TOPWAY TW-2200C Intelligent 24-Hour / Total Suspended Particulates (TSP) Integrated Air Sampler

Overview

The TOPWAY TW-2200C Intelligent 24-Hour / Total Suspended Particulates (TSP) Integrated Air Sampler is a dual-mode environmental monitoring instrument engineered for simultaneous or independent collection of gaseous pollutants and airborne particulate matter in ambient, indoor, and occupational environments. It operates on two complementary sampling principles: solution absorption for reactive and volatile gases (e.g., SO₂, NOₓ, NH₃, formaldehyde), and gravimetric filtration for total suspended particulates (TSP), respirable PM₁₀, and fine PM₂.₅ fractions. Designed to meet rigorous regulatory measurement requirements, the TW-2200C integrates high-stability mass flow control, real-time environmental parameter logging, and robust field-deployable architecture—making it suitable for long-term unattended operation in fixed-site monitoring stations, mobile laboratory platforms, and remote field campaigns across municipal, industrial, academic, and research settings.

Key Features

• Dual independent sampling channels: Two programmable atmospheric gas sampling paths (0.1–1.2 L/min) and one dedicated particulate channel (10–130 L/min), each with individual start/stop control and real-time flow feedback.
• Microprocessor-driven flow regulation: Embedded high-speed controller continuously compensates for dynamic pressure drops, voltage fluctuations, and filter loading effects—ensuring stable volumetric flow within ±2.5% accuracy across full operational range.
• Anti-backflow protection: Integrated desiccant drying bottle on gas sampling train prevents absorption solution back-siphoning during pump shutdown or pressure transients.
• Intelligent timing system: Built-in real-time clock supports delayed startup, multi-cycle timed sampling (1–99 intervals), and user-defined interval duration—all configurable via intuitive Chinese-language LCD interface with auto-contrast adjustment for low-light and sub-zero conditions (−30 °C operational capability).
• High-reliability particulate drive: Brushless DC motor delivers consistent torque under high-resistance filter loads, enabling uninterrupted 24-hour continuous TSP/PM sampling without thermal degradation or commutation wear.
• Electrostatically inert sampling head: Precision-machined aluminum alloy TSP/PM₁₀/PM₂.₅ impactor assemblies minimize particle adhesion and electrostatic retention—critical for accurate gravimetric recovery and low blank variability.
• Fault-tolerant power management: Automatic resume-on-power-restoration functionality preserves scheduled sampling sequences after unexpected AC interruption; optional external DC input (via TW-DY series portable battery packs) extends deployment flexibility in off-grid locations.

Sample Compatibility & Compliance

The TW-2200C is validated for use with standard EPA/ISO-compatible absorbent solutions (e.g., potassium hydroxide for SO₂, sodium arsenite for ozone) and certified glass fiber or quartz filters (e.g., Whatman GF/F, Pallflex Tissuquartz) for particulate mass determination. Its design conforms to national metrological verification protocols and method-specific performance criteria outlined in JJG 956–2013 (Calibration Procedure for Atmospheric Samplers), HJ 618–2011 (Gravimetric Determination of PM₁₀ and PM₂.₅ in Ambient Air), and HJ 93–2013 (Technical Requirements and Test Methods for PM₁₀/PM₂.₅ Samplers). While not certified for ISO 17025-accredited laboratories out-of-the-box, its traceable flow calibration, audit-ready time stamping, and RS232 data export support integration into GLP-compliant workflows when paired with validated SOPs and periodic third-party verification.

Software & Data Management

Data acquisition and configuration are managed locally via the integrated 128×64 pixel monochrome LCD with tactile membrane keypad. All sampling parameters—including start time, flow setpoints, cycle count, and elapsed runtime—are stored in non-volatile memory with timestamped event logging. The RS232 serial interface enables direct connection to external thermal printers (e.g., EPSON TM-T20II) for hard-copy record generation or integration with PC-based data aggregation software using ASCII protocol. No proprietary cloud platform or firmware-based analytics are embedded; instead, raw time-series flow, pressure, temperature, and runtime logs are structured for post-processing in Excel, MATLAB, or environmental data management systems compliant with EPA Air Quality System (AQS) metadata conventions.

Applications

• Ambient air quality monitoring networks (urban, rural, roadside)
• Indoor air quality assessment in schools, hospitals, and office buildings
• Occupational exposure evaluation per OSHA/NIOSH sampling guidelines
• Source emission characterization at industrial stacks and construction sites
• Method validation and inter-laboratory comparison studies
• Long-term trend analysis of PM mass concentration and gaseous pollutant co-occurrence
• Field calibration and verification of low-cost sensor networks

FAQ

Does the TW-2200C support simultaneous gas and particulate sampling?
Yes—the instrument features three physically isolated sampling paths: two for gaseous analytes and one for particulate matter—each independently controllable for concurrent or staggered operation.
What filter types are recommended for TSP and PM₂.₅ collection?
For TSP, 47-mm or 8-inch glass fiber filters (e.g., Pallflex E70-2075) are standard; for PM₂.₅, use quartz fiber filters with low organic carbon blank (e.g., Pallflex Tissuquartz QAT-UP) following HJ 618–2011 pre-conditioning protocols.
Is the flow calibration traceable to national standards?
The built-in electronic flowmeter is factory-calibrated against a NIST-traceable primary standard; users are advised to perform annual verification using a calibrated dry gas meter or bubble flowmeter per JJG 956–2013 Annex B.
Can the device operate in extreme cold or high-humidity environments?
Yes—the LCD and internal electronics function reliably from −30 °C to +50 °C; however, condensation in the gas sampling line must be mitigated via inline Peltier coolers or Nafion dryers when sampling saturated air above 90% RH.
Is RS232 output compatible with modern data loggers or SCADA systems?
Yes—ASCII-formatted output includes flow rate, elapsed time, battery voltage, and error flags; custom parsing scripts or Modbus-to-RS232 gateways enable integration with industrial telemetry infrastructure.