Tianhong TH-3150 Ambient Air and Particulate Matter Integrated Sampler

Overview

The Tianhong TH-3150 Ambient Air and Particulate Matter Integrated Sampler is a field-deployable, dual-mode environmental sampling instrument engineered for simultaneous, independent collection of gaseous pollutants (e.g., SO₂, NOₓ, CO) and airborne particulate matter (TSP, PM₁₀, PM₅, PM₂.₅) under ambient conditions. It operates on the principle of controlled volumetric aspiration—employing micro-orifice-based flow dynamics coupled with closed-loop electronic feedback regulation to maintain stable, traceable airflow across variable backpressure conditions. Designed in accordance with Chinese national standards GB/T 15432–1995 (gravimetric determination of total suspended particulates), HJ/T 374–2007 (technical specifications for TSP samplers), and HJ/T 368–2007 (calibration requirements for orifice flow meters), the TH-3150 supports regulatory-grade data acquisition for air quality monitoring networks, ambient station validation, and source emission characterization. Its modular architecture enables compliance-ready deployment in both fixed-site and mobile monitoring applications.

Key Features

• Dual-path sampling system: Five independent channels—four gas channels and one particulate channel—with fully isolated flow control and real-time pressure compensation.
• Industrial-grade semiconductor thermoelectric cooling/heating modules for absorption bottle temperature stabilization; dual-sensor thermal monitoring ensures ±1.5 °C uniformity across full operating range (−20 °C to +40 °C).
• Micro-orifice constant-flow control augmented by PID-regulated DC brushless vacuum pumps, delivering ≤5 % flow deviation over 10-hour continuous operation at maximum load (30,000 Pa backpressure).
• Particulate module powered by maintenance-free DC brushless motor (rated life ≥6,000 h), optimized for low acoustic emission (<52 dB(A) at 1 m).
• Gas module equipped with high-efficiency imported DC brushless micro-pumps and integrated desiccant drying traps to prevent moisture ingress into sampling lines.
• Multi-mode operational logic: Standard time-based, interval, constant-volume, and scientific programmable modes—with automatic standard-condition (0 °C, 101.325 kPa) volume correction using onboard barometric and ambient temperature sensors.
• OLED wide-temperature display (−30 °C to +70 °C operational range) with Chinese/English bilingual interface and backlight optimization for low-illumination field use.
• Onboard non-volatile memory stores ≥50 complete sampling event records—including timestamps, flow logs, pressure/temperature traces, alarm flags, and power interruption history.

Sample Compatibility & Compliance

The TH-3150 accommodates standard EPA/ISO-compliant sampling media: quartz fiber filters (PM₂.₅/PM₁₀), cellulose ester membranes (TSP), impingers and bubblers (for SO₂, NOₓ, NH₃), and diffusion scrubbers (for ozone). All gas channels support interchangeable electronic mass flow meters (optional) certified to ISO 5167 and traceable to NIM (National Institute of Metrology, China). The instrument’s firmware and hardware architecture are designed to meet GLP-aligned data integrity requirements—including audit-trail-enabled calibration logging, user-level password protection (three-tier access), and tamper-evident timestamping. While not pre-certified for FDA 21 CFR Part 11, its data export protocols (CSV/USB) and metadata tagging structure facilitate integration into validated laboratory information management systems (LIMS) supporting ISO/IEC 17025 workflows.

Software & Data Management

Field data are stored in structured binary format with embedded CRC-32 checksums. A dedicated PC utility (Windows/Linux compatible) enables secure download, parameter reconfiguration, and calibration coefficient updates via USB-C interface. All calibration events—including flow verification, temperature offset adjustment, and pressure sensor zeroing—are logged with operator ID, date/time stamp, and pre/post-adjustment values. Wireless thermal printing (Bluetooth 5.0) supports on-site hardcopy generation of sampling reports with QR-coded metadata for chain-of-custody tracking. Firmware supports over-the-air updates via encrypted USB key, with rollback capability and version-signed bootloaders to ensure runtime integrity.

Applications

• Ambient air quality monitoring per China’s “Environmental Air Quality Standards” (GB 3095–2012) and EU Directive 2008/50/EC.
• Source apportionment studies requiring co-located gaseous and particulate sampling (e.g., traffic corridors, industrial perimeters, landfill boundaries).
• Method validation and inter-laboratory comparison exercises involving gravimetric PM analysis and wet-chemical gas absorption.
• Short-term exposure assessment for occupational health surveys where portability and multi-analyte capture are critical.
• Calibration verification of continuous emission monitoring systems (CEMS) using reference-grade manual sampling protocols.

FAQ

Does the TH-3150 support simultaneous PM₂.₅ and SO₂ sampling on separate channels?

Yes—each of the four gas channels and the dedicated particulate channel operate independently with individual flow control, enabling concurrent collection without cross-interference.
Is flow calibration traceable to national metrological standards?

Yes—electronic flow meters (optional) are factory-calibrated against NIM-certified primary standards; certificate of calibration includes uncertainty budget per ISO/IEC 17025 Annex A.
Can the instrument operate unattended for extended periods?

It supports scheduled start/stop, power-failure recovery with configurable resume logic (volume补时 or time补时), and internal battery backup for critical status retention during AC loss.
What maintenance intervals are recommended for long-term reliability?

Pump diaphragms and desiccant cartridges require replacement every 1,500 operating hours; filter elements and orifice plates should be inspected quarterly per HJ/T 374–2007 preventive maintenance guidelines.
Is remote firmware update supported?

Firmware updates are performed offline via authenticated USB key; no internet connectivity is required, ensuring security in air-gapped monitoring environments.