PULUODY PMT-2ccs Integrated Ultra-Pure Water Liquid Particle Counter

Overview

The PULUODY PMT-2ccs Integrated Ultra-Pure Water Liquid Particle Counter is an engineered solution for real-time, high-sensitivity particulate contamination monitoring in critical fluid processes. Designed specifically for ultra-pure water (UPW), semiconductor process chemicals, electronic-grade solvents, and pharmaceutical-grade liquids, the instrument employs an 8th-generation dual-laser narrow-beam optical detection principle based on Mie scattering theory. Unlike conventional single-wavelength particle counters, its coaxial dual-laser architecture enables simultaneous interrogation at two distinct scattering angles—enhancing discrimination of sub-micron particles (down to 0.05 µm) while minimizing refractive index dependency and signal noise. The system operates under laminar flow conditions established by a precision plunger pump and closed-loop electromagnetic flow regulation, ensuring volumetric sampling repeatability better than ±1% and counting accuracy within ±3% (typical). Its architecture supports both online integration into UPW distribution loops and offline portable deployment—making it suitable for GMP-compliant cleanroom validation, semiconductor fab line monitoring, and QC release testing of injectables.

Key Features

• Dual-laser narrow-beam optical sensor with independent wavelength channels for enhanced resolution of particles between 0.05 µm and 0.5 µm
• High-fidelity flow control system combining a calibrated metering plunger pump and real-time electromagnetic flow feedback
• Modular hardware design enabling seamless integration into existing UPW skids, chemical delivery systems, or cleanroom recirculation loops
• Configurable detection thresholds and user-defined size bins (e.g., 4–70 µm(c) or arbitrary 0.1 µm(c) binning)
• Integrated analog output (4–20 mA) with programmable alarm relays for SCADA/DCS interfacing and automated process intervention
• Touchscreen HMI with intuitive workflow navigation; optional wireless keyboard/mouse support for lab-based data review and method setup
• Self-diagnostic firmware with automatic zero-check, background noise logging, and sensor health reporting

Sample Compatibility & Compliance

The PMT-2ccs is validated for use with low-conductivity aqueous media (e.g., UPW with resistivity >18.2 MΩ·cm), organic solvents (IPA, acetone, PGMEA), polymer solutions, and viscous cleaning formulations. It meets regulatory requirements for particulate testing in multiple international pharmacopoeias—including USP , USP , European Pharmacopoeia 2.9.19, British Pharmacopoeia 2.9.19, and Chinese Pharmacopoeia 2015/2020 editions. Calibration traceability follows ISO 21501-4 for liquid-borne particle counters and JJG 1061 national metrological verification procedures. For GxP environments, the system supports audit trail-enabled operation when paired with compliant software configurations, and its mechanical design conforms to IP54 ingress protection for controlled ambient deployment.

Software & Data Management

The instrument ships with PULUODY V8.3 Analysis & Calibration Software Suite (PC version), which separates measurement acquisition from calibration management—a deliberate architectural choice to prevent operational interference during routine testing. Data capture includes raw pulse height histograms, time-stamped particle counts per size channel, and dynamic contamination trend overlays. Export formats include CSV, PDF reports (with embedded metadata), and XML for LIMS integration. The iPad-based acquisition module provides wireless synchronization, remote status monitoring, and offline report generation—ideal for mobile validation teams conducting multi-point UPW loop surveys. All software modules are structured to support 21 CFR Part 11 readiness through configurable user roles, electronic signatures, and immutable audit trails.

Applications

• Real-time monitoring of ultra-pure water loops in semiconductor front-end fabs (300 mm wafer processing lines)
• In-line quality assurance of photoresist developers, etchants, and CMP slurries
• Final-fill validation of sterile injectables and ophthalmic solutions per USP
• Monitoring filtration integrity across nanofiltration and ultrafiltration membranes (e.g., 20 nm–100 nm pore rating verification)
• Contamination forensics in flat-panel display manufacturing—tracking glass substrate rinse water purity
• Qualification of clean-in-place (CIP) rinse cycles in biopharmaceutical production suites
• Research-grade nanoparticle suspension characterization in academic and industrial colloid laboratories

FAQ

What particle size ranges does the PMT-2ccs support out-of-the-box?

The standard configuration covers 0.05–0.2 µm and 0.1–0.5 µm detection channels. Custom binning (e.g., 4–70 µm(c) or user-defined 0.1 µm(c)) is available via firmware configuration and sensor recalibration.
Can the system be integrated into a PLC-controlled water distribution system?

Yes—the 4–20 mA analog output and discrete alarm relay outputs are designed for direct connection to industrial PLCs and DCS platforms. Modbus RTU/TCP options are available upon request.
Is the instrument compliant with FDA 21 CFR Part 11 requirements?

While the base hardware and firmware provide foundational controls (user authentication, audit log storage), full Part 11 compliance requires implementation of validated software configurations, documented SOPs, and periodic re-verification—services supported by PULUODY’s global validation team.
How is sensor calibration verified during routine operation?

The system supports daily automated background checks and scheduled calibration using NIST-traceable latex sphere suspensions (e.g., 0.1 µm, 0.2 µm, 0.5 µm standards), with results logged in the audit trail and exportable for QA review.
Does the PMT-2ccs require degassing or temperature stabilization of samples prior to analysis?

For ultra-pure water applications, inline degassing is recommended to suppress cavitation artifacts; the instrument includes temperature compensation algorithms but performs optimally within 15–35 °C ambient and sample temperature range.