PULUODY PMT-2T Copper Sulfate Liquid Particle Counter

Overview

The PULUODY PMT-2T Copper Sulfate Liquid Particle Counter is a high-precision, dual-laser optical particle counter engineered for rigorous particulate contamination monitoring in ultra-clean liquid media. It operates on the principle of light extinction and Mie scattering—leveraging two spatially separated, narrow-beam laser sources to enhance signal-to-noise ratio and minimize coincidence error across a broad dynamic range (1–450 µm). Unlike single-sensor systems, the 8th-generation dual-laser architecture enables simultaneous detection of both low-concentration coarse particles and trace-level submicron contaminants—critical for copper sulfate electrolyte solutions used in electroplating, semiconductor wafer cleaning, and photovoltaic manufacturing. The instrument is purpose-built for integration into closed-loop process lines or deployment as a benchtop analytical tool, supporting continuous, real-time measurement without sample dilution or filtration artifacts.

Key Features

• 8th-generation dual-laser narrow-beam optical sensor with independent wavelength alignment and thermal drift compensation
• Dual-mode flow control: precision metering piston pump (volumetric accuracy <±1%) coupled with electromagnetic flow regulation for stable, pulse-free delivery
• Configurable detection thresholds: user-defined sizing channels from 0.1 µm(c) to 450 µm, including industry-specific ranges (e.g., 4–70 µm(c) per SEMI F57 for wafer rinse water)
• Integrated touchscreen interface (7-inch color LCD) with optional wireless keyboard/mouse support for offline analysis and calibration verification
• Analog 4–20 mA output with programmable alarm thresholds and dry-contact relay for process interlock signaling
• V8.3 Analysis & Calibration Software Suite (PC Edition): separates metrological calibration routines from routine testing workflows to eliminate software-induced bias

Sample Compatibility & Compliance

The PMT-2T is validated for use with aggressive aqueous solutions—including copper sulfate electrolytes (up to 250 g/L CuSO₄·5H₂O), acidic/alkaline cleaning agents (pH 1–13), deionized water (resistivity ≥18.2 MΩ·cm), and polymer-containing etchants. Wetted materials include chemically resistant sapphire flow cells, PEEK tubing, and EPDM-free fluidic paths to prevent leaching or swelling. The system complies with ISO 21501-4 for light-scattering particle counters and meets metrological traceability requirements under JJG 1061 (China National Metrology Verification Regulation). When operated with V8.3 PC Edition and enabled audit trail functionality, it satisfies data integrity prerequisites for FDA 21 CFR Part 11 and EU Annex 11 in regulated pharmaceutical and medical device manufacturing environments.

Software & Data Management

The V8.3 software platform provides dual operational modes: embedded firmware for standalone operation and full-featured PC Edition for advanced statistical analysis, method validation, and electronic record archiving. Calibration data—including reference sphere assignments, gain settings, and flow-rate verification logs—is cryptographically signed and stored separately from test results. All measurement sessions generate timestamped, operator-annotated reports compliant with ISO 4406 (fluid cleanliness) and NAS 1638 (aerospace hydraulic fluids). Export formats include CSV, PDF, and XML for LIMS integration. Audit trails capture user login/logout events, parameter modifications, calibration actions, and report generation—retained for ≥36 months per internal SOPs.

Applications

• Semiconductor front-end: real-time monitoring of copper sulfate plating baths and post-etch rinse water for >0.5 µm defect precursors
• Flat-panel display manufacturing: quantification of abrasive particles in ITO etchant solutions prior to coating processes
• Photovoltaic cell production: verification of slurry purity in anti-reflective coating formulations
• Pharmaceutical water systems: non-viable particle surveillance in WFI and PW loops per USP
• Nanofiltration validation: challenge testing of membrane integrity using polystyrene latex standards
• Electrochemical research labs: kinetic studies of particle agglomeration in metal salt solutions under controlled pH/temperature

FAQ

What calibration standards are supported?
The PMT-2T accepts NIST-traceable polystyrene latex (PSL) spheres per ISO 21501-4, as well as certified reference materials aligned with JJG 1061. Custom calibration curves for copper sulfate matrices can be generated using in-house reference suspensions.
Can the instrument measure particles in viscous organic solvents?
It is optimized for low-viscosity aqueous systems (≤5 cP). For solvents exceeding 10 cP (e.g., glycol-based electrolytes), optional high-torque pump modules and heated flow cells are available upon request.
Is remote diagnostics supported?
Yes—Ethernet connectivity enables secure remote firmware updates, configuration backup, and diagnostic log retrieval via TLS-encrypted SSH sessions.
How is coincidence error managed at high concentrations?
The dual-laser geometry combined with real-time pulse-height discrimination reduces coincidence effects to ≤2.5% at 1000 particles/mL. For higher loadings, automated dilution protocols are integrated into the V8.3 workflow.
Does the system meet cleanroom classification requirements?
When installed with Class 100-compatible enclosures and HEPA-filtered purge air, the PMT-2T supports ISO 14644-1 Class 5 (Class 100) environments during offline sampling operations.