Description
⚙️ Product Overview
The R928052298 is the Rexroth OPM II online particle monitor, designed for continuous monitoring of particle contamination in hydraulic fluids. It provides on-line cleanliness monitoring for hydraulic systems and helps operators identify contamination changes before they develop into more serious equipment or filtration problems.
The OPM II is specified as an online particle monitor with the type designation OPM II – 1X – M. The device is intended for integration into hydraulic monitoring arrangements and can be used to support condition-based maintenance and hydraulic fluid cleanliness management.

🔧 Key Features
- Rexroth OPM II online particle monitoring technology
- Material number R928052298
- Continuous monitoring of hydraulic-fluid particle contamination
- Suitable for hydraulic system cleanliness monitoring
- Supports condition-based maintenance strategies
- Helps identify changes in fluid cleanliness
- Designed for integration with hydraulic sampling circuits
- Compatible with dedicated hydraulic connection accessories
- Suitable for industrial and mobile hydraulic applications
- Compact monitoring solution for on-line hydraulic diagnostics
📊 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | REXROTH |
| Model | R928052298 |
| Type | OPM II – 1X – M |
| Series | OPM II |
| Product Name | Online Particle Monitor |
| Application | Hydraulic Fluid Particle Monitoring |
| Monitoring Method | Online / continuous particle monitoring |
| Condition | Used |
| Country of Origin | Germany |
| Power / Dimensions / Weight | Configuration-dependent; verify nameplate |
🏭 Typical Applications
The OPM II can be applied wherever hydraulic-fluid cleanliness is important for equipment reliability and maintenance planning.
Typical applications include:
- ⚙️ Industrial hydraulic power units
- ⚙️ Mobile hydraulic equipment
- ⚙️ Hydraulic presses
- ⚙️ Injection molding machinery
- ⚙️ Steel and metal-processing equipment
- ⚙️ Marine hydraulic systems
- ⚙️ Hydraulic filtration systems
- ⚙️ Hydraulic test and laboratory systems
- ⚙️ Condition-monitoring installations
🔬 Particle Monitoring Function
Particle contamination is an important indicator of hydraulic-fluid condition. The OPM II provides online monitoring so that contamination changes can be detected without relying exclusively on periodic laboratory sampling.
When integrated into an appropriate hydraulic sampling circuit, the monitor can support:
- Fluid cleanliness assessment
- Filter-performance monitoring
- Contamination trend analysis
- Preventive maintenance
- Detection of abnormal contamination increases
- Hydraulic-system condition monitoring
The complete installation should use the correct hydraulic connections, flow conditions, and accessories specified for the OPM II configuration.
🔌 System Integration
The R928052298 is a monitoring component rather than a conventional PLC or hydraulic control valve. Its primary role is to provide particle-monitoring information to the hydraulic maintenance or monitoring system.
Before integration, verify:
- Hydraulic connection arrangement
- Sampling-line configuration
- Required flow conditions
- Auxiliary power requirements
- Electrical interface
- Communication requirements
- Installation environment
- Software or PC evaluation requirements
- Applicable accessories
The Rexroth documentation identifies dedicated accessories for hydraulic connections, including flow-control and hose components, and also identifies PC evaluation software as an accessory for the OPM II system.
🛠️ Installation & Maintenance
Installation
- Confirm the complete material number and type designation.
- Check the hydraulic sampling circuit before installation.
- Use the correct connection accessories for the application.
- Verify the required operating pressure and flow conditions.
- Confirm electrical supply and interface requirements.
- Inspect all hydraulic connections for contamination before commissioning.
- Flush or clean the sampling circuit as required.
- Commission the monitor according to the applicable operating documentation.
Maintenance
- Keep hydraulic connections clean and protected.
- Check sampling hoses and fittings for leakage.
- Monitor particle readings for abnormal changes.
- Inspect the installation for vibration or mechanical damage.
- Prevent external contamination from entering the sampling circuit.
- Compare readings with the expected cleanliness level of the hydraulic system.
- Follow the manufacturer’s service and calibration requirements.
❓ Common Questions & Answers
Q1: What is the R928052298?
It is the material number for the Rexroth OPM II online particle monitor.
Q2: What does OPM II monitor?
It monitors particle contamination in hydraulic fluid.
Q3: Is the OPM II an online monitoring device?
Yes. It is designed for online particle monitoring rather than only occasional laboratory sampling.
Q4: What is the type designation?
The documented basic-device ordering code is OPM II – 1X – M for material number R928052298.
Q5: Can it be used with hydraulic filtration systems?
Yes. Online particle monitoring can be used to evaluate hydraulic-fluid cleanliness and observe changes associated with filtration performance.
Q6: Does the monitor require hydraulic accessories?
The OPM II system has dedicated hydraulic connection accessories, including hoses, connection pieces, and flow-control components.
Q7: Can a used R928052298 be installed directly into an existing system?
The device should be checked for configuration, condition, cleanliness, hydraulic connections, electrical requirements, and functional operation before commissioning.
Q8: Is R928052298 the same as OPM II?
Yes. Rexroth documentation identifies R928052298 as the online particle monitor OPM II.
⭐ Recommended REXROTH Models
- R928052298 OPM II Online Particle Monitor
- R928052660 OPM II PC Evaluation Software
- R900025012 AB20-11/C G1/4 Hydraulic Connection
- R900981026 AB20-11/630-630BAR Hydraulic Hose
- R900083425 AB20-11/1000-630BAR Hydraulic Hose
- R900054614 AB20-11/2000-630BAR Hydraulic Hose
- R900083425 Hydraulic Sampling Hose
- R900025012 Hydraulic Connection Adapter
- R900981026 Hydraulic Sampling Assembly
- R900054614 Hydraulic Monitoring Hose
📦 Spare-Parts Recommendation
For replacement of an existing OPM II installation, the R928052298 should be matched by its complete type designation and hydraulic-system configuration rather than by the model name alone. Verify the monitor, hydraulic connections, sampling circuit, electrical interface, accessories, and operating requirements before installation.
The referenced listing identifies this particular unit as Used, with insignificant signs of use and no major dents or damage; accessories are not included according to the listing information.
