Tianhong TH-150FD Intelligent Medium-Flow Total Suspended Particulate (TSP) Sampler

Overview

The Tianhong TH-150FD Intelligent Medium-Flow Total Suspended Particulate (TSP) Sampler is an EPA-aligned ambient air monitoring instrument engineered for regulatory-grade collection of airborne particulate matter and co-sampled gaseous pollutants. It operates on the principle of isokinetic, volumetric sampling using precision-controlled suction through standardized filter media—enabling gravimetric analysis per GB/T 15432–1995 and supporting parallel determination of SO₂, NOₓ, and other trace gases via dual gaseous channels. Unlike legacy rotor-based systems, the TH-150FD replaces mechanical flow indication with a thermally compensated electronic mass flow meter, delivering real-time closed-loop feedback to maintain constant volumetric flow across variable backpressure conditions—including those induced by progressive filter loading or high-altitude operation. Its triple-channel architecture separates gaseous and particulate sampling paths physically and functionally, minimizing cross-contamination risk while enabling synchronized multi-parameter data acquisition in compliance with Chinese national environmental monitoring protocols.

Key Features

• Triple independent sampling channels: two dedicated gaseous streams (for SO₂, NOₓ, ozone, or VOCs) and one particulate channel configurable for TSP, PM₁₀, or PM₂.₅ using certified impactor or cyclone cut-points.
• Closed-loop electronic flow control system with automatic pressure compensation—maintains setpoint accuracy within ±2% of reading across dynamic resistance loads up to 25 kPa.
• Imported brushless DC sampling pump offering >20,000-hour MTBF, low acoustic emission (<45 dB(A)), and stable performance from −30 °C to +50 °C.
• Wide-temperature OLED display with intuitive icon-driven UI—fully backward-compatible with TH-150 operational logic to minimize user retraining.
• Integrated atmospheric pressure sensor (50–110 kPa range) enables automatic standard-condition volume correction (at 273.15 K, 101.325 kPa) without external calibration.
• Non-volatile memory retains all sampling logs, flow profiles, error codes, and timestamped event records—even during unexpected power loss.
• Optional Bluetooth thermal printer supports one-to-many pairing; prints audit-ready reports including date/time, flow rate, cumulative volume (actual & standard), battery status, and filter ID.

Sample Compatibility & Compliance

The TH-150FD is validated for use with 47-mm and 90-mm quartz fiber, PTFE, or cellulose ester filters compliant with ISO 10473 and EN 12341. Its particulate inlet meets the geometric and aerodynamic specifications defined in HJ/T 374–2007 for TSP samplers and supports optional PM₁₀/PM₂.₅ fractionation via interchangeable, NIST-traceable impactors. All firmware and data handling routines adhere to GLP principles: each sampling event generates a unique digital log with immutable timestamps, operator ID (if enabled), and hardware checksums. The instrument satisfies metrological traceability requirements under JJG 943–2011 and JJG 956–2013, and its measurement uncertainty budget has been independently verified against reference calibrators accredited to ISO/IEC 17025.

Software & Data Management

Firmware v3.2+ includes embedded data management tools supporting CSV export via USB host interface and secure over-the-air updates. Raw flow, pressure, temperature, and runtime data are stored at 1-second resolution with CRC-32 integrity checking. Exported datasets include column headers conforming to WMO GAW metadata conventions (e.g., “Sampling_Start_UTC”, “Std_Volume_m3”, “Ambient_Pressure_kPa”). Audit trails record all configuration changes, calibration events, and fault resets—retained for ≥12 months unless manually purged. No cloud dependency: local storage ensures full data sovereignty and alignment with China’s Cybersecurity Law and environmental data governance mandates.

Applications

• Fixed-site ambient air quality monitoring networks conducting routine TSP, PM₁₀, and PM₂.₅ surveillance per China’s Ambient Air Quality Standards (GB 3095–2012).
• Mobile source emission studies requiring simultaneous capture of exhaust-derived particulates and associated gaseous co-pollutants.
• Indoor air quality assessments in occupational health settings where respirable dust fractions must be quantified alongside SO₂ exposure thresholds.
• Method validation laboratories performing inter-laboratory comparisons under CNAS accreditation (ISO/IEC 17025).
• High-altitude field campaigns (e.g., Tibetan Plateau, Qinghai–Tibet Railway monitoring stations) leveraging its extended pressure and thermal operating envelope.

FAQ

Does the TH-150FD support remote monitoring or network connectivity?
No built-in Ethernet or cellular module is provided; however, USB-host and Bluetooth interfaces allow integration with external data loggers or field tablets running custom middleware.
Can the instrument be used for PM₂.₅ sampling without modification?
Yes—when equipped with a certified PM₂.₅ impactor meeting HJ 653–2013 specifications, the particulate channel achieves aerodynamic cutoff at 2.5 µm ±0.2 µm with sharpness σg ≤ 1.2.
What is the calibration interval recommendation?
Annual verification against a NIST-traceable primary flow standard is required per JJG 956–2013; field checks using a secondary rotameter or bubble meter should be performed before each sampling campaign.
Is the internal battery replaceable by the end user?
The Li-ion backup pack is serviceable only by authorized Tianhong technicians due to UN 38.3 transport safety certification requirements and embedded BMS calibration dependencies.
How does the auto-compensation algorithm respond to filter clogging?
The flow controller continuously measures actual flow vs. setpoint and adjusts pump voltage in real time to counteract increasing ΔP—maintaining volumetric accuracy until the preset maximum allowable backpressure (25 kPa) is reached, at which point an audible alarm triggers and sampling pauses.