Dr. Durrand PNS16T Automated Continuous Particulate Matter Sampling System (PM2.5-Enabled)

Overview

The Dr. Durrand PNS16T is a CE-marked, EU-compliant automated continuous particulate matter (PM) sampling system engineered for regulatory-grade ambient air monitoring of PM_2.5, PM₁₀, and total suspended particulates (TSP). It operates on the gravimetric principle—collecting airborne particles onto standardized 47 mm diameter quartz or Teflon filters under precisely controlled volumetric flow conditions—and is validated per CEN EN 12341:2014 (ambient air—standardization of measurement methods for PM₁₀ and PM_2.5) and ISO 7708:1995 (particle size-selective sampling criteria). Designed for unattended operation over extended periods (up to 15 days), the system integrates thermoelectric (Peltier) cooling, optical flow stabilization, and real-time environmental compensation to ensure metrological integrity across variable ambient temperature and humidity conditions. Its deployment aligns with EU Directive 2008/50/EC and supports compliance reporting for national air quality management plans.

Key Features

• Automated sequential sampling across up to 15 pre-programmed filter positions, supporting flexible time-based, volume-based, or stage-based protocols
• Peltier-cooled cold box maintaining filter storage at ≤4 °C to minimize hygroscopic growth, volatilization, and microbial activity during extended collection cycles
• Optically isolated, anodized aluminum sampling chamber with electropolished internal surfaces to suppress turbulent deposition and wall loss of fine particles
• Dual-stage flow control system with integrated mass flow sensor and feedback-regulated diaphragm pump, achieving ±2% full-scale accuracy across 1.0–3.5 Nm³/h range
• Modular inlet configuration compatible with certified PM_2.5, PM₁₀, and TSP impactor heads meeting EN 12341 and ISO 21507 specifications
• JOG-DIAL rotary controller with backlit graphical LCD interface enabling intuitive navigation, real-time status visualization, and field parameter adjustment without PC dependency
• Active thermal and humidity compensation algorithm compliant with IDEAL (ISO/IEC 17025-aligned environmental control framework) for traceable flow correction
• RS232C serial interface supporting bidirectional communication with central data loggers or SCADA systems; firmware updates via FLASH-RAM memory

Sample Compatibility & Compliance

The PNS16T accommodates standard 47 mm circular filters (effective filtration area: 41 mm Ø), including quartz fiber, polytetrafluoroethylene (PTFE), and cellulose ester membranes used in reference-grade gravimetric analysis. All hardware components—including inlet manifolds, cyclones, and filter holders—are constructed from non-reactive, low-outgassing materials (anodized aluminum, stainless steel, and fluoropolymer seals) to prevent adsorption artifacts. The system meets the mechanical and metrological requirements of CEN EN 12341:2014 Annex A (performance criteria for PM samplers), EN 13272:2002 (ambient air—sampling pumps), and ISO 5725 (accuracy and precision of measurement methods). It is routinely deployed as a reference method platform in European national air quality networks and fulfills GLP audit readiness for accredited laboratories.

Software & Data Management

Data acquisition and instrument control are managed via embedded firmware supporting three operational modes: time-integrated sampling (1 h–1000 h), volume-triggered cycles, and multi-stage programmable sequences. Flow rate, ambient temperature, relative humidity, pump voltage, and filter position status are logged at user-defined intervals (default: 1 min) into non-volatile memory. Raw datasets export in ASCII CSV format via RS232C, compatible with EPA AQS, EEA AirBase, and custom LIMS environments. Firmware revision history, calibration logs, and audit trails—including operator ID, timestamped parameter changes, and error flags—are retained in tamper-resistant FLASH-RAM. Optional integration with third-party middleware enables 21 CFR Part 11–compliant electronic signatures and role-based access control when deployed in regulated QA/QC settings.

Applications

• Long-term ambient air quality monitoring stations (urban, rural, traffic, background)
• Reference and equivalent method validation studies per EU Commission Regulation (EU) 2016/429
• Source apportionment campaigns requiring high-temporal-resolution filter sets for subsequent elemental carbon (EC/OC), ion chromatography (IC), or ICP-MS analysis
• Calibration transfer between reference and indicative measurement systems
• Field intercomparison exercises coordinated by EMEP, ACTRIS, or WHO Air Quality Monitoring Networks
• Indoor air quality assessments in sensitive environments (hospitals, cleanrooms, schools) where low-noise operation (<35 dB(A)) is mandatory

FAQ

What standards does the PNS16T comply with for PM_2.5 and PM₁₀ sampling?
It conforms to CEN EN 12341:2014, ISO 21507:2017, and EU Directive 2008/50/EC for reference method equivalence.
Can the system operate unattended for the full 15-day cycle?
Yes—autonomous operation is supported by internal battery-backed clock, non-volatile logging, and Peltier-cooled filter storage.
Is humidity compensation handled automatically during sampling?
Yes—the system implements real-time relative humidity and temperature compensation using integrated sensors and IDEAL-aligned algorithms.
What filter types are validated for use with this sampler?
Quartz fiber (e.g., Pallflex TX40HI20WW), PTFE membrane (e.g., SKC PVC-free), and cellulose ester filters meeting ISO 9001-certified manufacturing specifications.
How is flow calibration maintained over long deployments?
Primary calibration is performed using traceable primary standards (e.g., dry calibrators per ISO 6145); secondary verification is enabled via built-in leak-check routines and pressure-drop diagnostics.