Portable Liquid and Oil Particle Counter

Portable Liquid and Oil Particle Counter

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Portable Liquid and Oil Particle Counter
  • Portable Liquid and Oil Particle Counter
Portable Liquid and Oil Particle Counter
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Portable Liquid and Oil Particle Counter

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Portable Liquid and Oil Particle Counter – QualiOPC™ 400H

Reliable oil cleanliness monitoring is critical when contamination data must be captured quickly, accurately, and outside traditional laboratory environments. The QualiOPCâ„¢ 400H is a portable oil particle counter engineered for both offline and online particle contamination analysis in oils and liquids using an optical light-blocking detection principle.

It is designed for a wide range of fluids, including hydraulic oil, lubricating oil, transformer insulating oil, turbine oil, gear oil, engine oil, aviation kerosene, water-based hydraulic fluids, organic liquids, and polymer solutions.

Built for both field and laboratory environments, this portable system integrates a semiconductor laser, 32 configurable detection channels, onboard data processing, and battery-powered operation within a rugged carry-case design. It is well-suited for demanding applications in military, aerospace, power generation, and transportation sectors, where fluid cleanliness monitoring directly supports maintenance planning and equipment reliability.

The QualiOPCâ„¢ 400H delivers precise measurement of suspended particle size and concentration in service fluids, enabling users to assess contamination levels, detect irregular particle presence, and support preventive maintenance strategies. Its dual-mode capability allows both offline sampling and online measurement, making it ideal for spot inspections, maintenance validation, and routine quality control workflows.

Engineered around the optical light-blocking method, the system features a high-stability semiconductor laser and a sensitive particle counting sensor. It also includes an industrial control platform, multiple calibration curve options, integrated data output functions, and a portable housing designed for easy transport and on-site operation. Built-in lithium battery support and optional accessories further enhance usability for higher-pressure and high-viscosity applications.

Portable Liquid and Oil Particle Counter – QualiOPC™ 400H Applications

Portable Liquid and Oil Particle Counter

The QualiOPCâ„¢ 400H supports a wide range of contamination monitoring needs across industrial and field environments, delivering accurate particle analysis for multiple fluid types and operating conditions.

Hydraulic and Lubricating Oil Monitoring:
The QualiOPCâ„¢ 400H is suitable for particle contamination analysis in hydraulic oil, lubricating oil, turbine oil, gear oil, and engine oil. It helps maintenance teams track fluid cleanliness, identify abnormal wear-related debris, and optimize service schedules based on real contamination trends.

Transformer and Insulating Oil Analysis:
This system is well-suited for portable contamination checks in insulating oils used within electrical power infrastructure. It supports routine diagnostics in transformers and related systems where fluid purity is essential for operational stability and asset protection.

Aerospace, Military, and Transportation Applications:
Typical use cases include contamination assessment of aviation hydraulic fluids, turbine oils, fuels, and lubricants used in mobile and heavy-duty equipment. These environments require strict particle control to maintain reliability, safety, and consistent performance.

Water-Containing Oil Monitoring:
The QualiOPCâ„¢ 400H also provides water-content measurement capability within a range of 10 ppm to 500 ppm. This adds value for users who require both portable particle counting and basic moisture evaluation in oil samples, supporting more complete fluid condition assessment.

Standards

The QualiOPCâ„¢ 400H aligns with widely recognized international and industry standards for particle contamination measurement and fluid cleanliness classification, supporting consistent and comparable results across applications.

  • ISO 4402 – Reference standard for hydraulic fluid particle counting and calibration procedures

  • ISO 11171 – Calibration and verification framework for automatic particle counting systems

  • ISO 4406 – Fluid cleanliness coding system for hydraulic and lubricating oil applications

  • NAS 1638 – Contamination classification standard widely used in aerospace and precision hydraulic systems

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

  • ROCT 17216 – Standard for contamination level classification in technical fluids

  • JTS-005 – Industrial reference standard for fluid cleanliness evaluation

  • SAE 749D – Specification related to particulate contamination assessment in hydraulic systems

  • AETF1A – Aerospace engineering task force reference for fluid cleanliness evaluation

Portable Liquid and Oil Particle Counter – QualiOPC™ 400H Key Features

  • Utilizes the optical light-blocking detection principle for accurate measurement of particle size and concentration in oils and liquids.

  • Supports both offline sampling and online monitoring, enabling flexible use in field inspections and in-line contamination tracking.

  • Suitable for a broad range of fluids, including hydraulic oil, lubricating oil, transformer oil, turbine oil, gear oil, engine oil, aviation kerosene, water-based hydraulic fluids, organic liquids, and polymer solutions.

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

  • Offers 32 detection channels with user-configurable particle size settings, allowing detailed and adaptable size distribution analysis.

  • Supports multiple calibration curves, including ACFTD, ISOMTD, latex sphere, and GOST-based calibration methods.

  • Integrated with an industrial Windows-based control system for instrument operation, calculation processing, and data management.

  • Provides multiple data handling options, including built-in printing, software-based database storage, USB export, and computer connectivity.

  • Portable enclosure with reinforced structural design for convenient transport and field deployment.

  • Optional accessories enable high-pressure online measurement, high-viscosity sample handling, and sample degassing workflows.

  • Powered by a built-in lithium battery for extended portable operation.

  • Includes oil water-content measurement functionality with a measuring range of 10 ppm to 500 ppm, expanding its fluid condition assessment capability.

Theory and Method

The QualiOPCâ„¢ 400H operates on the optical light-blocking technique, also known as the shading or photoresist method. In this process, particles suspended in a fluid pass through a laser-illuminated sensing zone and partially obstruct the light beam. These signal variations are then processed to determine both particle size distribution and particle concentration.

This measurement approach is widely adopted in liquid contamination analysis because it enables direct detection of solid particles within oils and related fluids, providing reliable data for fluid cleanliness evaluation.

The system supports both offline bottle sampling and online measurement configurations. For online operation, it typically functions within a pressure range of 0.1 to 0.6 MPa. An optional pressure-reducing device allows measurement under higher-pressure conditions of up to 40 MPa.

Additional optional configurations include pressure and vacuum sample chambers designed for high-viscosity fluids, along with sample degassing support to improve measurement stability and accuracy in challenging fluid conditions.

Portable Liquid and Oil Particle Counter - QualiOPCâ„¢ 400H Technical Specification

Parameter QualiOPCâ„¢ 400H
Product Name Portable Liquid and Oil Particle Counter
Model QualiOPCâ„¢ 400H
Detection Principle Optical light-blocking / shading method
Light Source Semiconductor laser
Detection Mode Offline or online
Online Viscosity Range < 100 cSt, optional positive-pressure sampler for higher viscosities
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 μm to 500 μm
Sensitivity 1 μm (ISO 4402) or 4 μm(c) (ISO 11171 or equivalent reference)
Detection Channels 32 channels, configurable
Sample Volume 10–100 mL
Sample Volume Relative Error Better than ±2%
Detection Speed 5–60 mL/min, default 25 mL/min
Cleaning Speed 5–60 mL/min
Resolution Better than 10%
Coincidence Error Limit 12,000–40,000 particles/mL
Counting Repeatability RSD < 2%
Particle Count Relative Error ±10%
Oil Water-Content Measuring Range 10 ppm–500 ppm
Water-Content Error ±5 ppm from 10–100 ppm; better than ±10% from 100–500 ppm
Operating Temperature -20°C to 60°C
Storage Temperature -30°C to 80°C
Voltage 110–240 V, 50/60 Hz
Battery Built-in lithium battery
Size 380 × 310 × 205 mm
Weight 8.6 kg

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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