Portable Particle Counter

Portable Particle Counter

Skip to product information
Portable Particle Counter
SKU:

Portable Particle Counter

The QualiOPC™ 400 is a high-performance portable particle counter designed for flexible field and laboratory fluid analysis. Engineered for aerospace, defense, and power generation R&D, it delivers professional-grade contamination tracking across 32 configurable detection channels within a rugged, battery-powered carry-case without compromising on optical precision or global testing compliance.

  • Wide 1 To 500 Micrometer Range
  • Advanced 32 Channel Resolution
  • High 40 MPa Pressure Capacity
  • Mobile Battery Powered Frame

Get personalized pricing for your specific requirements

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

Portable Particle Counter

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.

Portable Particle Counter

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.

Portable Particle Counter

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

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.

🚚

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. 

Related Products