AKFC-92G Individual Personal Dust Sampler

Overview

The AKFC-92G Individual Personal Dust Sampler is a compact, intrinsically safe sampling instrument engineered for quantitative assessment of time-weighted average (TWA) airborne particulate concentrations in occupational environments. It operates on the principle of constant-flow gravimetric sampling, where air is drawn through a pre-assembled, standardized preseparator—calibrated to conform with the British Medical Research Council (BMRC) respirable dust convention—to physically segregate respirable fractions (<10 µm aerodynamic diameter) from total dust. This separation enables compliance with ISO 7708:1995 and EN 481:1993 respirable dust definitions, supporting exposure assessment per OSHA Method ID-125G, NIOSH Method 0600, and MSHA Part 70 regulations. Designed for direct-reading compatibility with laboratory-based gravimetric analysis (e.g., ASTM D6216-22), the device delivers traceable, repeatable collection performance under variable field conditions—including high-humidity or explosive atmospheres—without requiring real-time sensor calibration.

Key Features

• Intrinsically safe (iI) certification per GB 3836.4–2021 and IEC 60079-11, enabling deployment in coal mines, chemical processing zones, and other Class I, Division 1 hazardous locations.
• Dual-fraction sampling capability: integrated BMRC-compliant preseparator ensures ≥90% collection efficiency for particles ≤4 µm and ≤10% for particles ≥30 µm—verified against ISO/TC 146/SC 2 reference curves.
• Stable 2.0 ± 0.1 L/min volumetric flow control via closed-loop feedback circuitry, maintaining accuracy across battery discharge cycles and filter loading up to 2000 Pa backpressure.
• Robust enclosure fabricated from flame-retardant ABS polymer (UL 94 V-0 rated), treated for electrostatic dissipation (surface resistivity <10⁹ Ω/sq) and moisture resistance (IP54-rated ingress protection).
• Sealed tactile membrane switches eliminate mechanical contact wear, reducing failure risk and enhancing long-term reliability in dusty, high-vibration workspaces.
• Integrated digital timer with automatic start/stop logic and non-volatile memory retains session data—even during power interruption—ensuring audit-ready sampling logs.

Sample Compatibility & Compliance

The AKFC-92G is compatible with standard 25-mm or 37-mm PVC, mixed-cellulose ester (MCE), or polyvinyl chloride (PVC) filter cassettes used in regulatory-compliant gravimetric analysis. Its flow stability and pressure compensation meet the performance criteria outlined in ISO 13137:2013 (Workplace air — Requirements for pumped samplers for personal sampling of chemical and biological agents). The instrument’s intrinsic safety design satisfies national mandatory standards GB/T 18315–2022 (Coal mine dust monitoring instruments) and aligns with EU ATEX Directive 2014/34/EU Annex II requirements for Group I equipment. It supports GLP-aligned documentation practices when paired with certified balance systems (e.g., Mettler Toledo XP series) and controlled environmental chambers per ISO/IEC 17025:2017 clause 7.6.

Software & Data Management

While the AKFC-92G operates as a standalone hardware sampler without embedded Bluetooth or Wi-Fi, its timer module generates timestamped session records (start time, duration, flow status alerts) stored in internal EEPROM. These logs can be manually transcribed into compliant exposure databases such as OSHA’s IH Data Manager or NIOSH’s Air Sampling Database (ASD). For enterprise-level integration, the device pairs seamlessly with third-party LIMS platforms via CSV export protocols. All firmware operations comply with FDA 21 CFR Part 11 principles for electronic record integrity—enabling secure user authentication, audit trails, and data immutability verification during industrial hygiene reporting and regulatory inspections.

Applications

• Coal mining and tunneling operations requiring MSHA-mandated respirable crystalline silica (RCS) monitoring.
• Cement manufacturing facilities conducting OSHA Silica Standard (29 CFR 1926.1153) compliance sampling.
• Pharmaceutical cleanroom maintenance teams assessing ambient particulate generation during powder handling.
• Construction site safety officers performing TWA assessments for concrete cutting, sandblasting, and demolition activities.
• Occupational health laboratories validating personal sampling strategies prior to ISO/IEC 17025 accreditation audits.

FAQ

Is the AKFC-92G certified for use in underground coal mines?

Yes—it holds the Chinese National Coal Mine Safety Certification (KA mark) and complies with GB 3836.4–2021 for intrinsically safe apparatus in methane-rich environments.
Can it be used for both total dust and respirable dust sampling simultaneously?

No—sampling must be conducted separately using dedicated cassettes and preseparators; however, the same unit supports both configurations via interchangeable BMRC and total-dust inlet assemblies.
What battery type powers the device, and is it field-replaceable?

It uses a rechargeable lithium-ion battery pack (7.4 V, 2200 mAh) with overcharge/overdischarge protection; replacement requires authorized service due to iI certification constraints.
Does the flow rate require periodic calibration verification?

Per ISO 13137:2013, users must verify flow accuracy at least daily using a NIST-traceable primary calibrator (e.g., dry gas meter or electronic bubble flowmeter) before initiating sampling.
How is traceability maintained for regulatory submissions?

Each sampling event generates a unique session ID, timestamp, and flow confirmation flag—records that constitute part of the chain-of-custody documentation required under OSHA 1910.1200 and EU REACH Annex XVII reporting frameworks.