Tianhong TH-230 Portable Moisture-in-Gas Analyzer
| Brand | Tianhong |
|---|---|
| Origin | Hubei, China |
| Model | TH-230 |
| Measurement Principle | Capacitive-Resistive (Capacitance & Resistance Hybrid) Sensor Technology |
| Display | 7-inch capacitive touchscreen with hex-grid real-time data layout |
| Data Storage | Internal non-volatile memory (≥10,000 records) |
| Operating Temperature Range | -20 °C to +60 °C |
| Protection Rating | IP54 |
| Power Supply | Rechargeable Li-ion battery (≥8 h continuous operation) |
| Gas Compatibility | Flue gas, stack emissions, ambient air, industrial process streams |
| Compliance | Meets GB/T 16157–1996, HJ/T 397–2007, and ISO 12141:2021 (Humidity measurement in hot, wet, and dusty gas streams) |
Overview
The Tianhong TH-230 Portable Moisture-in-Gas Analyzer is an engineered solution for field-deployable, real-time quantification of moisture content (expressed as volume % H₂O or dew point) in high-temperature, high-humidity, and particulate-laden gas streams. It operates on a dual-sensing principle—capacitive-resistive (CR) hybrid transduction—wherein a proprietary polymer-based dielectric sensor measures relative humidity while a temperature-compensated resistive element corrects for thermal drift and condensation-induced signal hysteresis. This architecture enables stable performance across rapid thermal transients typical of flue gas sampling at boiler stacks, waste incinerators, cement kilns, and biomass combustion units. Unlike optical hygrometers vulnerable to optical fouling or chilled-mirror systems requiring frequent calibration, the TH-230’s solid-state sensing core delivers consistent repeatability (<±0.3% vol H₂O) under variable dust loading up to 500 mg/m³, making it suitable for unattended short-term surveys and regulatory compliance verification per Chinese emission standards and internationally aligned methodologies.
Key Features
- Hex-grid real-time display interface: Simultaneously renders moisture concentration (% vol), stack temperature, static pressure, ambient RH, barometric pressure, and elapsed measurement time—each parameter updated at 1 Hz with timestamped logging.
- Robust mechanical design: Aluminum-magnesium alloy housing (1.2 kg net weight), IP54-rated ingress protection, and shock-absorbing silicone bumper ensure operational integrity during transport and field deployment on ladders, scaffolds, or mobile platforms.
- Intelligent thermal compensation: Onboard Pt100 RTD and microprocessor-driven algorithm dynamically corrects sensor output across –20 °C to +60 °C ambient range, eliminating manual correction tables required by legacy analog instruments.
- Touchscreen-driven workflow: 7-inch capacitive display supports gesture navigation, user-defined measurement templates, and one-touch export via USB-C to CSV or PDF reports compliant with GLP documentation requirements.
- Battery-operated autonomy: Integrated 12,000 mAh Li-ion pack sustains ≥8 hours of continuous sampling at 2 Hz acquisition rate; battery health and remaining runtime displayed in real time with low-power warning thresholds.
- Maintenance-minimized architecture: No consumables, no purge gases, no optical windows—sensor module rated for ≥24 months service life under typical flue gas exposure (SO₂ < 2000 ppm, NOₓ < 500 ppm, O₂ < 15%).
Sample Compatibility & Compliance
The TH-230 is validated for direct insertion into ducts and stacks with gas velocities from 2 to 30 m/s and temperatures up to 180 °C (with optional high-temp probe extension). It meets the metrological requirements of GB/T 16157–1996 (“Determination of particulate matter and gaseous pollutants in exhaust gas from stationary sources”) and HJ/T 397–2007 (“Technical specification for sampling of exhaust gas from stationary sources”). Its CR sensor response profile aligns with ISO 12141:2021 for humidity measurement in hot, wet, and dirty industrial gases. While not certified to IECEx or ATEX, its intrinsically safe design (SELV circuitry, <30 Vdc operating voltage) permits use in non-classified zones adjacent to hazardous areas. Calibration traceability is maintained through NIM (National Institute of Metrology, China)-certified reference gas mixtures, and factory calibration certificates include uncertainty budgets per ISO/IEC 17025:2017.
Software & Data Management
Data acquisition and reporting are managed via Tianhong’s proprietary TH-Link Desktop Suite (Windows 10/11 compatible), which supports audit-trail-enabled configuration, firmware updates, and batch report generation. All stored measurements include embedded metadata: GPS coordinates (via paired Bluetooth GNSS receiver), operator ID, instrument serial number, calibration due date, and environmental context tags. Export formats include ANSI-compliant CSV (UTF-8 encoded), XML for LIMS integration, and print-ready PDFs with digital signature fields for QA sign-off. The software enforces 21 CFR Part 11–compliant user access control (role-based permissions), electronic signatures, and immutable audit logs—fully supporting GMP/GLP-regulated environments where data integrity is subject to regulatory review.
Applications
- Regulatory stack testing: Routine moisture monitoring during EPA Method 4 or HJ 75–2017 CEMS validation protocols.
- Combustion efficiency optimization: Correlating H₂O % with excess air ratio and CO/CO₂ balance in boiler tuning.
- Waste-to-energy plant operations: Tracking moisture fluctuations pre- and post-scrubber to assess desulfurization efficiency.
- Research-grade field campaigns: Long-term ambient air humidity profiling in coastal, industrial, or agricultural boundary layer studies.
- Pre-commissioning verification: Confirming dryer outlet moisture levels prior to baghouse or electrostatic precipitator startup.
FAQ
What is the recommended calibration interval?
Annual calibration is advised under normal field use; semi-annual calibration is recommended when deployed in high-sulfur or high-chloride flue gas environments.
Can the TH-230 measure dew point directly?
Yes—the instrument calculates and displays dew point (°C) in real time using the Magnus formula with iterative saturation vapor pressure correction based on measured %H₂O and static pressure.
Is external power required during field operation?
No—fully battery-powered operation is standard; AC adapter is provided only for charging and lab-based benchtop use.
Does the device support wireless data transmission?
Not natively; however, optional Bluetooth 5.0 module (TH-BT20) enables secure pairing with Android/iOS tablets for remote viewing and geotagged logging.
How is sensor contamination mitigated during extended stack insertion?
The probe tip incorporates a passive sintered metal filter (5 µm pore size) and hydrophobic membrane that repels liquid droplets while permitting vapor diffusion—no active purge or heating required.
