Derenda MVS Portable Single-Filter Particulate Matter Sampler

Overview

The Derenda MVS Portable Single-Filter Particulate Matter Sampler is a precision-engineered, field-deployable instrument designed for gravimetric and compositional analysis of airborne particulate matter—including PM₁₀, PM₂.₅, and PM₁.₀—according to European reference measurement standards. Based on the CEN/TS 12341:2014 and EN 14907:2005 methodologies, the MVS serves as an official EU reference sampler, used by accredited laboratories and notified bodies for equivalence testing of newly introduced samplers across the European Economic Area. Its core operation relies on isokinetic, constant-flow sampling through standardized 47 mm diameter filters, with real-time compensation for ambient temperature, relative humidity, barometric pressure, and filter loading resistance. The system employs a high-efficiency brushless DC pump capable of sustaining stable flow rates up to 4.5 m³/h against backpressures exceeding 50 kPa—ensuring reliable performance under high-dust-load or low-temperature field conditions.

Key Features

• Compact, ergonomic design optimized for unattended outdoor deployment; weight of ~17 kg enables single-operator transport and mounting on tripods or fixed monitoring stations.
• Dual-mode user interface: tactile rotary encoder combined with responsive capacitive touchscreen for intuitive parameter configuration and status monitoring—even with gloved hands.
• Integrated RFID-enabled filter holder (patent EP2982928B1 / CN2015110108430) enabling automatic recognition of filter lot number, calibration certificate ID, and expiration date—eliminating manual logging errors.
• Optional 3G/4G LTE module supporting secure TLS 1.2 encrypted data transmission to centralized cloud platforms (e.g., ISO/IEC 27001-compliant infrastructure), with configurable reporting intervals and alarm thresholds.
• Expandable sensor interface supporting co-located meteorological modules (wind speed/direction, temperature, humidity, atmospheric pressure) for integrated spatiotemporal correlation of PM mass concentration with local dispersion dynamics.
• Real-time graphical display of critical sampling parameters—including differential membrane pressure, ambient T/RH, and barometric pressure—rendered as synchronized time-series curves with auto-scaling axes.
• Modular architecture allows seamless integration of the Automatic Filter Changer (AFC) unit, transforming the MVS into a multi-filter sequential sampling platform compliant with EN 12341 Annex B and US EPA Method IO-3.1 requirements.

Sample Compatibility & Compliance

The MVS is validated for use with standard quartz fiber (QFF), PTFE, and cellulose ester filters conforming to ISO 9001-certified manufacturing specifications. It meets the mechanical, thermal, and flow-dynamic requirements defined in EN 12341:2014 (for PM₁₀) and EN 14907:2005 (for PM₂.₅), including inlet aspiration efficiency, particle size cut-point sharpness (δ₅₀), and flow stability under variable environmental loads. All firmware and hardware configurations undergo annual third-party verification by DAkkS-accredited test laboratories per ISO/IEC 17025. Data integrity adheres to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available), with optional audit-trail logging aligned with FDA 21 CFR Part 11 and EU Annex 11 requirements for regulated environmental monitoring programs.

Software & Data Management

The embedded firmware supports dual operating modes: standalone logging (with >1 million timestamped records stored locally on industrial-grade microSD) and networked operation via Derenda CloudLink™—a web-based dashboard offering role-based access control, automated report generation (PDF/CSV), and configurable alerting (SMS/email). All raw sensor data—including flow rate, pressure drop across the filter, temperature, humidity, and battery voltage—are logged at 1-second resolution and aggregated into regulatory-compliant 5-minute summary files. Remote firmware updates are digitally signed and verified using ECDSA-256 cryptographic signatures. Audit logs record every configuration change, user login, and data export event with immutable timestamps and operator IDs.

Applications

• Regulatory ambient air quality monitoring networks (AQMN) requiring EN-compliant reference-grade PM data for national reporting to EEA and Copernicus Atmosphere Monitoring Service (CAMS).
• Source apportionment studies combining ion chromatography (IC), ICP-MS, and GC-MS analysis of collected filters to quantify crustal elements, secondary inorganic aerosols, and organic molecular markers.
• Health impact assessment campaigns where synchronized PM mass and meteorological data support exposure modeling (e.g., CALPUFF, AERMOD).
• Calibration and validation of low-cost optical sensors and β-attenuation monitors (BAMs) in intercomparison studies conducted under ISO 5725-2 repeatability conditions.
• Long-term trend analysis in remote or extreme-climate environments (Arctic, alpine, desert), enabled by −30°C cold-start capability and IP55-rated enclosure.

FAQ

Is the MVS certified as an official EU Reference Sampler?
Yes—the MVS is formally recognized as the designated reference instrument for equivalence testing under EN 12341 and EN 14907 by multiple EU Notified Bodies, including TÜV Rheinland and Dekra.
Can the MVS operate continuously for extended periods without maintenance?
With its brushless DC pump rated for >50,000 hours at maximum load and sealed bearing design, the MVS supports unattended operation for up to 999 hours per sampling cycle, with routine filter changes required only after each run.
Does the system support GLP/GMP-compliant data handling?
When configured with CloudLink™ Audit Mode, the MVS provides full 21 CFR Part 11-compliant electronic records, including digital signatures, change history, and immutable audit trails for all critical operations.
What filter types are compatible with the 47 mm holder?
Standard 47 mm circular filters meeting ISO 12103-1 (A2 test dust compatibility) and EN 12341 Annex A specifications—including Whatman QMA, Pallflex Tissuquartz, and Sartorius NYLAFLO—can be used without adapter modification.
How is flow accuracy maintained during long-term field deployment?
The MVS incorporates dual-stage thermal mass flow sensing with continuous zero-drift compensation, calibrated traceably to NIST SRM 1650b (urban particulate matter) and verified daily via built-in leak-check routines and pressure decay tests.