Tianhong TH-1000H Intelligent High-Flow Air Particulate Sampler

Overview

The Tianhong TH-1000H Intelligent High-Flow Air Particulate Sampler is an engineered solution for standardized, long-term ambient air monitoring of total suspended particulates (TSP), inhalable particles (PM₁₀), and fine particulate matter (PM_2.5). Designed in strict compliance with Chinese national environmental monitoring standards—including GB/T 15432–1995 (gravimetric determination of TSP), HJ/T 374–2007 (technical specifications for TSP samplers), HJ/T 368–2007 (orifice flowmeter calibration requirements), and JJG 943–2011 (verification regulation)—the TH-1000H implements constant-temperature constant-flow sampling principles based on real-time micro-pressure and temperature feedback control. Its core operational architecture relies on a low-power embedded microprocessor coupled with high-accuracy differential pressure and ambient temperature sensors, enabling closed-loop flow regulation under variable filter loading and atmospheric conditions. The instrument maintains volumetric flow integrity across diverse field environments—particularly critical for regulatory-grade gravimetric analysis where sample volume accuracy directly determines mass concentration calculation traceability.

Key Features

• Intelligent flow control: Real-time compensation for filter resistance buildup and ambient temperature fluctuations ensures flow stability ≤3% over 24-hour cycles.
• Rugged all-weather housing: IP-rated rain-resistant enclosure with integrated thermal management supports unattended outdoor deployment in temperatures ranging from −20 °C to +50 °C.
• Fast dynamic response: Flow regulation recovery time <5 seconds following step changes in system backpressure—critical during filter breakthrough or sudden wind-load events.
• Energy-resilient operation: Built-in power-fail protection retains all sampling metadata (elapsed time, cumulative standard-volume, average temperature/flow) and resumes sampling automatically upon grid restoration.
• Modular particulate fractionation: Compatible with certified PM₁₀ and PM_2.5 impactor heads meeting ISO 7708 and EPA reference method geometries—enabling multi-fraction co-sampling on a single platform.
• Human-centered interface: Integrated electronic control panel with tactile membrane keys, LCD display, and foldable tripod mount simplifies field setup and reduces operator training burden.

Sample Compatibility & Compliance

The TH-1000H is validated for use with standard 203 mm × 254 mm quartz fiber or PTFE membrane filters, supporting gravimetric analysis per ISO 12103-1 and US EPA Method IO-2. It meets the mechanical and metrological requirements of HJ/T 374–2007 for TSP samplers, including flow accuracy (±2.5%), vacuum capability (≥30 kPa), and continuous duty rating (10 h at maximum load). While primarily deployed in national and provincial environmental monitoring networks in China, its design principles align with broader international frameworks—such as ISO 10473 (ambient air—determination of particulate matter mass concentration) and EN 12341 (ambient air quality—measurement of PM₁₀ and PM_2.5). All firmware and data logging functions adhere to GLP-compliant audit trail principles, with timestamped event logs covering power cycles, flow deviations >2%, and user-initiated parameter changes.

Software & Data Management

Data acquisition is performed autonomously without external PC dependency. Internal non-volatile memory stores time-stamped records of instantaneous flow (L/min), ambient temperature (°C), barometric pressure (kPa), cumulative volumetric flow (m³ at standard conditions: 273.15 K, 101.325 kPa), and elapsed sampling duration. Export is supported via USB 2.0 interface using plain-text CSV format—ensuring compatibility with laboratory information management systems (LIMS) and statistical analysis platforms such as R or Python-based QA/QC pipelines. No proprietary drivers or cloud dependencies are required; raw logs include checksum-verified headers for data integrity validation. Firmware updates are delivered via signed binary packages to prevent unauthorized modification—supporting regulatory readiness for internal audits and third-party verification.

Applications

• Regulatory ambient air quality monitoring networks (AAQMN) conducting routine TSP, PM₁₀, and PM_2.5 surveillance per national emission standards.
• Source apportionment studies requiring co-located, time-synchronized particulate sampling across multiple size fractions.
• Method validation and inter-laboratory comparison exercises under CNAS (China National Accreditation Service) or ILAC-MRA frameworks.
• Long-term trend analysis in urban, industrial, and background sites—leveraging 6,000-hour rated pump life to minimize maintenance frequency and operational downtime.
• Field calibration support for optical particle counters and beta attenuation monitors (BAMs) through parallel gravimetric reference sampling.

FAQ

Does the TH-1000H comply with U.S. EPA or EU reference methods?
It conforms to Chinese national standards (HJ/T 374–2007, GB/T 15432–1995) and shares functional equivalence with EPA Reference Method PS-1 and EN 12341 for PM₁₀/PM_2.5 sampling—but formal EPA or CEN certification is not held.
What filter types are supported?
Standard 203 mm × 254 mm quartz fiber (e.g., Pallflex E70-2075), Teflon-coated glass fiber, and polytetrafluoroethylene (PTFE) membranes—compatible with both gravimetric and subsequent elemental analysis (ICP-MS, XRF).
Can it operate continuously for more than 24 hours?
Yes—designed for unattended 24-hour+ operation; battery backup option extends runtime beyond grid outages, and the 6,000-hour pump service life supports multi-month deployments with scheduled filter changes.
Is remote monitoring or telemetry available?
No built-in cellular or Ethernet module; however, the USB data export protocol enables integration with external telemetry gateways via custom scripting or middleware solutions.
How is flow calibration verified?
Calibration is performed using a traceable primary standard orifice flowmeter per HJ/T 368–2007; field verification requires periodic checks with a NIST-traceable dry gas meter or bubble flowmeter at operating pressure and temperature.