PULUODY PMT-20 Coal Powder Large Particle Counter

Overview

The PULUODY PMT-20 Coal Powder Large Particle Counter is a high-precision optical particle counter engineered for quantitative detection and size-resolved counting of suspended solid particles in liquid media—specifically optimized for coal-derived slurries, cleaning agents, ultrapure water, semiconductor process fluids, and other industrial liquids where large particulate contamination (>1 µm) poses critical risks to system integrity, filtration efficiency, or end-product quality. Utilizing eighth-generation dual-laser narrow-beam light scattering technology, the instrument achieves enhanced signal-to-noise ratio and improved resolution across the 0.03–300 µm detection range. Its core measurement principle relies on single-particle optical sensing (SPOS), wherein each particle passing through the focused laser interrogation zone generates a scattered light pulse proportional to its cross-sectional area. This enables direct, calibration-traceable enumeration without reliance on ensemble averaging—critical for detecting low-concentration, oversized contaminants in coal powder handling systems, thermal power plant feedwater circuits, or coal liquefaction process streams.

Key Features

• Dual-laser narrow-beam optical sensor architecture with independent wavelength channels for improved discrimination of refractive index variations and reduced Mie scattering artifacts.
• Integrated precision plunger pump and electromagnetic flow regulation system ensuring volumetric sampling accuracy better than ±1% and repeatability under continuous operation.
• Configurable detection thresholds: standard mode (0.03–300 µm), plus user-defined windows including 1–100 µm, 4–70 µm(c), and 0.1 µm(c) for compliance with pharmacopeial or military-grade specifications.
• Real-time analog output (4–20 mA) with programmable alarm logic for integration into DCS/SCADA environments—enabling automated shutdown or filter bypass upon exceedance of preset particle concentration limits.
• Touchscreen HMI with intuitive workflow navigation; supports optional wireless keyboard/mouse for lab-based offline analysis and report generation.
• Robust mechanical design compliant with IP54 environmental rating, suitable for deployment in industrial control rooms or near coal pulverizing equipment.

Sample Compatibility & Compliance

The PMT-20 accommodates a broad spectrum of liquid matrices, including aqueous coal slurries, organic solvents, polymer solutions, deionized water, and cleaning formulations used in electronics manufacturing. It meets methodological requirements specified in multiple international standards: Chinese Pharmacopoeia (2015 & 2020 Editions), United States Pharmacopeia , European Pharmacopoeia 2.9.19, British Pharmacopoeia, and GB 8368 for medical device fluid cleanliness. Calibration traceability follows ISO 21501-4 for liquid-borne particle counters and JJG 1061 national metrological verification regulations. Optional NIST-traceable polystyrene latex (PSL) sphere calibration ensures long-term measurement stability and audit readiness for GLP/GMP-regulated environments.

Software & Data Management

PULUODY V8.3 software provides fully integrated analysis, calibration management, and reporting modules—designed to maintain strict separation between test execution and calibration validation workflows per FDA 21 CFR Part 11 requirements. The platform supports multi-user role-based access control, electronic signatures, and full audit trail logging of all measurement events, parameter changes, and calibration interventions. Data export options include CSV, PDF, and XML formats compatible with LIMS integration. iPad-compatible remote acquisition allows field technicians to monitor real-time particle trends during coal mill commissioning or filter integrity verification without physical console access.

Applications

Primary use cases span coal-fired power generation, coal chemical processing, and industrial fluid cleanliness assurance. In coal pulverizing systems, the PMT-20 detects oversized particles (>75 µm) that may cause nozzle erosion or incomplete combustion. For coal-water slurry (CWS) preparation, it verifies micronization consistency prior to injection into gasifiers. Additional applications include monitoring particulate carryover in closed-loop cleaning baths for photovoltaic wafers, validating ultrafiltration membrane performance in nanofiltration skids, and quantifying insoluble microcontaminants in pharmaceutical excipient solvents. Its modular architecture supports both permanent online installation (with wetted materials rated for ASTM A105/NACE MR0175 compatibility) and portable offline verification.

FAQ

What particle size ranges are factory-calibrated and validated?
The base configuration is calibrated from 0.03 µm to 300 µm using NIST-traceable PSL standards; sub-range calibrations (e.g., 4–70 µm(c)) require separate verification per ISO 21501-4 Annex B.
Can the PMT-20 be integrated into an existing PLC-controlled coal handling system?
Yes—via isolated 4–20 mA analog output with configurable alarm thresholds and Modbus RTU option (optional add-on module).
Is sample pre-filtration required before analysis?
No pre-filtration is needed for standard operation; however, gross debris >500 µm should be removed via 100 µm guard screen to protect the flow cell and pump mechanism.
How does the instrument handle high-concentration coal slurries without clogging?
The flow path features a self-cleaning vortex chamber and pressure-compensated inlet design; recommended maximum solids loading is 0.5 wt% for continuous online use.
Does the software support automated report generation per ISO 4406:2017?
Yes—V8.3 includes embedded algorithms for automatic code assignment (e.g., 18/16/13) based on cumulative counts at 4 µm(c), 6 µm(c), and 14 µm(c) thresholds, fully compliant with ISO 4406:2017 and NAS 1638 methodologies.