Tianhong TH-892 Flue Gas Parameter Analyzer

Overview

The Tianhong TH-892 Flue Gas Parameter Analyzer is a portable, field-deployable instrument engineered for in-situ measurement and calculation of critical flue gas physical parameters in industrial stack emissions monitoring. It operates on fundamental principles of pitot-static pressure differential measurement, thermistor-based temperature sensing, and capacitive humidity detection—enabling real-time derivation of flue gas velocity, actual (wet) volumetric flow rate, and dry standard volumetric flow rate (at 273.15 K and 101.325 kPa). Designed specifically for compliance with Chinese national standard GB/T 16157–1996 (“Determination of Particulate Matter and Gaseous Pollutants in Exhaust Gas from Stationary Sources”), the TH-892 supports pre-sampling characterization required for subsequent particulate mass concentration analysis and gaseous pollutant quantification (e.g., SO₂, NOₓ via companion infrared analyzers such as the TH-890C series). Its compact mechanical architecture and integrated sensor suite allow rapid deployment at sampling ports across diverse stack geometries, including rectangular ducts, circular stacks, and bypass lines.

Key Features

• Integrated multi-parameter sensing: Simultaneous acquisition of dynamic pressure (±2000 Pa range), static pressure (±10 kPa), flue gas temperature (0–200 °C), and relative humidity (10–95 %RH, non-condensing).
• Onboard flow calculation engine: Complies with ISO 10780 and GB/T 16157–1996 algorithms to compute flue gas velocity (m/s), actual volumetric flow rate (m³/h), and dry standard volumetric flow rate (Nm³/h) using real-time temperature, pressure, and moisture correction.
• 4.3-inch high-contrast color touchscreen interface: Full Chinese-language menu navigation with intuitive icon-driven workflow—optimized for field technicians operating under variable lighting and PPE constraints.
• Embedded thermal printer: Enables immediate hard-copy documentation of measurement sessions, including timestamp, location ID, operator input, and calculated parameters—supporting traceability in environmental inspection reports.
• Rechargeable 8.4 V lithium-ion battery system: Provides ≥6 hours of continuous operation under typical field conditions; includes low-voltage warning and automatic shutdown to preserve data integrity.
• Robust data management: Local storage of up to 500 complete measurement records with automatic time/date stamping, user-defined site tags, and 1-minute moving average generation for pressure and temperature trends.

Sample Compatibility & Compliance

The TH-892 is validated for use in exhaust ducts and stacks conveying combustion gases from coal-fired boilers, biomass furnaces, cement kilns, and waste incinerators. It accommodates flue gas temperatures up to 200 °C and particulate loadings consistent with Class C sampling environments per GB/T 16157–1996. While not a certified emissions monitor (CEM) per EPA Performance Specification 2 or EN 15267, the instrument fulfills Method 1 (EPA) and Annex B (EN 13284-1) requirements for velocity and flow profile determination prior to isokinetic sampling train deployment. Its design aligns with GLP-aligned field data collection practices, supporting audit-ready documentation when paired with laboratory-based gravimetric or spectroscopic analysis.

Software & Data Management

Data export is supported via USB interface (no proprietary software required); recorded files are stored in CSV format compatible with Excel, MATLAB, and LIMS platforms. Each record contains raw sensor outputs (mV equivalents), compensated values, intermediate calculations (e.g., absolute pressure, water vapor partial pressure), and final derived parameters. The firmware implements write-once logging to prevent post-acquisition modification, satisfying basic data integrity expectations under CNAS-CL01:2018 and internal QA protocols. Though not FDA 21 CFR Part 11 compliant (lacking electronic signature and audit trail modules), its printed output and timestamped digital logs meet minimum regulatory documentation standards for environmental compliance verification in China’s provincial ecological environment bureaus.

Applications

• Pre-sampling site survey for isokinetic particulate sampling per GB/T 16157–1996 Section 5.2.
• Stack velocity profiling to identify representative sampling points in heterogeneous flow fields.
• Annual stack testing programs mandated under China’s “Emission Permit System” (Ministry of Ecology and Environment Order No. 11).
• Commissioning and performance verification of flue gas desulfurization (FGD) and selective catalytic reduction (SCR) systems.
• Educational use in environmental engineering laboratories for teaching flue gas physics and emission inventory methodology.

FAQ

Does the TH-892 measure gaseous pollutants such as SO₂ or NO?
No. The TH-892 is a physical parameter analyzer only. It does not include gas sensors. For gaseous pollutant analysis, it is intended for use alongside dedicated analyzers such as the TH-890C infrared gas analyzer.
Can the instrument be calibrated in the field?
Yes. Pressure transducers support two-point zero/span adjustment using certified dead-weight testers or digital manometers traceable to NIM (National Institute of Metrology, China). Temperature calibration requires external reference thermometers meeting JJG 229–2010.
Is the battery replaceable by the end user?
The 8.4 V Li-ion pack is field-replaceable using standard Torx tools; replacement units are available through authorized Tianhong service centers with full CE/ROHS documentation.
What is the maximum allowable flue gas moisture content for reliable operation?
The humidity sensor is rated for non-condensing environments up to 95 %RH. Condensation must be prevented upstream via heated probe housings or sample line insulation to avoid drift or sensor damage.
Does the device support Bluetooth or Wi-Fi connectivity?
No. The TH-892 relies solely on USB 2.0 for data transfer to ensure electromagnetic compatibility in high-noise industrial settings and eliminate cybersecurity risks associated with wireless protocols.