HUANKONG GHK-1300Q Environmental Air Particulate Matter Sampler

Overview

The HUANKONG GHK-1300Q Environmental Air Particulate Matter Sampler is a precision-engineered, microprocessor-controlled integrated ambient air sampling system designed for regulatory-grade collection of total suspended particulates (TSP), PM₁₀, PM_2.5, and co-located gaseous or semi-volatile analytes—including fluorides, heavy metals (e.g., Pb per GB/T 15264–94), iodine-131 (per GB/T 14584–93), polycyclic aromatic hydrocarbons (PAHs per HJ 646–2013), dioxins/furans (per HJ 77.2–2008), and benzo[a]pyrene (per HJ 956–2018). It operates on volumetric flow control principles compliant with gravimetric reference methods (HJ 618–2011, GB/T 39193–2020), utilizing real-time compensation for ambient temperature, barometric pressure, and filter loading resistance to maintain traceable, NIST-traceable standard condition (101.325 kPa, 273.15 K) volume calculations. Its architecture integrates ISO/IEC 17025-aligned metrological design—featuring dual-sensor feedback loops and closed-loop brushless DC motor control—to ensure stability under variable environmental loads and high-backpressure conditions typical of quartz fiber or PTFE membrane filtration.

Key Features

• High-capacity brushless DC vacuum pump with continuous-duty thermal management, delivering ≥30 kPa vacuum at 200 L/min against ≥25 kPa filter resistance—validated for extended operation with high-efficiency particulate adsorption media.
• True constant-flow control: Simultaneous real-time monitoring of mass flow (thermal anemometer), static pressure differential (dual-port piezoresistive sensor), and ambient temperature (PT1000 RTD) enables dynamic PID-based adjustment of motor speed to sustain setpoint flow within ±0.1% full-scale accuracy.
• Automated standard-volume conversion: Onboard calculation engine applies EPA 40 CFR Part 50 Appendix L and ISO 7708-compliant algorithms to convert measured volumetric flow into standardized reference volume (STP), incorporating real-time barometric pressure (capacitive sensor, ±0.1 kPa), temperature (±0.2 °C), and relative humidity (optional).
• Robust data integrity architecture: Non-volatile memory retains ≥100 complete sampling sessions with timestamps, flow logs, fault flags, power interruption records, and audit trails—including automatic backup during grid failure and seamless resumption upon restoration.
• Programmable multi-mode operation: Supports continuous, time-integrated, interval-based, and volume-triggered sampling protocols; configurable via intuitive LCD interface or optional USB/RS232 remote command set (SCPI-compatible syntax).
• Overload and safety protection: Automatic shutdown if flow deviation exceeds ±10% for >5 consecutive minutes; thermal cutoff, voltage surge suppression, and reverse-polarity protection integrated at PCB level.

Sample Compatibility & Compliance

The GHK-1300Q accommodates standard 47 mm and 90 mm diameter filters (quartz, Teflon, cellulose ester, PVC) and sorbent tubes (XAD-2, PU foam, silica gel) for concurrent particulate and SVOC capture. It meets all mechanical, performance, and metrological requirements stipulated in Chinese national and ecological standards—including HJ 93–2013 (PM₁₀/PM_2.5 sampler specifications), JJG 943–2011 (TSP calibration protocol), and HJ 691–2014 (SVOC sampling guidance). While not certified to EU EN 12341 or US EPA Reference/Equivalent Method designations out-of-the-box, its flow control repeatability ( 0.999), and documented uncertainty budget support third-party validation for GLP-compliant ambient monitoring networks and QA/QC laboratories operating under ISO/IEC 17025 or CNAS accreditation.

Software & Data Management

Data acquisition and reporting are supported via embedded firmware with built-in CSV export capability through USB-A host port (U-disk compatible). Each stored session includes raw sensor readings (flow, T, P, ΔP), compensated STP volume, elapsed runtime, power event log, and user-defined site ID. Optional PC software (Windows/Linux CLI) enables batch export, statistical summary (mean, SD, CV%), compliance flagging against HJ 93–2013 acceptance criteria (e.g., flow stability <±5% over 24 h), and generation of audit-ready PDF reports with digital signature fields. All data structures adhere to FAIR principles (Findable, Accessible, Interoperable, Reusable); metadata conforms to ISO 19115-2 for environmental monitoring datasets.

Applications

• Regulatory ambient air quality monitoring stations (TSP, PM₁₀, PM_2.5) under national and provincial ecological bureaus’ network protocols.
• Source apportionment studies requiring co-sampling of metals (Pb, As, Cd), halogens (F⁻), and organic tracers (levoglucosan, hopanes) on paired filter substrates.
• Indoor/outdoor exposure assessment campaigns deploying synchronized low-flow (10–50 L/min) and high-flow (100–230 L/min) configurations for size-fractionated aerosol characterization.
• Method validation and interlaboratory comparison exercises aligned with GB/T 39193–2020 gravimetric reference procedures.
• Long-term trend analysis in industrial zones, traffic corridors, and background rural sites where high backpressure resilience and uninterrupted data continuity are critical.

FAQ

Does the GHK-1300Q comply with U.S. EPA or European Union reference method requirements?
It is designed and verified per Chinese national standards (HJ 93–2013, HJ 618–2011). While its metrological performance aligns with core principles of EPA OTM-11 and EN 12341, formal designation as a U.S. Reference or EU Equivalent Method requires site-specific certification by an accredited body.
Can it operate unattended for 24+ hours under high-resistance filter conditions?
Yes—validated for ≥8 h continuous operation at maximum rated flow (230 L/min) against ≥25 kPa pressure drop, with thermal management ensuring stable motor performance and flow control fidelity.
Is the data export format compatible with LIMS or ELN systems?
Yes—CSV output includes ISO 8601 timestamps, SI units, and structured headers; optional API integration supports HTTP POST ingestion into common laboratory informatics platforms.
What maintenance intervals are recommended for field deployment?
Brushless motor requires no scheduled lubrication; annual calibration of flow, temperature, and pressure sensors is advised per JJG 943–2011; inlet cyclones and impactor plates should be cleaned after each sampling campaign per HJ 93–2013 Section 7.3.
Is firmware upgradable in the field?
Yes—via USB flash drive using signed binary images; version history and checksum verification are logged in non-volatile memory for audit purposes.