer - Transfer must be made to Qualitest and confirmed for the full purchase amount (merchandise, handling and shipping) prior to shipment. Please contact us by phone at 1.877.884.TEST (8378)(outside U.S. +1.905.944.9825) or by fax at +1.954.697.8211 for bank information.
C. Open Account - Available to U.S.A. and Canadian customers only. Terms on open accounts are Net 30 days from date of shipment. Qualitest USA reserves the right to refuse shipment of new orders if any unpaid invoices are older than 30 days. Purchasers may apply for an open account by providing:

their bank information
3 credit references from other suppliers
Please allow 5 business days for confirmation of credit and creation of an open account.

Return Policy:

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

  • There may be an additional restocking fee charged to the transaction if items are already shipped to customer.
  • Goods must be returned to Qualitest USA within 5 days of the date of the receipt of the purchased goods.
  • All freight, duties, customs, and other related shipping charges for the returned merchandise are borne by the purchaser. Shipments made freight collect will be refused.
  • Merchandise must be returned properly packaged in brand new, salable condition, along with original packaging and all documentation, accessories and certificates.
  • Purchaser has confirmed return authorization directly with Qualitest.
  • Merchandise is regular catalog item. Special order items can not be returned.
  • All returned merchandise is subject to inspection by Qualitest. Qualitest reserves the right to refuse return of any merchandise that is used, damaged, or not part of the current published price list. In the case Qualitest does not accept the returned merchandise, reasonable attempts will be made to notify the Buyer and the merchandise will be returned to Buyer as they were received by Qualitest. Damaged merchandise that can be restored to original condition and thus accepted for return will be evaluated on an individual basis. The purchaser will be advised of additional expenses for the repair and restoration of the returned item. After approval, these expenses will be charged to the purchaser in addition to the restocking fee.


Change of Terms:

The acceptance of any order by Qualitest USA is subject to purchaser's assent to all of the terms and conditions set forth herein. Purchaser's assent to these terms and conditions shall be presumed from the purchaser's placement of an order through the Qualitest. Any and all other terms and conditions are expressly rejected, and no addition or modification of terms and conditions shall be binding without the prior agreement of Qualitest USA in writing.

Complete Agreement:

The terms and conditions in the Qualitest web site, incorporated herein by reference, including forms, acknowledgements, quotations, invoices and sales terms and conditions constitute the entire and exclusive agreement between the purchaser and Qualitest USA LC.

Information:

Qualitest USA makes every effort to insure the accuracy of the product information displayed on its web sites, but makes no warranties, expressed or implied, as to the accuracy of the data portrayed on the web sites. Qualitest USA reserves the right to change product information, including pricing information at any time without notice. 

Trademarks and Copyrights:

The WorldofTest.com Qualitest contains trademarked product names. Product names are not to be reproduced or used in any fashion by any party other than Qualitest without the express written consent of Qualitest International Inc.. All pictures, descriptions, and other content of this web site are copyrighted by Qualitest USA and may not be used without the express written permission of Qualitest USA. Purchaser acknowledges that they have no right, title, or interest in the trademarks or copyrights in the products, and purchaser covenants that it will take no action to register or otherwise interfere with such rights. Please contact us with any requests for permission or questions about our trademarks. 

Warranty Disclaimer:

No warranty or affirmation of fact, express or implied, other than expressly set forth herein is made or authorized by Qualitest USA. Qualitest USA disclaims any and all liability for product defect claims. Qualitest USA does not express or imply a warranty that any product on the web site(s) is fit for a particular purpose. Qualitest USA honors the product warranty as published and made available by Qualitest USA. Warranty claims for products not manufactured by Qualitest are the responsibility of the manufacturer. Qualitest USA will always make its best good faith effort to resolve warranty claims. 


Force Majeure:

Qualitest USA shall not be liable for any delay in or impairment of performance resulting in whole or in part from Acts of God, service interruptions, labor disruptions, insurrections, governmental decrees or controls, war risks, severe weather, supplies or raw materials, inability to procure or ship products, inability to obtain permits and/or licenses, or any other circumstances or causes beyond the control of Qualitest USA in the conduct of its business. 

Qualitest USA Privacy Policy 

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. 

2. Personal data

Person-related data (personal data) is only used if the newsletter is ordered (by email), product(s) is (are) ordered, or to supply product information. We undertake to use the personal data entrusted to us only for the purposes stated. Purchase history is retained for assistance with future customer needs. 

II. What security measures are used to protect personal data? What are the user's options for processing personal data? 

3. Technical measures

Databases are optimally protected against third party access, loss, misuse and falsification through the use of appropriate technical means. In order to determine the popularity of individual topic areas, cookies are used in those sections. These text files are stored on your hard disk and facilitate your use of our Internet site. Thanks to these cookies, there is no need for specific registration each time you visit a section requiring registration, and we can supply you with the personalized contents you request. 

It is for you to decide whether you want to work with cookies and, if so, which kind (permanently stored on the hard disk or only placed for the time of the browser activity). However, we draw your attention to the fact that access to fields requiring registration is only possible with activated cookies. 

III. What data is communicated to third parties and for what purposes? 

4. Communication of personal data

Personal data entrusted to us by you is not communicated, leased or sold to third parties. 

IV. Which department answers questions about the processing of personal data? 

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.

Disclaimer of liability Qualitest USA shall not be liable for direct, indirect or consequential losses resulting from or in connection with access to, use of or queries to the Qualitest web site or its links with other web sites, even if Qualitest USA has previously been informed of the possibility of such losses. No guarantee is provided as to the accuracy of the information disseminated via the Qualitest USA web site. In addition, Qualitest USA guarantees neither the reliability nor the completeness of the information contained on its web site. The information made available on the Qualitest and WorldofTest.com web site may be amended at any time without prior notice. In particular, Qualitest USA shall not be liable for losses caused by transmission errors, technical faults and interruptions, breakdowns or an unlawful interference with the user's data processing system or the generally accessible systems and transmission networks. Nor shall Qualitest USA be liable for losses resulting from breakdowns, interruptions or overloads occurring to any data processing systems. If certain links are activated on the Qualitest and WorldofTest.com web site, the user may under certain circumstances leave the Qualitest web site. Qualitest USA assumes no responsibility for the contents, products or services offered or other information or offers contained on these linked web sites. 

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