PULUODY PMT-2S Benchtop Copper Sulfate Liquid Particle Counter

Overview

The PULUODY PMT-2S Benchtop Copper Sulfate Liquid Particle Counter is a high-precision optical particle counter engineered for quantitative analysis of insoluble particulate contamination in low-conductivity, non-aqueous, and aggressive ionic solutions—including copper sulfate electrolytes widely used in electroplating, PCB manufacturing, and semiconductor wet processing baths. It operates on the principle of dual-laser narrow-beam light scattering, where two spatially separated laser sources illuminate the sample stream simultaneously, enabling enhanced signal-to-noise ratio, reduced false counts from refractive index fluctuations, and improved discrimination of sub-micron particles in high-salinity media. Unlike conventional single-beam counters, the 8th-generation sensor architecture mitigates Mie scattering artifacts common in metallic salt solutions, delivering robust reproducibility across varying ionic strengths (up to 1.2 S/m conductivity). Designed for both offline laboratory verification and integration into inline process monitoring loops, the PMT-2S meets the stringent requirements of semiconductor front-end fabrication, flat panel display (FPD) cleaning validation, and advanced battery electrolyte quality control.

Key Features

• Dual-laser narrow-beam detection system optimized for high-ionic-strength liquids—specifically validated for copper sulfate (CuSO₄) solutions up to 250 g/L concentration.
• Independent calibration and analysis software modules (V8.3) eliminate cross-interference between metrological verification and routine testing workflows.
• Precision metering piston pump combined with electromagnetic flow regulation ensures volumetric accuracy better than ±1% and repeatability under continuous sampling conditions.
• Configurable detection thresholds: standard range 1–450 µm; user-definable sub-ranges including 0.1 µm(c) critical size mode for nanoscale defect tracking in photomask cleaning fluids.
• Real-time analog output (4–20 mA) with programmable alarm thresholds enables direct integration with PLC-based SCADA systems for automated bath replacement triggers.
• Compliance-ready firmware architecture supporting audit trail generation, user role management, and electronic signature capture per FDA 21 CFR Part 11 guidelines when deployed in regulated environments.

Sample Compatibility & Compliance

The PMT-2S demonstrates validated performance across a broad spectrum of technically demanding fluids: copper sulfate plating baths, sulfuric acid-based etchants, dilute HF/NH₄F mixtures, ultrapure water (UPW) rinse streams, photoresist developers, and polymer-based spin-coating solvents. Its fluidic path employs chemically inert sapphire capillaries and PFA-wetted components rated for pH 0–14 and temperatures up to 50 °C. Calibration traceability adheres to national metrological standards (JJG 1061) and international particle sizing protocols (ISO 21501-4), with optional NIST-traceable latex sphere certification available. The instrument satisfies key industry validation requirements for semiconductor manufacturing (SEMI F63, SEMI F39), pharmaceutical water systems (USP , ), and aerospace hydraulic fluid cleanliness (ISO 4406, NAS 1638).

Software & Data Management

PULUODY V8.3 software provides dual-mode operation: standalone embedded interface via 7-inch color touchscreen or full-featured PC client with remote diagnostics. All measurement sessions are timestamped and logged with metadata including operator ID, calibration status, environmental temperature, and flow rate verification records. Raw pulse data is retained for retrospective reanalysis without loss of resolution. Report generation supports customizable templates compliant with ISO 4406, NAS 1638, and SAE AS4059 contamination coding standards. Audit trail functionality includes immutable records of user logins, parameter modifications, calibration events, and report exports—fully compatible with GLP and GMP documentation frameworks.

Applications

• Real-time monitoring of copper sulfate electrolyte purity in PCB through-hole plating lines to prevent micro-roughness and void formation.
• Offline verification of rinse water cleanliness after wafer cleaning steps in 300 mm fab environments.
• Validation of nano-filtration membrane integrity during production of high-purity anodizing solutions.
• Quantitative assessment of abrasive particle carryover in CMP slurry recirculation systems.
• Stability testing of conductive polymer dispersions used in flexible electronics coating processes.
• Root-cause analysis of haze defects in TFT-LCD color filter array manufacturing.

FAQ

Can the PMT-2S measure particles in concentrated CuSO₄ solutions without sensor fouling?
Yes—the optical path incorporates sapphire windows and self-cleaning flow dynamics that minimize deposition. Routine maintenance intervals exceed 200 hours in 200 g/L CuSO₄ at 25 °C.
Is ISO 21501-4 calibration included with delivery?
A full calibration certificate traceable to ISO 21501-4 and NIST SRM 1963 spheres is provided; field recalibration kits and accredited third-party services are available.
Does the instrument support ASTM D7619 for semiconductor rinse water?
While ASTM D7619 references light extinction methods, the PMT-2S meets its performance criteria for sensitivity and counting statistics when operated in 4–70 µm(c) mode with UPW-compatible fluidics.
Can data be exported to LIMS systems?
Yes—CSV, XML, and SQL-compatible database dumps are supported; OPC UA and Modbus TCP interfaces are available as optional firmware upgrades.
What is the minimum detectable particle size in copper sulfate solution?
At 0.1 µm(c) mode, the system achieves >90% counting efficiency for spherical polystyrene standards in deionized water; in 200 g/L CuSO₄, effective lower limit shifts to ~0.25 µm due to refractive index matching effects—verified per ISO 21501 Annex D.