Tianhong TH-16E Full-Automatic Filter-Changing Ambient Particulate Matter Sampler

Overview

The Tianhong TH-16E Full-Automatic Filter-Changing Ambient Particulate Matter Sampler is a precision-engineered, field-deployable instrument designed for gravimetric monitoring of airborne particulate fractions—including Total Suspended Particulates (TSP), PM₁₀, PM_2.5, and PM_1.0—in accordance with internationally recognized atmospheric sampling principles. It operates on constant-flow volumetric sampling using a calibrated mass flow control system, ensuring adherence to the fundamental requirement of ISO 7708:1995 (airborne particles—definition and particle size classification) and U.S. EPA Reference Method PS-1 for PM_2.5 samplers. The TH-16E employs a robust brushless DC vacuum motor coupled with real-time pressure compensation algorithms to maintain a stable 16.67 L/min flow rate across variable filter loading conditions and ambient temperature fluctuations (−20 °C to +50 °C). Its core architecture supports regulatory-compliant manual reference measurements, serving as an essential validation tool for continuous ambient air monitoring stations operating under national or regional air quality management frameworks.

Key Features

• 16-position automated filter carousel enabling unattended sequential sampling over extended periods without manual intervention;
• Integrated low-temperature sample preservation module (optional refrigeration to +4 °C) minimizing volatile organic compound (VOC) loss and hygroscopic artifact formation during collection;
• High-torque electromechanical filter changer with position-sensing feedback, independent of ambient thermal drift;
• Embedded 32-bit RISC microcontroller with deterministic real-time scheduling for precise timing control of sampling cycles, flow calibration, and error diagnostics;
• 7-inch industrial-grade capacitive touchscreen with intuitive Chinese-language GUI, supporting multi-level user access (operator, technician, administrator);
• Configurable sampling protocols—including time-integrated, scheduled multi-cycle, and event-triggered modes—with programmable start/stop times, duration, and inter-sample intervals;
• Onboard environmental sensor suite measuring and logging ambient temperature, relative humidity, barometric pressure, and motor vacuum load in real time;
• Non-volatile memory with automatic power-fail recovery: retains all configuration settings, timestamps, and cumulative operational metrics (e.g., total runtime, filter usage count, fault logs);
• USB 2.0 host interface for secure data export in CSV format; optional Ethernet or 4G LTE module enables remote firmware updates and live status telemetry via HTTP/HTTPS API;
• Structural design optimized for outdoor cabinet integration or rooftop mounting, meeting IP54 ingress protection requirements for dust and water resistance.

Sample Compatibility & Compliance

The TH-16E is compatible with standard 47-mm diameter filters—including quartz fiber, Teflon-coated glass fiber, polytetrafluoroethylene (PTFE), and mixed cellulose ester (MCE)—enabling flexibility in analytical downstream workflows such as gravimetric mass determination (per HJ 618–2011), ion chromatography, elemental analysis (ICP-MS), and organic carbon/elemental carbon (OC/EC) speciation. Its mechanical and aerodynamic design conforms to HJ 93–2013 (technical specifications for PM₁₀/PM_2.5 samplers), HJ/T 374–2007 (TSP sampler standards), and Q/WTH 03–2014 (enterprise standard governing TH-16E performance). While not certified as a U.S. EPA Federal Equivalent Method (FEM) device, its flow control accuracy (≤ ±1% deviation), pressure handling capability (>20 kPa), and long-term stability align with the functional benchmarks defined in EPA Guidance Document QA/G-5 (2019) for reference and equivalent method samplers used in audit and comparison studies.

Software & Data Management

Data acquisition and instrument control are managed by embedded firmware compliant with GLP-aligned data integrity principles. All critical events—including filter change timestamps, flow deviations exceeding ±0.5%, motor overload warnings, and power interruption records—are stored with millisecond-resolution timestamps and immutable audit trails. Exported datasets include metadata headers specifying instrument ID, calibration certificate number, operator code, and environmental context. Optional cloud-based platform integration supports automated ingestion into laboratory information management systems (LIMS) and enables role-based access control for QA/QC review. The system supports 21 CFR Part 11–compliant electronic signatures when deployed with external authentication modules and time-stamped digital certificates.

Applications

• Regulatory compliance monitoring for national ambient air quality standards (e.g., China’s GB 3095–2012, EU Directive 2008/50/EC);
• Method validation and co-location studies between continuous analyzers (e.g., beta attenuation monitors, tapered element oscillating microbalances) and gravimetric reference methods;
• Source apportionment campaigns requiring high-temporal-resolution filter archives for receptor modeling;
• Indoor air quality assessments in schools, hospitals, and occupational environments;
• Research-grade aerosol characterization in atmospheric science laboratories, including hygroscopic growth factor studies and filter-based optical property analysis;
• Long-term trend analysis of particulate composition across seasonal and interannual scales.

FAQ

What filter types are supported by the TH-16E?
The sampler accommodates standard 47-mm circular filters, including quartz fiber, PTFE, nylon, and MCE membranes—compatible with both gravimetric and chemical analysis workflows.
Does the TH-16E meet U.S. EPA equivalency requirements?
It is not EPA-certified as a Federal Equivalent Method (FEM) device; however, its metrological performance satisfies technical criteria outlined in EPA QA/G-5 for reference method comparability studies.
Can the instrument operate continuously for more than 24 hours?
Yes—when configured with appropriate filter capacity and power supply redundancy, it supports uninterrupted operation across multi-day sampling campaigns, subject to local regulatory duty-cycle limits.
Is remote diagnostics available without physical access?
With optional 4G or Ethernet connectivity, users can monitor real-time status, retrieve historical logs, and initiate diagnostic routines via secure web interface or RESTful API.
How is flow calibration traceability ensured?
Each unit ships with a NIST-traceable calibration certificate issued against primary standards; field recalibration is supported using certified dry calibrators (e.g., Gilibrator, Mesa Labs FlowCal) with onboard verification routines.