Tianhong TH-110H Coarse & Fine Particulate Matter Dual-Channel Ambient Air Sampler

Overview

The Tianhong TH-110H Coarse & Fine Particulate Matter Dual-Channel Ambient Air Sampler is an engineered solution for regulatory-grade atmospheric particulate monitoring in field and fixed-site applications. It operates on the principle of size-selective isokinetic sampling—separating airborne particles into coarse (PM₁₀) and fine (PM_2.5) fractions using certified impactor-based inlet assemblies (not included but compatible with standard EPA/ISO-compliant cyclones or virtual impactors). The instrument employs dual independent mass flow control loops to maintain precise, traceable volumetric flow rates across both sampling channels simultaneously—critical for concurrent gravimetric analysis of respirable and inhalable particulate fractions under varying ambient conditions. Its embedded environmental sensors continuously record real-time barometric pressure, ambient temperature, and sampling bottle temperature—enabling automatic correction to standard reference conditions (25°C, 101.325 kPa) per ISO 7708 and US EPA Method 201A conventions.

Key Features

• Dual-channel independent flow control: Each channel supports fully configurable flow settings from 0.1 to 1.0 L/min, adjustable in 1 mL/min increments, with closed-loop feedback via calibrated thermal mass flow meters.
• High-reliability sampling architecture: Brushless DC vacuum pumps ensure low acoustic emission (<60 dB[A]), extended service life, and minimal maintenance—validated for continuous operation over 10,000 hours.
• Intelligent thermal management: Integrated PTC heating elements activate automatically when sampling bottle temperature falls below 20°C, preventing condensation-induced filter artifact and ensuring consistent collection efficiency.
• Robust data integrity framework: All measurements—including flow, temperature, pressure, elapsed time, and calculated standard-volume—are timestamped and stored locally with non-volatile memory. No external PC required for basic operation or data retrieval.
• Field-optimized human interface: 4.3-inch sunlight-readable capacitive touchscreen with intuitive Chinese-language workflow guidance—designed for rapid deployment by technicians without specialized software training.
• Flexible power architecture: Supports simultaneous AC mains operation and onboard rechargeable lithium-ion battery backup—delivering up to 24 hours of uninterrupted dual-channel sampling at 0.2 L/min per channel.

Sample Compatibility & Compliance

The TH-110H is configured for use with standard 47-mm quartz fiber or PTFE membrane filters housed in stainless-steel or anodized aluminum filter holders compliant with ISO 10473 and EN 12341. It interfaces seamlessly with widely adopted size-selective inlets—including PM_2.5 and PM₁₀ cyclones meeting U.S. EPA Designated Reference Methods and EU CEN/TS 14907 specifications. Instrument firmware implements mandatory data logging requirements outlined in China’s HJ 93-2013 (specifications for PM samplers), HJ 618-2011 (ambient air PM determination), and GB/T 15432-1995 (ambient air total suspended particulates). While not certified to IEC 61000-6-2/6-4 or ATEX, its electromagnetic compatibility and mechanical robustness meet typical Class II environmental rating requirements for outdoor monitoring stations.

Software & Data Management

Data export is supported via USB mass storage mode—no proprietary drivers required. Sample records are saved as CSV files containing calibrated flow values, ambient and bottle temperatures, barometric pressure, cumulative standard-volume (in m³), start/end timestamps, and user-assigned or auto-generated sample identifiers. The system maintains separate datasets per channel with audit-ready metadata, supporting retrospective validation under GLP-aligned quality assurance protocols. Optional Bluetooth thermal printing enables immediate hard-copy documentation of sampling parameters and completion logs—useful for chain-of-custody documentation during field audits. Firmware updates are delivered via signed binary packages to ensure traceability and prevent unauthorized modification.

Applications

• Regulatory ambient air quality monitoring networks (AAQMs) for PM_2.5/PM₁₀ compliance reporting per national and provincial environmental standards.
• Source apportionment studies requiring synchronized coarse/fine fraction collection for subsequent elemental carbon (EC), organic carbon (OC), and ion chromatography analysis.
• Indoor air quality assessments in occupational health settings where differential deposition modeling demands fractionated mass concentration data.
• Method validation and inter-laboratory comparison exercises conducted under CNAS-accredited environmental testing laboratories.
• Long-term trend analysis in ecological research stations where battery autonomy and thermal stability are essential for unattended operation.

FAQ

Does the TH-110H support automatic flow calibration verification?
No—the instrument does not include built-in calibrator gas or dynamic flow verification; periodic external calibration using a NIST-traceable primary standard (e.g., dry calibrator or bubble meter) is required per HJ 93-2013 Section 7.2.
Can the two channels operate at different flow rates simultaneously?
Yes—each channel is independently programmable, allowing asymmetric configurations such as 0.5 L/min for PM_2.5 and 0.3 L/min for PM₁₀, with full parameter isolation and separate data logging.
Is the internal battery replaceable by the end user?
The Li-ion battery pack is field-replaceable using standard Torx tools; replacement units are available through authorized Tianhong service centers with full capacity certification.
What happens if a sampling bottle is installed backward?
The patented reverse-flow protection design prevents backpressure damage to the pump and flow sensors—even if the inlet/outlet orientation is inverted during setup.
Does the device meet FDA 21 CFR Part 11 requirements for electronic records?
No—it lacks electronic signature capability, audit trail encryption, and role-based access control; it is intended for environmental monitoring—not pharmaceutical GMP environments.