PULUODY OPC-EX-1 Intrinsically Safe Online Particle Counter

Overview

The PULUODY OPC-EX-1 is an intrinsically safe, IP-rated online particle counter engineered for continuous, real-time monitoring of particulate contamination in pressurized hydraulic, lubricating, and aviation fluid systems operating in hazardous environments. Built upon the foundational light obscuration (LO) principle—validated across five decades of industrial deployment—the instrument implements the 7th-generation dual-laser narrow-beam optical detection architecture licensed from PULUODY Analytical Testing Group (UK). This design ensures high reproducibility in particle sizing and counting under dynamic flow conditions, with minimal sensitivity drift across temperature and viscosity variations. Unlike laboratory-based offline analyzers, the OPC-EX-1 integrates directly into process lines without bypass loops or external pumps, enabling true in-situ measurement at flow rates from 15 to 500 mL/min and system pressures up to 31.5 MPa (with optional integrated pressure reduction module). Its intrinsic safety certification (Ex ia IIC T4 Ga) permits deployment in Zone 0/1 classified areas—such as offshore drilling platforms, military vehicle hydraulic bays, aviation fuel handling facilities, and chemical cleaning solvent circulation systems—where ignition risk from electrical equipment mandates rigorous ATEX/IECEx-compliant hardware design.

Key Features

• Intrinsically safe construction compliant with IEC 60079-0, IEC 60079-11, and GB 3836.1/4 (China Ex standard), certified for Zone 0 gas group IIC applications
• IP40–IP65 configurable enclosure, supporting operation in humid, dusty, and splash-prone industrial settings
• Dual-laser narrow-beam optical sensor with optimized signal-to-noise ratio for robust discrimination of particles from 1 µm to 150 µm
• Fixed-channel configuration (8 or 16 user-selectable size thresholds) aligned with ISO 11171 calibration reference materials
• Real-time analog and digital outputs: isolated 4–20 mA, 0–5 V, RS232, and RS485 Modbus RTU protocols—fully compatible with DCS, PLC, and SCADA systems
• Onboard contamination grading engine supporting simultaneous calculation and display of ISO 4406:2021, NAS 1638, GJB 420B, GOST 17216, and SAE AS4059 codes
• Integrated alarm logic with programmable threshold triggers for particle count/ml or grade-level excursions, supporting relay dry-contact output
• Wide operational envelope: −10 °C to +80 °C fluid temperature, 0–500 cSt kinematic viscosity, and zero-backpressure sampling architecture

Sample Compatibility & Compliance

The OPC-EX-1 is validated for use with mineral oils, synthetic esters, phosphate esters, aviation turbine fuels (Jet A-1, JP-5, JP-8), hydraulic fluids (MIL-PRF-83282, MIL-PRF-5606), and organic solvents used in precision cleaning (e.g., naphtha, isopropyl alcohol blends). It complies with ISO 21501-4 for light extinction particle counters and meets the optical calibration traceability requirements of ISO 11171:2019 using NIST-traceable PSL and ACFTD reference suspensions. The device supports full audit trail generation for GLP/GMP-aligned operations and accommodates FDA 21 CFR Part 11–compliant software validation packages when deployed with optional PULUODY DataMaster™ v4.2 control suite. All firmware and calibration data are stored in non-volatile memory with write-protection, satisfying integrity requirements for regulated maintenance records per MIL-STD-1246C and DL/T 432–2018.

Software & Data Management

While the OPC-EX-1 operates autonomously as a standalone field instrument, it interfaces seamlessly with PULUODY’s DataMaster™ v4.2 platform—a Windows-based application designed for long-term trend analysis, statistical process control (SPC), and predictive maintenance reporting. The software enables automatic synchronization of raw pulse data, contamination grade history, alarm logs, and calibration metadata—including date-stamped operator ID, environmental conditions, and sensor diagnostic flags. All data exports comply with ASTM E2412 and ISO 4406 annexes for archival integrity. Optional cloud connectivity (via secure MQTT over TLS 1.2) allows integration into enterprise CMMS platforms such as IBM Maximo or SAP PM, supporting automated work order generation upon exceedance events. Firmware updates are delivered via signed binary packages with SHA-256 hash verification to ensure supply chain authenticity.

Applications

• Continuous wear debris monitoring in military ground vehicle hydraulic systems (e.g., MBT transmission oil circuits)
• Real-time cleanliness verification of aviation fuel prior to aircraft refueling (per ASTM D2276 and DEF STAN 91-91)
• Filter performance evaluation on test benches per ISO 16889 and ISO 4572
• Condition-based maintenance of offshore platform hydraulic power units exposed to salt-laden ambient air
• Contamination control during semiconductor-grade solvent recirculation in class-100 cleanrooms
• Preventive diagnostics for CNC machine tool hydraulic systems subject to thermal cycling and micro-pitting
• Third-party accredited calibration services per JJG 1052–2019 (China National Metrology Verification Regulation)

FAQ

Is the OPC-EX-1 certified for Zone 0 installation?
Yes—it carries Ex ia IIC T4 Ga certification per IEC 60079-11, permitting use in continuously explosive gas atmospheres.
Can the instrument be calibrated onsite by end users?
Yes—field calibration is supported using NIST-traceable PSL suspensions and certified reference standards; annual third-party verification is recommended per ISO/IEC 17025.
Does it support both ISO 4406 and NAS 1638 reporting simultaneously?
Yes—dual-grading is performed in real time with no latency or post-processing delay.
What is the maximum allowable system pressure without external pressure reduction?
1.0 MPa (145 psi); for higher-pressure applications, the integrated pressure-reducing module extends operational range to 31.5 MPa.
Is raw pulse data accessible for advanced statistical analysis?
Yes—RS485 Modbus registers expose unprocessed amplitude histograms and timestamped event streams for custom SPC modeling.