PULUODY PMT-2 Offline Electronic Chemicals Liquid Particle Counter with NMP Solvent Compatibility

Overview

The PULUODY PMT-2 Offline Electronic Chemicals Liquid Particle Counter is an engineered optical particle counter designed for high-sensitivity contamination monitoring in ultra-pure and specialty process liquids used across semiconductor fabrication, flat-panel display manufacturing, and advanced electronics assembly. It operates on the principle of dual-laser narrow-beam light scattering—leveraging two spatially separated laser sources with collimated beam geometry to enhance signal-to-noise ratio and minimize Mie scattering artifacts in low-conductivity, low-refractive-index media such as N-methyl-2-pyrrolidone (NMP), photoresist solvents, deionized water, and aqueous cleaning formulations. Unlike conventional single-beam systems, the eighth-generation dual-laser architecture enables simultaneous differential detection, improving resolution for submicron particles (down to 0.1 µm) while suppressing false counts from air bubbles, dissolved gas nucleation, or refractive index fluctuations. The instrument is purpose-built for offline laboratory analysis but retains full compatibility with inline sampling manifolds via its precision metering piston pump and electromagnetic flow control system—enabling traceable, repeatable volume delivery per ISO 21501-4 Annex B.

Key Features

• Dual-laser narrow-beam optical sensing platform optimized for low-viscosity, low-absorption electronic chemicals—including NMP, PGMEA, DMSO, and ultrapure water
• Precision volumetric sampling via calibrated piston pump with electromagnetic flow regulation (accuracy < ±1%, repeatability ≤0.5%)
• Configurable detection thresholds: factory-default 0.1–1.0 µm range; optional user-defined windows (e.g., 4–70 µm(c) per ISO 4406 or 1–100 µm for polymer solution insoluble particulate)
• Embedded V8.3 analysis software with dual-mode operation: standalone touchscreen interface (10.1″ color LCD) and PC-hosted application supporting ASTM E2457-compliant data export
• Integrated analog output (4–20 mA) with programmable alarm thresholds for integration into SCADA or MES systems
• Compliance-ready reporting engine generating ISO 4406:2017, NAS 1638 Class, and SAE AS4059D codes with timestamped audit logs

Sample Compatibility & Compliance

The PMT-2 accommodates a broad spectrum of non-aqueous and aqueous process fluids critical to microelectronics manufacturing. Validated matrices include semiconductor-grade solvents (NMP, acetone, IPA), photoresist diluents, CMP slurries, ultrapure rinse water (UPW), and polymer-based coating solutions. Its wetted path employs chemically inert materials—quartz flow cell, PFA tubing, and sapphire optical windows—to ensure minimal leachables and surface adsorption. Calibration adheres to national metrological verification regulation JJG 1061 (China), ISO 21501-4 (determination of particle size distribution by light scattering), and traceable PSL reference standards. The system supports GLP documentation requirements through secure user authentication, electronic signature capability, and immutable audit trail storage—fully compatible with FDA 21 CFR Part 11 compliance configurations when deployed in regulated QC environments.

Software & Data Management

PULUODY V8.3 Particle Analysis Suite provides modular functionality across three operational layers: acquisition, calibration, and reporting. Acquisition mode handles real-time particle event capture, hydrodynamic focusing validation, and coincidence correction using built-in statistical algorithms per ISO 21501-4 Clause 7.3. Calibration mode separates sensor verification from routine testing—allowing independent verification of sizing accuracy using certified PSL suspensions without interrupting production workflow. Reporting mode generates multi-format outputs (PDF, CSV, XML) compliant with internal SOPs and external regulatory submissions. iPad-compatible wireless acquisition extends mobility for lab-to-bay deployment, while encrypted local database storage ensures data integrity during offline operation. All software modules support configurable user roles, password-protected method locking, and revision-controlled method templates.

Applications

The PMT-2 serves as a primary tool for contamination control in critical fluid-handling processes. Typical use cases include: qualification of incoming electronic-grade solvents per SEMI F57 specifications; post-filtration verification of 10 nm-rated membrane filters; trending of particle shedding from wafer cleaning tools; monitoring of reclaim loop purity in photolithography bays; and validation of final rinse water quality prior to spin-coating. It is routinely deployed in R&D labs evaluating new resist formulations, QC labs certifying bulk chemical lots against IPC-J-STD-001 or JEDEC JESD22-A124 standards, and manufacturing sites implementing IATF 16949-aligned contamination management systems. Its dual-mode (portable benchtop / fixed-installation) design supports both scheduled batch testing and continuous process surveillance.

FAQ

What particle size ranges can the PMT-2 resolve in NMP-based solutions?
The instrument achieves reliable detection from 0.1 µm upward in NMP when configured with optimized optical alignment and refractive index compensation. Sub-0.2 µm resolution requires PSL calibration at equivalent RI and temperature-controlled sampling.
Does the system support automated calibration verification per ISO 21501-4?
Yes—V8.3 includes a dedicated calibration module that guides users through multi-point PSL challenge tests and auto-generates verification reports traceable to NIST-traceable reference materials.
Can the PMT-2 integrate with existing LIMS or MES platforms?
It provides native OPC UA and Modbus TCP protocols alongside 4–20 mA analog output, enabling seamless connection to industrial automation infrastructures without middleware.
Is the flow cell compatible with aggressive solvents like sulfuric acid or hydrogen peroxide mixtures?
Standard configuration uses quartz and PFA—suitable for most organic solvents and diluted oxidizers. For concentrated H₂O₂ or hot sulfuric baths, custom Hastelloy C-276 wetted parts and sapphire windows are available under OEM engineering specification.
How is data integrity maintained during extended unattended operation?
All measurements are time-stamped with hardware RTC, stored in tamper-evident SQLite database with SHA-256 hash logging, and support automatic backup to network shares or cloud endpoints via TLS 1.2 encryption.