Tianhong TH-2000PM-02 Portable Ambient Particulate Matter (PM10/PM2.5) Monitor

Overview

The Tianhong TH-2000PM-02 is a field-deployable, regulatory-grade ambient particulate matter monitor engineered for continuous, unattended measurement of PM₁₀ and PM_2.5 mass concentrations in outdoor environments. It operates on the β-ray attenuation principle—where airborne particles are collected on a quartz fiber tape, and the attenuation of beta radiation (from a certified low-activity ¹⁴C source) is quantified to determine gravimetric mass concentration in real time. Integrated Dynamic Heating System (DHS) mitigates volatilization losses of semi-volatile compounds—including ammonium nitrate and organic aerosols—ensuring compliance with HJ 653–2013, China’s national technical specification for continuous PM monitoring systems. The instrument is designed for high reproducibility across variable climatic conditions, with active temperature and humidity compensation algorithms applied to raw attenuation signals and volumetric flow corrections.

Key Features

• β-ray attenuation-based gravimetric measurement—no empirical correction factors required for particle composition or hygroscopicity
• Dynamic Heating System (DHS) maintains filter tape temperature above ambient dew point to minimize semi-volatile artifact
• Stable volumetric flow control (16.7 L/min ±2%) across −30 °C to +60 °C using precision servo-valve and inverter-driven pump regulation
• Interchangeable, certified PM₁₀ and PM_2.5 sharp-cut cyclones—validated by the Chinese Center for Disease Control and Prevention (China CDC), Environment and Health Related Product Safety Institute
• Onboard environmental sensors: NTC thermistor (±0.3 °C), capacitive humidity sensor (±2% RH), piezoresistive barometer (±0.1 kPa)—used for automatic standard-condition (25 °C, 101.325 kPa) volume conversion
• 7-inch capacitive touchscreen with intuitive Chinese-language interface; one-touch startup, no configuration required for routine operation
• Embedded diagnostics: real-time tape tension monitoring, motor current profiling, heater status verification, and automated fault flagging with remote alert via GPRS
• Radiation safety compliant: ¹⁴C source licensed under China’s National Radiation Safety Permit framework; dose rate <0.1 µSv/h at 10 cm

Sample Compatibility & Compliance

The TH-2000PM-02 is validated for ambient air sampling in urban, industrial, roadside, construction site, and rural background settings. Its cutting-edge DHS architecture ensures robust performance under high-humidity and low-temperature conditions where traditional tapered element oscillating microbalance (TEOM) or optical scattering instruments exhibit significant bias. All mechanical components—including the cyclone inlets, filter tape transport mechanism, and radiation chamber—are constructed from corrosion-resistant stainless steel and anodized aluminum to withstand long-term field exposure. The system meets HJ 653–2013 requirements for accuracy (±10% of reference method), precision (≤5% CV), lower detection limit (≤2 µg/m³ for PM_2.5), and data availability (>95% per month). While not pre-certified to ISO 12103-1 or EN 12341, its measurement traceability aligns with national reference methods used in China’s national air quality monitoring network (CNEMC).

Software & Data Management

Data acquisition and instrument control are managed via embedded Linux-based firmware with dual storage layers: volatile RAM for real-time buffering and non-volatile flash memory for hourly averaged records (including PM₁₀, PM_2.5, flow, temperature, RH, pressure, tape position, and diagnostic flags). Raw data export is supported via USB mass storage (FAT32) in CSV format with ISO 8601 timestamps. Integrated GPRS module enables secure TLS-encrypted transmission to Tianhong’s cloud platform, accessible via web dashboard or proprietary Android/iOS application. Remote firmware updates, parameter reconfiguration, and alarm threshold adjustments are supported over-the-air. Digital I/O (RS232/RS485) allows seamless integration with third-party data loggers and SCADA systems. Audit trails for critical events—including calibration initiations, tape changes, and error resets—are timestamped and retained for ≥180 days, supporting GLP-aligned operational documentation.

Applications

• High-resolution spatial monitoring in urban air quality grids (e.g., 1 km × 1 km node deployment)
• Real-time dust emission tracking at construction sites and open-pit mining operations
• Mobile monitoring campaigns using vehicle-mounted or backpack configurations
• Supplemental validation of satellite-derived AOD products and regional chemical transport models
• Regulatory enforcement support for environmental inspection teams conducting spot-checks and complaint investigations
• Long-term trend analysis in ecological monitoring stations and national parks

FAQ

What regulatory standards does the TH-2000PM-02 comply with?

It is fully aligned with HJ 653–2013, the official Chinese technical specification for continuous PM₁₀/PM_2.5 monitoring systems, including requirements for accuracy, precision, dynamic range, and data reporting formats.
Can the instrument operate unattended for extended periods?

Yes—designed for continuous 24/7 operation with up to 30 days of filter tape autonomy, onboard power management, and GPRS-based remote health monitoring.
Is external calibration required?

No routine calibration is needed; the β-ray method is inherently absolute. However, annual verification against a certified reference instrument (e.g., gravimetric filter-based analyzer per HJ 653 Annex B) is recommended for QA/QC.
How is data integrity ensured during network outages?

All measurements are stored locally on-device with time-stamped records. Upon network recovery, buffered data is automatically synchronized without loss or duplication.
Does the system support multi-parameter expansion?

Yes—optional modules include GPS geotagging, ultrasonic anemometry, Class 2 sound level metering, and 1080p IP video capture, all synchronized to the same timestamp base.