Tianhong TH-150C Intelligent Medium-Flow Total Suspended Particulates (TSP) Sampler

Overview

The Tianhong TH-150C Intelligent Medium-Flow Total Suspended Particulates (TSP) Sampler is a dual-channel environmental sampling instrument engineered for regulatory-grade monitoring of airborne particulate mass concentration and gaseous pollutants in ambient air. It operates on the principle of constant-flow volumetric sampling, utilizing a brushless DC motor-driven vacuum pump and closed-loop digital flow control to maintain stable aspiration across variable filter loading and atmospheric conditions. Designed in strict accordance with Chinese national environmental standards—including HJ/T 374–2007 (Technical Requirements and Test Methods for TSP Samplers), JJG 943–2011 (Verification Regulation for TSP Samplers), and enterprise standard Q/WTH 04–2013—the TH-150C delivers metrologically traceable performance for field-deployed compliance monitoring, source apportionment studies, and long-term air quality trend analysis. Its integrated architecture supports simultaneous or independent operation of one high-flow TSP channel (100 L/min) and two low-flow gas channels (0.1–1.0 L/min each), enabling coordinated collection of particulate and gaseous co-pollutants under identical meteorological conditions.

Key Features

• Intelligent constant-flow control: Real-time feedback loop adjusts pump speed within ≤8 seconds following abrupt changes in filter resistance or line voltage fluctuation—ensuring <±5% flow deviation over full operational range.
• Dual-mode sampling capability: Single-unit integration of medium-flow TSP sampling (100 L/min, ISO 7709-compliant inlet configuration) and dual-channel low-flow gas sampling (0.1–1.0 L/min per channel), eliminating need for separate instrumentation.
• Automated environmental compensation: Integrated barometric pressure sensor (range: 60–110 kPa, resolution: 0.1 kPa) enables real-time conversion between actual (working condition) and standard (273.15 K, 101.325 kPa) sampling volumes per GB/T 15439 and EPA Method 25.
• Multi-segment programmable timer: Supports up to six independent time intervals per sampling event; start/stop times, flow setpoints, and channel activation are individually configurable for each segment.
• Robust thermal and electrical protection: Built-in overcurrent, overtemperature, and power-loss retention circuits preserve calibration integrity and prevent data corruption during grid instability or battery backup transitions.
• Modular inlet compatibility: Accepts standardized PM₁₀, PM_2.5, PM₅, and PM₁ impactor assemblies (designed for 100 L/min nominal flow), facilitating sequential or parallel size-fractionated particulate collection without hardware modification.

Sample Compatibility & Compliance

The TH-150C accommodates 203 mm × 254 mm (8″ × 10″) glass fiber or quartz fiber filters for TSP gravimetric analysis, as specified in HJ 618–2011 and ISO 7205. For gaseous sampling, it interfaces with standard 10–100 mL impingers, silica gel cartridges, and diffusion scrubbers compliant with HJ 533–2009 (NH₃), HJ 534–2009 (HCl), and HJ 547–2017 (Cl₂). All firmware logic, data logging timestamps, and calibration records adhere to GLP principles, with non-volatile memory ensuring audit-ready storage of ≥10,000 sampling events—including pre/post-weighing metadata, barometric corrections, and flow validation logs. The device meets electromagnetic compatibility requirements per GB/T 18268.1–2010 (IEC 61326-1) and safety specifications per GB 4793.1–2007 (IEC 61010-1).

Software & Data Management

Data export is supported via USB 2.0 interface using Tianhong’s proprietary TH-DataLink v3.2 desktop application (Windows 10/11 compatible). The software provides automated calculation of standard-volume-corrected mass concentrations (µg/m³), statistical summaries (mean, SD, CV%), and QA/QC flagging for out-of-tolerance flow excursions. Raw datasets include ISO 8601-formatted timestamps, instantaneous flow readings (Hz-sampled), temperature-compensated pressure values, and battery voltage history. Export formats include CSV (for Excel and R integration) and XML (compatible with national air quality data platforms such as CNEMC’s AQMS). Firmware updates preserve historical calibration coefficients and user-defined method templates, ensuring continuity across regulatory reporting cycles.

Applications

• Ambient air quality monitoring networks requiring simultaneous TSP and SO₂/NO_x/VOCs sampling per China’s “Environmental Air Quality Standards” (GB 3095–2012).
• Industrial stack emission characterization where particulate and gaseous co-emission profiles must be resolved at matched temporal resolution.
• Indoor air quality assessments in occupational settings (e.g., construction sites, foundries) under GBZ 159–2004 workplace sampling protocols.
• Research-grade field campaigns evaluating aerosol–gas interaction dynamics, including secondary organic aerosol (SOA) formation potential.
• Calibration verification of continuous ambient monitors (e.g., beta attenuation monitors, TEOM systems) using reference gravimetric methods.

FAQ

Does the TH-150C support remote telemetry or GPRS data transmission?
No—this model relies on local USB data retrieval and manual field deployment; optional GPRS-enabled variants (TH-150C-G) are available under separate part numbers.
What is the recommended maintenance interval for the flow sensor and pump assembly?
Annual recalibration against NIST-traceable primary standards is advised; pump brushes require replacement after 6,000 hours of cumulative runtime at rated load.
Can the instrument operate continuously for 24 hours at maximum flow and backpressure?
Yes—rated for uninterrupted 10-hour operation at 100 L/min against 30 kPa resistance; extended runs require periodic cooling pauses to maintain thermal stability of the motor driver.
Is the internal barometric sensor factory-calibrated and field-adjustable?
Yes—sensor is calibrated at three pressure points (70, 90, 105 kPa) prior to shipment; users may perform zero-offset correction using certified reference manometers via service menu.
Are digital audit trails and electronic signatures compliant with FDA 21 CFR Part 11?
Not natively—data files lack cryptographic signing or role-based access control; however, exported CSV logs may be ingested into validated LIMS platforms meeting Part 11 requirements.