PULUODY PMT-2 High-Purity Chemical Liquid Particle Counter

Overview

The PULUODY PMT-2 High-Purity Chemical Liquid Particle Counter is an engineered solution for quantitative micro- and nanoscale particulate contamination analysis in ultra-clean process liquids. It operates on the principle of dual-laser narrow-beam light scattering—where two spatially separated laser sources illuminate a precisely defined sample volume, enabling high signal-to-noise ratio detection and robust discrimination of sub-micron particles in low-conductivity, low-viscosity media. Unlike conventional single-beam systems, the 8th-generation optical sensor mitigates Mie scattering artifacts and refractive index dependency through differential intensity and pulse width analysis, significantly improving sizing fidelity for polydisperse contaminants in ultrapure water, semiconductor cleaning solvents (e.g., SC-1, DHF), photoresist developers, and polymer precursor solutions. The instrument is purpose-built for both online integration into recirculating loops (via flow cell interface) and offline batch analysis in cleanroom-compatible laboratories, supporting real-time trending, alarm-triggered event logging, and compliance-driven reporting across regulated industries.

Key Features

• Dual-laser narrow-beam optical sensing architecture with independent wavelength alignment for enhanced resolution between 0.5 µm and 5.0 µm (ISO 21501-4 compliant)
• High-stability volumetric sampling via precision ceramic piston pump and closed-loop electromagnetic flow regulation (<±1% volumetric repeatability)
• Modular detection range configuration: standard 0.5–5.0 µm; optional extended channels from 0.1 µm(c) up to 100 µm(c) with user-defined thresholding
• V8.3 software platform featuring physically separated calibration and analysis modules—ensuring metrological traceability without operational interference
• Integrated touchscreen HMI with optional wireless peripheral support for glove-compatible operation in Class 100 cleanrooms
• 4–20 mA analog output with programmable alarm thresholds and relay activation for integration into DCS/SCADA systems
• Full audit trail functionality compliant with FDA 21 CFR Part 11 requirements when operated under validated software configuration

Sample Compatibility & Compliance

The PMT-2 accommodates a broad spectrum of non-aggressive, low-particulate background liquids including deionized water (UPW), hydrogen peroxide solutions, ammonium hydroxide blends, isopropyl alcohol, ethylene glycol-based coolants, and low-viscosity polymer dispersions. It is validated for use with pharmacopeial standards including USP , EP 2.9.19, and ChP 2020, and supports calibration using NIST-traceable polystyrene latex (PSL) spheres per ISO 21501-4. The system meets mechanical and electrical safety requirements per IEC 61010-1 and is designed for deployment in environments adhering to ISO 14644-1 Class 5–8 cleanroom specifications. All firmware and software versions are documented with revision-controlled release notes for GMP/GLP traceability.

Software & Data Management

PULUODY V8.3 software provides dual-mode operation: calibration mode (password-protected, read-only access to reference data) and analysis mode (user-configurable report templates, export to CSV/PDF/XML). Raw pulse data—including amplitude, duration, and coincidence flags—is retained for retrospective reprocessing. The system supports time-synchronized multi-channel acquisition when paired with optional conductivity or temperature sensors. Data integrity safeguards include electronic signatures, automatic backup to external USB storage, and configurable retention policies aligned with 21 CFR Part 11 Annex 11 expectations. Batch reports include particle concentration (particles/mL), ISO 4406:2017 code assignment, and statistical summaries (mean, SD, CV%) per measurement cycle.

Applications

• Real-time monitoring of UPW distribution loops in semiconductor fabs (SEMI F57/F63 alignment)
• Final rinse validation for silicon wafers and photomasks prior to lithography
• Quality release testing of electronic-grade solvents per SEMI C37 and ASTM D7861
• In-process control of nano-filtration membrane integrity in pharmaceutical water systems
• Stability assessment of colloidal suspensions in battery electrolyte R&D
• Contamination diagnostics in flat-panel display (FPD) cleaning baths and etch residue removal fluids

FAQ

What regulatory standards does the PMT-2 support for pharmaceutical liquid testing?
The instrument complies with USP , EP 2.9.19, ChP 2020, and JP 17, and supports calibration per JJG 1061 and ISO 21501-4 using certified PSL standards.
Can the PMT-2 be integrated into a PLC-controlled manufacturing line?
Yes—it provides isolated 4–20 mA analog output and dry-contact alarm relays compatible with industrial PLCs, along with Modbus RTU option upon request.
Is offline calibration possible without interrupting production?
Absolutely—the V8.3 software enables full calibration verification and adjustment in standalone mode using portable reference standards, with no impact on live process data streams.
How is data integrity ensured during long-term unattended operation?
The system logs all operator actions, calibration events, and measurement parameters with timestamps and user IDs; backups auto-execute hourly to redundant internal storage and external USB drives.
Does the PMT-2 require periodic recalibration by the manufacturer?
No—users may perform field calibration using certified reference materials; however, annual performance verification by an ISO/IEC 17025-accredited lab (e.g., Zhongte Metrology Institute) is recommended for GMP environments.