Tianhong TH-110H AC/DC Dual-Channel Ambient Air Sampler

Overview

The Tianhong TH-110H AC/DC Dual-Channel Ambient Air Sampler is a field-deployable, microprocessor-controlled instrument engineered for quantitative collection of ambient air samples in compliance with Chinese environmental monitoring standards. It operates on the principle of controlled volumetric aspiration using a precision mass flow meter to regulate and maintain constant sampling flow under variable inlet resistance—critical for accurate determination of airborne pollutant concentrations (e.g., PM₁₀, PM_2.5, VOCs, SO₂, NO_x) when paired with appropriate sorbent tubes or filter media. Designed for regulatory-grade field use, the TH-110H supports both simultaneous and independent dual-channel sampling, enabling parallel collection for method validation, duplicate analysis, or multi-analyte workflows. Its integrated environmental sensors continuously record barometric pressure and ambient temperature to enable real-time standard-condition volume correction (at 273.15 K and 101.325 kPa), ensuring metrological traceability in accordance with HJ/T 375–2007 and JJG 956–2013.

Key Features

• Precision mass flow measurement and closed-loop control ensures stable flow delivery across the full 0.1–1.0 L/min range, with ≤±5% deviation under specified backpressure conditions.
• Dual independent sampling channels—each with dedicated flow control, real-time display, and timestamped data logging—support method redundancy, comparative studies, or differential sampling protocols.
• High-efficiency brushless diaphragm pump delivers >30 kPa maximum vacuum pressure while maintaining low acoustic emission (60,000 minutes cumulative runtime at rated load).
• 4.3-inch high-brightness capacitive touchscreen interface provides intuitive navigation, parameter configuration, live status monitoring, and error diagnostics without physical buttons.
• Integrated environmental sensing module automatically measures and logs atmospheric pressure (range: 50–110 kPa) and ambient temperature (–10 to 50 °C), enabling automatic standard-volume calculation per HJ/T 375–2007 Annex A.
• Intelligent thermal management system maintains sample bottle temperature at ≥20 °C via PTC heating element—preventing condensation and analyte loss during low-temperature deployments.
• Rechargeable lithium-ion battery pack enables ≥10 hours of continuous operation at maximum flow and system backpressure, eliminating dependency on grid power in remote or mobile monitoring scenarios.

Sample Compatibility & Compliance

The TH-110H is compatible with standard 47-mm filter cassettes, quartz fiber filters, polyurethane foam (PUF) plugs, and glass wool-packed sorbent tubes used in EPA TO-17, HJ 644–2013, and HJ 956–2018 methodologies. Its dual-channel architecture permits co-sampling of particulate and gaseous phases using matched or divergent media configurations. The instrument conforms to mandatory technical requirements outlined in HJ/T 375–2007 (Technical Specifications for Ambient Air Samplers) and metrological verification procedures defined in JJG 956–2013 (Verification Regulation for Atmospheric Samplers). While not certified to ISO/IEC 17025 or ANSI Z24.1, its documented flow accuracy, thermal stability, and environmental compensation align with GLP-aligned field data acquisition practices for environmental laboratories conducting routine ambient air quality monitoring.

Software & Data Management

All operational parameters—including setpoint flow, actual flow, elapsed time, accumulated standard-volume, pressure, temperature, and heater status—are stored internally with UTC timestamps. Each channel maintains ≥200 independent sampling records, accessible via on-device menu navigation or exported via USB interface to external storage. Data export follows plain-text CSV format with column headers compliant with national environmental data reporting templates (e.g., CNEMC formats). Optional Bluetooth 4.2 wireless printing support enables direct thermal receipt generation for field logbooks—no proprietary drivers required. Firmware updates are performed via microSD card; version history and calibration logs are retained in non-volatile memory for audit readiness.

Applications

• Routine ambient air quality monitoring by municipal and provincial EPBs (Environmental Protection Bureaus) in urban, suburban, and background sites.
• Source-oriented sampling near industrial facilities, traffic corridors, construction zones, and waste treatment plants per HJ 212–2017 data transmission protocols.
• Method validation and inter-laboratory comparison studies requiring synchronized dual-channel collection.
• Indoor air quality assessments in schools, hospitals, and office buildings where battery-powered portability and quiet operation are essential.
• Short-term intensive campaigns (e.g., ozone episode monitoring, dust storm tracking) leveraging extended battery runtime and robust thermal stabilization.

FAQ

Does the TH-110H support flow calibration traceable to national standards?
Yes—flow sensor calibration is performed against a NIST-traceable primary standard (dry calibrator) prior to shipment, and calibration certificates referencing JJG 956–2013 procedures are available upon request.
Can the instrument operate while charging?
Yes—the internal battery charges concurrently with AC power input, and sampling continues uninterrupted during charging.
Is firmware upgrade capability available in the field?
Yes—users may install firmware updates independently using a formatted microSD card containing validated .bin files provided by Tianhong Technical Support.
What is the recommended maintenance interval for the pump and flow sensor?
Pump inspection and filter replacement are advised every 6 months or after 3,000 operating hours; mass flow sensor zero-checking should be performed before each sampling campaign using clean, dry air.
Are digital I/O or Modbus interfaces supported for integration into SCADA systems?
No—the TH-110H does not feature industrial communication protocols; it is designed as a standalone, operator-centric field sampler with local data integrity as the primary design objective.