Tianhong TH-110E Portable Dual-Channel Ambient Air Sampler

Overview

The Tianhong TH-110E Portable Dual-Channel Ambient Air Sampler is an intelligent, microprocessor-driven constant-flow sampling instrument engineered for regulatory-grade field collection of ambient and workplace air. It operates on the principle of precision-controlled volumetric aspiration using dual independent diaphragm pumps—each calibrated to maintain stable flow rates under variable backpressure conditions typical of sorbent tube, filter, and impinger-based sampling protocols. Designed in strict accordance with Chinese environmental monitoring standards—including HJ/T 375–2007 (Technical Requirements for Ambient Air Samplers), JJG 956–2013 (Verification Regulation for Atmospheric Samplers), GB/T 17061–1997 (Sampling Instruments for Workplace Air), and HJ 644–2013 (VOCs Analysis via Sorbent Tube Sampling–Thermal Desorption–GC/MS)—the TH-110E supports trace-level air quality assessment across diverse operational contexts. Its embedded environmental sensors continuously monitor and compensate for ambient temperature and barometric pressure, enabling real-time conversion of sampled volume from actual to standard conditions (0 °C, 101.325 kPa), a requirement for compliance with ISO 16000-2, EPA TO-17, and EU EN 13670-1 reporting frameworks.

Key Features

• Dual-channel architecture with two imported diaphragm pumps, enabling simultaneous or independent sampling of two gaseous analytes without cross-interference
• Microcontroller-based constant-flow regulation with adaptive feedback loop, ensuring flow stability across variable filter loading and sorbent resistance
• Integrated digital barometer and thermistor for automatic environmental correction during volume calculation
• Full Chinese-language LCD interface with intuitive menu navigation, supporting real-time display of flow rate, elapsed time, accumulated volume (both actual and standard), battery status, and error codes
• Flexible sampling logic: programmable modes include fixed duration, fixed actual volume, fixed standard volume, and conditional start/stop triggers
• Onboard non-volatile memory stores complete session logs—including timestamps, pump-specific flow data, environmental parameters, and calibration history—for audit-ready traceability
• Software-based calibration capability for zero-point and span adjustment of pressure and flow transducers, eliminating need for external hardware calibrators during routine maintenance
• Lightweight, ruggedized housing optimized for field portability; compatible with tripod mounting and belt-clip accessories
• Rechargeable DC battery system rated for ≥20 hours of continuous dual-channel operation at nominal flow settings

Sample Compatibility & Compliance

The TH-110E is validated for use with standardized passive and active air sampling media, including but not limited to: Tenax TA, Carbopack X, and Silica Gel sorbent tubes (per HJ 644–2013); quartz fiber and PTFE membrane filters for PM₁₀/PM_2.5 particulate collection; and impingers containing absorbing solutions for formaldehyde, SO₂, or NO_x. Its dual-path design allows co-sampling of complementary analyte classes—for instance, VOCs and carbonyls—in a single deployment, reducing logistical overhead in multi-parameter surveys. All firmware and data handling routines conform to GLP-aligned principles: timestamped records are immutable once written, and no data export mechanism permits post-acquisition editing. While not FDA 21 CFR Part 11-certified out-of-the-box, its logging architecture supports integration into validated LIMS environments where electronic signatures and audit trails are externally managed.

Software & Data Management

Data retrieval is accomplished via USB interface using Tianhong’s proprietary PC utility, which parses binary session files into CSV and PDF report formats. Each record contains pump identifier, start/stop times, mean flow rate per channel, integrated actual and standard volumes, mean ambient temperature and pressure, and battery voltage profile. The software enforces hierarchical user access (Operator, Technician, Administrator) and retains full edit history of calibration events. Exported datasets include metadata fields compliant with MIQE-inspired minimum information checklists for environmental exposure studies. Firmware updates are delivered as signed binaries to prevent unauthorized modification; version control is embedded in all logged records.

Applications

• Regulatory ambient air monitoring networks requiring dual-analyte synchronization (e.g., BTEX + ozone precursors)
• Occupational hygiene assessments in manufacturing, mining, and chemical processing facilities per GBZ 159–2004
• Indoor air quality investigations in schools, hospitals, and residential buildings
• Method validation and proficiency testing in CNAS-accredited third-party laboratories
• Mobile source emission characterization during roadside or tunnel sampling campaigns
• Research-grade atmospheric chemistry field studies requiring synchronized multi-media sampling

FAQ

What sampling standards does the TH-110E directly support?

It is fully aligned with HJ/T 375–2007, JJG 956–2013, GB/T 17061–1997, and HJ 644–2013, and its volume correction algorithms satisfy ISO 16000-2 and EPA Compendium Method TO-17 requirements.
Can the TH-110E operate unattended overnight?

Yes—its 20+ hour battery life and robust sleep/wake cycle management enable extended autonomous deployments; optional solar charging kits are available for remote sites.
Is firmware update capability included?

Yes, field-upgradable firmware is provided through Tianhong’s secure download portal, with version verification and rollback support built into the bootloader.
Does the device store calibration certificates internally?

No—the TH-110E logs calibration events (date, technician ID, pre/post values) but requires external archiving of NIST-traceable certificate documents per GLP documentation practices.
How is data integrity ensured during power loss?

All critical sampling parameters are written to flash memory at 1-second intervals; power-fail detection triggers immediate cache flush, preserving up to 72 hours of buffered data.