Yinghe GFC-5B Intrinsically Safe Personal Dust Sampler

Overview

The Yinghe GFC-5B Intrinsically Safe Personal Dust Sampler is a certified hazardous-area-compatible sampling instrument engineered for compliant, long-duration personal exposure monitoring of airborne particulate matter in occupational environments. Designed in strict accordance with the technical requirements of GBZ/T 192.1–192.2 (Determination of Dust in Workplace Air), this device implements constant-flow volumetric sampling via membrane filtration to quantify total dust, respirable dust, and metal-containing aerosols. Its intrinsic safety certification (Ex ib IIB T4 Gb per GB 3836.4–2021) ensures safe operation in Zone 1 explosive atmospheres—common in coal mines, chemical processing facilities, grain handling terminals, and metal fabrication plants. The sampler utilizes a brushless DC diaphragm pump with active flow feedback control, enabling stable volumetric delivery across variable filter loading conditions and ambient pressure gradients.

Key Features

• Intrinsically safe design certified to GB 3836.4–2021 (Ex ib IIB T4 Gb), suitable for use in flammable gas/vapor environments (e.g., methane, hydrogen, solvent vapors)
• High-torque, low-power brushless pump delivering ≥5.0 L/min against 1000 Pa backpressure—maintaining accuracy even as filter resistance increases during extended sampling
• Precision electromechanical timer with 0–24 h 59 min range and ≤0.1% timing deviation, supporting full-shift (8 h) or multi-shift (up to 24 h) exposure assessment protocols
• Compact, ergonomic form factor (100 × 52 × 152 mm; 500 g) optimized for belt-mounted personal sampling without impeding worker mobility or PPE integration
• Rechargeable 7.4 V lithium-ion battery pack providing ≥8 hours of continuous operation at nominal flow rates (1–5 L/min), with low-voltage warning and automatic shutdown to preserve data integrity
• Dual-mode flow calibration support: factory-traceable electronic calibration via integrated thermal mass flow sensor; field verification compatible with primary-standard rotameters or bubble meters per ISO 7706 and GB/T 17061

Sample Compatibility & Compliance

The GFC-5B supports standardized filter-based sampling configurations aligned with Chinese occupational health standards and internationally harmonized methodologies. For total dust assessment (GBZ/T 192.1), it operates with 37 mm polyvinyl chloride (PVC) or mixed-cellulose ester (MCE) filters mounted in 37 mm plastic cassettes. Respirable dust sampling (GBZ/T 192.2) employs a 30 mm cyclonic pre-separator meeting the British Medical Research Council (BMRC) respirable convention (50% cut-point at 4 µm aerodynamic diameter) with corresponding 30 mm filters. For metallic aerosols and compounds (GBZ/T 160 series), the unit interfaces with 25 mm small-cassette holders using mixed-fiber (e.g., MCE + cellulose) membranes. All sampling setups comply with ISO 7706 (pump performance testing), ISO 8508 (dust sampling pump calibration), and are fully traceable to national metrological standards maintained by CNAS-accredited laboratories.

Software & Data Management

While the GFC-5B operates as a standalone hardware platform without embedded Bluetooth or Wi-Fi, its timing and flow parameters are fully documentable for GLP/GMP-aligned recordkeeping. Each unit includes a tamper-evident calibration label with unique ID, date of last verification, and certified flow accuracy data. Users may integrate sampling logs into enterprise EHS management systems via manual entry or barcode-scanned batch reporting. For audit readiness, the device supports full traceability under China’s Regulations on Occupational Health Surveillance (Order No. 48 of the State Administration of Work Safety) and aligns with documentation expectations of ISO 45001:2018 clause 8.2 (Hazard Identification and Assessment). Optional NIST-traceable calibration certificates (available upon request) include uncertainty budgets per ISO/IEC 17025:2017.

Applications

• Personal exposure monitoring for coal miners, foundry workers, construction personnel, and pharmaceutical manufacturing staff
• Respirable crystalline silica (RCS) assessment in sandblasting, concrete cutting, and quarry operations
• Heavy metal aerosol characterization (e.g., lead, cadmium, chromium) in battery recycling, electroplating, and pigment production
• Baseline industrial hygiene surveys supporting OEL (Occupational Exposure Limit) compliance per GBZ 2.1–2019
• Validation of local exhaust ventilation (LEV) system performance through upstream/downstream paired sampling

FAQ

Is the GFC-5B certified for use in ATEX or IECEx zones?
No—it holds only GB 3836.4–2021 intrinsic safety certification (Ex ib IIB T4 Gb) for use in Chinese Class I, Division 1 hazardous locations. It is not ATEX- or IECEx-certified.
Can the flow rate be adjusted in real time during sampling?
Yes—flow is digitally set prior to deployment via tactile keypad; once initiated, the closed-loop control system maintains setpoint within ±5% despite filter loading or temperature fluctuation.
What filter media are recommended for respirable dust sampling?
30 mm PVC or polyurethane foam filters installed in BMRC-conforming cyclone samplers (e.g., GK2.69 or IOM-style heads), operated strictly at 2.0 L/min per GBZ/T 192.2.
Does the device store sampling runtime or flow logs internally?
No—the GFC-5B does not feature onboard data logging; timing and flow settings are manually recorded per sample event to ensure ALARA-compliant documentation practices.
Is battery replacement user-serviceable?
The 7.4 V Li-ion battery pack is field-replaceable using standard Torx tools; replacement units are supplied with CE-marked safety circuitry and thermal cutoff protection.