PULUODY PMT-2-11 Electronic-Grade Liquid Particle Counter
| Brand | PULUODY |
|---|---|
| Origin | Shaanxi, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | PMT-2-11 |
| Instrument Type | Optical Liquid Particle Counter |
| Detection Principle | Dual-Laser Narrow-Beam Light Scattering |
| Sensor Generation | 8th-Generation Dual-Laser Optical Sensor |
| Flow Control | Precision Piston Pump + Ultra-Precise Electromagnetic Flow Control System |
| Detection Range | 0.1–0.5 µm, 0.2–2.0 µm (standard) |
| Customizable | 1–100 µm or 4–70 µm(c), down to 0.1 µm(c) |
| Sampling Accuracy | < ±1% |
| Measurement Accuracy | < ±5% (typical) |
| Coincidence Limit | 10,000 particles/mL (5% coincidence error) |
| Output Interface | 4–20 mA analog output |
| Alarm Function | Threshold-based particle count alarm (customizable) |
| Reporting | Particles per mL & ISO 4406 / NAS 1638 contamination等级 |
| Calibration Standards | JJG 1061, NIST-traceable latex spheres, ISO 21501-2 compliant |
| Software | PULUODY V8.3 Integrated Analysis & Calibration Software (PC & touchscreen versions) |
| Display | Color LCD touchscreen + optional wireless keyboard/mouse |
| Power Input | 100–265 VAC, 50–60 Hz |
| Application Scope | Ultrapure water (UPW), semiconductor process chemicals, electronic cleaning agents, silicon wafers, flat-panel display substrates, optical lenses, nanofiltration membranes, microfiltration systems, polymer solutions, and insoluble particulate analysis in organic solvents |
Overview
The PULUODY PMT-2-11 Electronic-Grade Liquid Particle Counter is an ISO 21501-2 compliant optical particle counter engineered for ultra-high-sensitivity monitoring of submicron particulate contamination in critical liquid process streams. It employs an 8th-generation dual-laser narrow-beam scattering sensor architecture—originally developed by PULUODY Analytical Testing Group (UK)—to resolve particles as small as 0.1 µm(c) with high signal-to-noise ratio and minimal optical interference. Unlike conventional single-wavelength counters, the dual-laser configuration enables simultaneous differential scattering detection, improving discrimination between refractive index variations and true size-based events. This principle is essential for reliable quantification in low-conductivity, low-absorbance media such as ultrapure water (UPW), photoresist solvents, and high-purity etchants used in semiconductor front-end fabrication. The instrument supports both online continuous monitoring and offline laboratory-grade analysis, meeting the stringent repeatability and traceability requirements of ISO/IEC 17025-accredited laboratories and GMP-compliant cleanroom environments.
Key Features
- Dual-laser narrow-beam optical sensor with real-time pulse-height discrimination for enhanced resolution at 0.1 µm(c)
- Precision piston pump coupled with electromagnetic flow control ensures volumetric accuracy better than ±1% across variable viscosity ranges (0.5–5 cP)
- Modular hardware design enabling field-upgradable detection thresholds—from standard 0.2–2.0 µm channels to custom 4–70 µm(c) or 1–100 µm configurations
- Integrated analog 4–20 mA output with programmable alarm thresholds for PLC or SCADA integration in fab-line process control loops
- Touchscreen HMI with embedded V8.3 firmware supporting ASTM F329, ISO 4406, and NAS 1638 reporting formats—including automatic contamination code generation per sampling volume
- Calibration traceable to NIST-certified latex standards and compliant with JJG 1061 (China National Metrology Verification Regulation) and ISO 21501-2 Annex B
Sample Compatibility & Compliance
The PMT-2-11 is validated for use with deionized water, UPW (≥18.2 MΩ·cm), hydrogen peroxide solutions, ammonium hydroxide, sulfuric acid, isopropyl alcohol, propylene glycol methyl ether acetate (PGMEA), and other low-particulate organic and aqueous process fluids. Its wetted path is constructed from chemically inert sapphire, fused silica, and PFA—ensuring zero leachables and compatibility with Class 10 cleanroom protocols. The system meets ISO 14644-1 Class 5 environmental operation requirements when installed in controlled enclosures. For regulatory compliance, raw data logs include full audit trails (user ID, timestamp, calibration status, sample ID), satisfying FDA 21 CFR Part 11 electronic record requirements when paired with validated networked software deployment. It is routinely deployed in facilities certified to IATF 16949, ISO 9001, and SEMI F57-0301 standards for microcontamination control.
Software & Data Management
PULUODY V8.3 software provides dual-mode operation: standalone PC-based analysis and embedded touchscreen control. The platform separates calibration management from routine testing workflows—preventing accidental parameter overrides during production runs. All measurement sessions generate .csv and .pdf reports with embedded metadata (flow rate, temperature, pressure, sensor gain, background noise baseline). Raw scatter pulse data is stored in HDF5 format for post-acquisition reprocessing using third-party tools (e.g., MATLAB, Python Pandas). Remote diagnostics via Ethernet enable secure firmware updates and configuration backups without physical access. Optional cloud synchronization supports centralized fleet monitoring across multiple fab nodes, with role-based access control aligned with ISO/IEC 27001 information security frameworks.
Applications
- Semiconductor manufacturing: Real-time UPW loop monitoring upstream of photolithography tools and chemical mechanical planarization (CMP) slurries
- Flat-panel display production: In-line verification of cleaning agent purity prior to ITO sputtering and color filter coating
- Pharmaceutical water systems: USP and EP 2.9.19-compliant insoluble particle testing in purified water and water-for-injection (WFI)
- Nanofiltration validation: Challenge testing of membrane integrity using monodisperse latex standards
- Advanced packaging: Particulate screening of underfill epoxies and die-attach adhesives prior to dispensing
- Research & development: Quantitative characterization of nanoparticle dispersion stability in colloidal suspensions and polymer nanocomposites
FAQ
What calibration standards are supported?
The PMT-2-11 accepts NIST-traceable polystyrene latex (PSL) spheres per ISO 21501-2, as well as calibration per Chinese national regulation JJG 1061. Certified reference materials from Thermo Fisher, Duke Scientific, and Microtrac are fully compatible.
Can the instrument be integrated into a factory automation system?
Yes—via isolated 4–20 mA analog output, Modbus TCP/IP (optional), and digital relay outputs for pass/fail alarms. Full OPC UA support is available through the V8.3 Enterprise Edition.
Is the fluidic path suitable for aggressive solvents like HF or piranha solution?
No. While PFA and sapphire provide broad chemical resistance, exposure to concentrated hydrofluoric acid or hot piranha mixtures requires custom wetted material consultation and is outside standard warranty coverage.
How is coincidence error managed at high particle concentrations?
The system applies real-time coincidence correction algorithms based on pulse width and amplitude distribution, validated up to 10,000 particles/mL with ≤5% error—per ISO 21501-2 Clause 7.4.
Does the device meet FDA requirements for pharmaceutical water testing?
When operated under validated conditions—including documented calibration, environmental monitoring, and electronic signature-enabled software—it satisfies data integrity expectations of FDA Guidance for Industry: Process Validation and 21 CFR Part 11 for electronic records and signatures.
