PULUODY PMT-2-1 Portable Optical Particle Counter
| Brand | PULUODY |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Authorized Distributor |
| Instrument Type | Optical Particle Counter |
| Detection Principle | Light Obscuration (LO) / Seventh-Generation Dual-Laser Narrow-Beam Technology |
| Calibration Standards | ISO 11171, ISO 4402, GB/T 18854 |
| Measurement Range | 2–100 µm or 4–70 µm(c) |
| Channel Count | 1000 adjustable size channels (up to 16 user-defined bins) |
| Accuracy | <3% typical |
| Sample Flow Rate | 10–60 mL/min |
| Cleaning Flow Rate | 20–150 mL/min |
| Operating Pressure (Online) | 0–50 MPa (with pressure regulator) |
| Viscosity Range | Offline ≤99 mm²/s |
| Temperature Range | Fluid 0–80°C |
| Data Storage | ≥20,000 test records (expandable via USB drive) |
| Compliance | ISO 4406, NAS 1638, SAE AS4059D, GB/T 14039, DL/T 432, GJB 420B, MIL-STD-1246C |
Overview
The PULUODY PMT-2-1 Portable Optical Particle Counter is an engineered solution for real-time, in-situ, and offline particulate contamination analysis of hydraulic fluids, lubricants, insulating oils, turbine oils, and other industrial liquids. It operates on the internationally standardized light obscuration (LO) principle—specifically utilizing seventh-generation dual-laser narrow-beam detection technology—to quantify suspended solid particles by measuring transient reductions in light transmission as particles pass through a focused laser beam. This method delivers high reproducibility and traceable results aligned with ISO 11500 and DL/T 432. Designed for field-deployable reliability and laboratory-grade precision, the PMT-2-1 supports both online pressurized loop monitoring (up to 50 MPa with integrated pressure regulation) and offline benchtop analysis using its precision metering pump and optional sampling chamber. Its architecture meets the mechanical robustness, thermal stability, and electromagnetic compatibility requirements essential for operation across aerospace hangars, power plant control rooms, marine engine rooms, and mobile maintenance units.
Key Features
- Seventh-generation dual-laser optical sensor with narrow-beam geometry for enhanced signal-to-noise ratio and reduced coincidence error at high particle concentrations
- Configurable particle sizing channels: 1000 internal resolution bins, enabling user-defined reporting across up to 16 custom size thresholds (e.g., ≥4 µm(c), ≥6 µm(c), ≥14 µm(c), ≥21 µm(c), ≥25 µm(c), ≥38 µm(c), ≥50 µm(c), ≥68 µm(c))
- Integrated industrial-grade embedded controller with 7-inch color LCD touchscreen interface—no external PC required for basic operation
- Comprehensive standard compliance engine supporting ISO 4406:1999/2017, NAS 1638 Class, SAE AS4059D, and GJB 420B grading algorithms with on-device switching
- Wide dynamic viscosity tolerance: validated for offline use up to 99 mm²/s and online inline measurement up to 500 mm²/s
- Real-time analog output (4–20 mA) with programmable alarm thresholds for integration into SCADA or PLC-based condition monitoring systems
- Traceable calibration path per ISO 11171 (MTD) and ISO 4402 (ACFTD), with documented traceability to national metrology institutes including NWMS (National Northwest Metrology Center) and DIOCS No. 116 (Defense Industry Commission Level-1 Particle Metrology Station)
Sample Compatibility & Compliance
The PMT-2-1 is validated for use with mineral-based and synthetic hydraulic oils, turbine oils, transformer oils, gear oils, engine oils, aviation fuels (Jet A-1, JP-8), water-glycol and phosphate ester fire-resistant fluids, and non-aqueous polymer solutions. It complies with global regulatory and industry-specific frameworks including ASTM D6786 (for jet fuel particulate testing), ISO 4406:2017 (fluid cleanliness coding), ISO 11171:2016 (calibration standard for liquid-borne particle counters), and MIL-STD-1246C (contamination control for space and defense systems). For pharmaceutical and semiconductor applications, it supports USP and methodology adaptation when used with filtered solvents and validated cleaning protocols. All firmware and software modules adhere to data integrity principles consistent with FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in GLP/GMP environments.
Software & Data Management
The instrument ships with P6.4 Analysis & Testing Software (Integrated Edition), providing full control, automated report generation, trend analysis, and database management. The software supports multi-user role-based access control, audit trail logging (including operator ID, timestamp, parameter changes, and result modifications), and export to CSV, PDF, and XML formats compliant with LIMS integration. Raw pulse-height data is retained for post-acquisition re-binning and retrospective analysis. Firmware updates are delivered via signed USB packages with SHA-256 hash verification. Data storage includes local device memory (≥20,000 test records), USB mass storage expansion, and optional cloud synchronization through secure TLS 1.2–encrypted endpoints.
Applications
- Condition-based maintenance of hydraulic systems in wind turbines, excavators, aircraft landing gear, and naval propulsion units
- Acceptance testing of new oil batches prior to system fill in power generation and rail traction applications
- Wear debris monitoring during component endurance testing (e.g., servo-valves, pumps, bearings) per ISO 4406 trending protocols
- Cleanliness verification of insulating oil in HV transformers per IEC 60422 and DL/T 432
- Contamination control in semiconductor fab tool lubrication circuits and vacuum pump oils
- Field validation of filtration efficiency for coalescers, depth filters, and electrostatic precipitators
- Research-grade particle shedding studies in tribology laboratories using custom fluid formulations
FAQ
What calibration standards does the PMT-2-1 support?
It supports primary calibration using ISO 11171 MTD and ISO 4402 ACFTD reference materials, with traceability documentation available from accredited national metrology institutes.
Can the instrument be used for online high-pressure monitoring?
Yes—it operates continuously at pressures up to 50 MPa when equipped with the integrated pressure-reducing valve assembly.
Is the software compliant with FDA 21 CFR Part 11?
The P6.4 software includes electronic signature capability, audit trail functionality, and secure user authentication—enabling compliance in regulated environments when configured per organizational SOPs.
Does the device meet military specifications for particle counting?
It satisfies MIL-STD-1246C Level III requirements for contamination control and is routinely deployed in defense logistics and aviation maintenance depots under GJB 420B and MIL-P-28809 protocols.
How is sample carryover minimized between tests?
The system employs programmable rinse cycles (20–150 mL/min flow rate) with configurable duration and volume, plus an integrated ultrasonic cleaning mode for the flow cell and sensor chamber.
