PULUODY PMT-2-2 Optical Particle Counter for High-Purity Chemicals and Advanced Materials

Overview

The PULUODY PMT-2-2 Optical Particle Counter is an engineered solution for quantitative micro- and nanoscale particulate contamination monitoring in ultra-high-purity chemical process streams and advanced material manufacturing environments. Designed specifically for applications demanding trace-level particle detection—such as semiconductor wet processing, flat-panel display cleaning baths, silicon wafer rinse water, high-purity solvents, and pharmaceutical-grade excipient solutions—the instrument employs dual-laser narrow-beam light scattering technology to achieve high-resolution, low-noise detection of suspended solid particles in liquid media. Its measurement principle conforms to the fundamental physics of Mie scattering under controlled laminar flow conditions, enabling reliable differentiation of sub-micron contaminants (down to 0.1 µm(c)) in optically transparent or mildly turbid liquids. Unlike generic particle counters, the PMT-2-2 integrates a dual-stage fluidic architecture: a precision metering piston pump ensures volumetric repeatability, while an ultra-stable electromagnetic flow control system maintains consistent sample velocity across varying viscosities—critical for minimizing coincidence error and ensuring compliance with pharmacopoeial and industrial cleanliness standards.

Key Features

• Dual-laser narrow-beam optical sensor (8th-generation design), optimized for signal-to-noise ratio enhancement in low-concentration, high-clarity fluids
• Modular dual-mode operation: fully functional online continuous monitoring and offline portable analysis with identical metrological traceability
• Configurable detection thresholds: standard 0.5–5.0 µm channel set; optional extended ranges including 1–100 µm or 4–70 µm(c), and sub-0.2 µm(c) capability via calibration-specific alignment
• Integrated analog 4–20 mA output with programmable alarm thresholds for integration into SCADA, DCS, or PLC-based cleanroom control systems
• V8.3 firmware platform with physically segregated analysis and calibration modules—ensuring audit-ready separation of operational data handling and metrological verification per FDA 21 CFR Part 11 requirements
• Touchscreen HMI with intuitive workflow navigation, real-time histogram visualization, and on-device report generation compliant with ISO 14644-1 and IEST-STD-CC1246D cleanliness grading conventions

Sample Compatibility & Compliance

The PMT-2-2 is validated for use with deionized water, ultrapure water (UPW), aqueous cleaning agents (e.g., SC1, SC2, DHF), organic solvents (IPA, acetone, PGMEA), polymer solutions (photoresist carriers), and low-viscosity silicone oils. It meets the physical and procedural requirements of multiple international regulatory frameworks: USP and for injectables and ophthalmics; European Pharmacopoeia 2.9.19; Chinese Pharmacopoeia 2020 Edition Vol. IV; and GB 8368 for medical infusion devices. Calibration traceability follows ISO 21501-4 for liquid-borne particle counters and JJG 1061–2010 (Chinese national metrological verification regulation). All factory calibrations are performed using NIST-traceable polystyrene latex (PSL) reference materials, with documented uncertainty budgets available upon request. The system supports GLP/GMP-compliant operation through secure user authentication, electronic signature logging, and immutable audit trails embedded in the V8.3 software architecture.

Software & Data Management

PULUODY V8.3 is a dual-environment software suite comprising a real-time embedded OS for instrument control and a Windows-based desktop application for advanced post-processing, trend analysis, and regulatory reporting. The embedded interface handles sampling control, alarm management, and live particle histogram updates without external dependencies. The PC version enables batch comparison, SPC charting (X-bar/R, Cpk), multi-instrument fleet synchronization, and automated PDF/CSV report generation aligned with ISO 14644-1 Annex B and ASTM F3230–20. All data files include embedded metadata (timestamp, operator ID, calibration certificate ID, environmental conditions), supporting full 21 CFR Part 11 compliance when deployed with validated IT infrastructure. Remote diagnostics and firmware updates are supported via encrypted TLS 1.2 communication protocols.

Applications

The PMT-2-2 serves as a critical quality gate in high-precision manufacturing workflows where particle-induced defects directly impact yield and reliability. Key deployment scenarios include: real-time UPW loop monitoring in 300mm semiconductor fabs; post-rinse particle verification for TFT-LCD array substrates; end-of-line testing of MEMS packaging solvents; qualification of nano-filtration membrane integrity in biopharma buffer preparation; and routine contamination surveillance of lithium-ion battery electrolyte fill lines. In R&D laboratories, it supports formulation stability studies of colloidal dispersions, evaluation of filter efficiency across polymeric and ceramic media, and accelerated aging assessments of coating resins. Its ability to operate in both fixed-installation and mobile configurations allows seamless transition from production floor validation to cleanroom commissioning and periodic requalification per ISO 14644-2.

FAQ

What regulatory standards does the PMT-2-2 support out-of-the-box?

The instrument is pre-configured for ChP 2020, USP , EP 2.9.19, and GB 8368 methodologies, with built-in report templates matching each standard’s required output format.
Can the PMT-2-2 be integrated into an existing MES or LIMS environment?

Yes—via OPC UA or Modbus TCP protocol adapters (optional hardware module), enabling bidirectional data exchange with enterprise systems while preserving raw count data integrity.
Is sub-0.5 µm detection possible without hardware modification?

Sub-0.5 µm detection (e.g., 0.1 µm(c)) requires factory recalibration using specialized optics and PSL standards; it is offered as a qualified service option, not a field-upgradeable feature.
How is flow rate accuracy maintained during long-term unattended operation?

The dual-control architecture—mechanical piston pump + closed-loop electromagnetic flow regulator—provides active drift compensation, verified daily via automated self-check routines embedded in V8.3 firmware.
Does the system support multi-point calibration verification per ISO 21501-4 Annex D?

Yes—V8.3 includes a guided multi-point verification workflow with automatic pass/fail assessment against ISO-defined linearity, resolution, and counting efficiency criteria.