Tianhong TH-880W Wireless Microcomputer Flue Gas and Particulate Parallel Sampler

Overview

The Tianhong TH-880W Wireless Microcomputer Flue Gas and Particulate Parallel Sampler is an integrated field instrument engineered for simultaneous, isokinetic sampling of particulate matter (PM) and gaseous pollutants from stationary emission sources. It operates on the principle of parallel sampling—two independent sampling trains operating under identical isokinetic conditions—to ensure high reproducibility and regulatory compliance in stack testing. Designed in strict accordance with Chinese national and environmental industry standards—including GB/T 16157–1996 (Method for Determination of Particulates and Gaseous Pollutants in Exhaust Gas from Stationary Sources), HJ/T 47–1999 (Technical Specifications for Flue Gas Samplers), and HJ/T 48–1999 (Technical Specifications for Dust Samplers)—the TH-880W supports both EPA Method 5–equivalent particulate collection and multi-component flue gas analysis. Its embedded ARM+CPLD dual-processor architecture enables real-time flow control, dynamic pressure compensation, and synchronized data acquisition across all measured parameters: stack temperature, static/dynamic pressure, flue gas velocity, moisture content, O₂, CO, SO₂, NO_x, and other regulated toxic gases.

Key Features

• Wireless remote operation via ARM9-based handheld terminal (Windows Mobile 6.5 or Android 2.2+ compatible), with line-of-sight control range up to 100 meters;
• V-cone flow sensor with wide turndown ratio (typically 10:1), low permanent pressure loss (<50 Pa), and ±1.0% FS accuracy for stable, traceable volumetric flow measurement;
• Multi-stage condensation-based moisture removal system (patented design) achieving ≥70% dew point suppression, minimizing filter clogging and extending diaphragm pump service life;
• Dual-core embedded control: ARM processor handles user interface, data logging, communications, and algorithmic calculations; CPLD manages time-critical tasks including motor PWM control, analog signal digitization, and hardware-level fault detection (e.g., motor stall, overcurrent, thermal shutdown);
• Modular bus architecture enabling hot-swappable sensor modules, simplified maintenance, and future-proof expansion for additional electrochemical gas channels (standard 4-channel, scalable to 8);
• Intelligent auto-identification of connected sensors—no manual calibration or range configuration required; each electrochemical cell is pre-characterized and digitally addressed;
• Integrated GPS module for automatic geotagging of sampling locations, supporting audit-ready field documentation and spatial data correlation;
• “One-Touch Sampling” function stores site-specific configurations (isokinetic ratios, probe positions, target flow rates) for rapid re-deployment at previously tested stacks;
• Compliance-grade data management: full audit trail, timestamped records, and optional encrypted cloud upload with TLS 1.2 transport encryption.

Sample Compatibility & Compliance

The TH-880W is validated for use across a broad spectrum of industrial combustion sources, including coal-fired boilers, biomass furnaces, cement kilns, waste incinerators, and metallurgical process stacks. It accommodates standard EPA/ISO-compliant sampling probes (e.g., Type S, Pitot tube, thermocouple assemblies) and supports both glass-fiber filter (GFF) and quartz filter media per GB/T 16157 requirements. All internal wet-bulb/dry-bulb humidity sensing, thermistor-based temperature measurement, and digital pressure transducers are factory-traceable to NIM (National Institute of Metrology, China) standards. The instrument meets Class B electromagnetic compatibility (EMC) per GB/T 17626 series and conforms to China’s Radio Management Regulations for ISM-band wireless transmission (433 MHz or 2.4 GHz, depending on regional certification). While not CE-marked or FDA-listed, its architecture aligns with functional safety principles referenced in IEC 61508 and data integrity expectations of GLP-aligned environmental laboratories.

Software & Data Management

Data acquisition and reporting are managed through a dual-tier software ecosystem: onboard firmware (RTOS-based) ensures deterministic real-time sampling control, while the companion PC application (Windows 7–11 compatible) provides post-processing, report generation, and regulatory export formats (CSV, PDF, XML). All stored measurements include full metadata: operator ID, GPS coordinates, ambient conditions, calibration logs, and sensor health status. Cloud synchronization—when enabled—uses HTTPS-based RESTful APIs with role-based access control and automatic versioning. Audit logs record every parameter modification, start/stop event, and sensor replacement, satisfying traceability requirements under China’s Environmental Monitoring Quality Assurance Technical Guidelines (HJ 630–2011). Exported datasets comply with national air quality monitoring database schemas and support direct import into provincial EIA reporting platforms.

Applications

• Regulatory compliance testing for particulate mass concentration (mg/m³ @ standard conditions) and gaseous pollutant emissions (e.g., SO₂, NO, CO) from fixed sources;
• Performance evaluation of air pollution control devices—including electrostatic precipitators (ESPs), fabric filters, scrubbers, and selective catalytic reduction (SCR) systems;
• Determination of combustion efficiency, excess air ratio (λ), and thermal loss via concurrent O₂, CO, and flue gas temperature profiling;
• Stack characterization for CEMS (Continuous Emission Monitoring Systems) validation and relative accuracy testing (RAT);
• Field studies supporting emission factor development, source apportionment modeling, and regional air dispersion simulations.

FAQ

Does the TH-880W support ISO 12141 or EN 13284-1 compliance?
The TH-880W is designed to meet the functional equivalency of ISO 12141 (dust sampling) and EN 13284-1 (low-range dust measurement) through its isokinetic control fidelity, flow stability, and certified sensor performance—but formal third-party certification to these European standards is not held.
Can the instrument operate unattended for extended periods?
Yes—the TH-880W supports scheduled autonomous sampling with programmable start/stop times, battery-backed clock, and watchdog-triggered recovery. Continuous operation exceeds 4 hours on DC power (optional external LiFePO₄ pack available).
Is firmware upgrade supported remotely?
Firmware updates require local USB connection to a Windows host; over-the-air (OTA) updates are not implemented due to regulatory constraints on field-modifiable measurement algorithms.
What gas sensors are factory-calibrated and certified?
Standard configurations include O₂, CO, SO₂, and NO sensors, each supplied with individual NIST-traceable calibration certificates and 12-month stability verification per Q/WTH 06–2013.
How is data integrity ensured during wireless transmission?
All wireless telemetry uses AES-128 encryption, cyclic redundancy check (CRC-32), and packet-level acknowledgment. Lost packets are automatically retransmitted; no measurement data is discarded during RF handshaking.