Beijing Kean Beilao-20 Constant-Flow Dust Sampler
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Distributor |
| Product Origin | Domestic (China) |
| Model | Beilao-20 |
| Price | USD 570 (approx.) |
Overview
The Beijing Kean Beilao-20 Constant-Flow Dust Sampler is a precision-engineered environmental sampling instrument designed for regulatory-compliant, time-weighted average (TWA) collection of airborne particulate matter in occupational and ambient air monitoring applications. It operates on a closed-loop proportional-integral-derivative (PID) flow control algorithm, ensuring stable volumetric airflow across variable filter loading and pressure differentials—critical for maintaining ISO/IEC 17025-aligned measurement integrity. The sampler supports dual-mode particulate fractionation via interchangeable sampling heads: a total dust head conforming to ISO 7708:1995 for coarse particulates (aerodynamic diameter < 100 µm), and a respirable dust head calibrated to the British Medical Research Council (BMRC) inhalability curve (ISO 7708:1995 Annex B), enabling selective capture of particles ≤ 4 µm aerodynamic diameter—the size range most likely to deposit in the alveolar region of the human respiratory tract. Its core function aligns with occupational hygiene protocols mandated under OSHA 29 CFR 1910.1200 and EU Directive 2004/37/EC (CARC), where quantitative exposure assessment of respirable crystalline silica, metal fumes, fluorides, and other workplace aerosols is legally required.
Key Features
- PID-based real-time flow regulation maintains setpoint accuracy within ±3% over full operational range (1–5 L/min), independent of battery voltage decay or filter clogging.
- Modular sampling head interface compatible with standard 37-mm and 25-mm diameter filter cassettes (e.g., PVC, mixed cellulose ester, quartz fiber), supporting gravimetric, XRF, and ion chromatography analysis post-collection.
- Integrated lithium-ion rechargeable battery provides ≥8 hours continuous operation at 2 L/min; optional AC adapter enables unattended 24/7 field deployment.
- Backlit LCD display with real-time flow rate, elapsed time, total sampled volume, and low-battery warning—data logged internally at 1-minute intervals.
- Ruggedized ABS housing rated IP54 for dust and splash resistance, tested per IEC 60529; operating temperature range: −10 °C to +45 °C.
Sample Compatibility & Compliance
The Beilao-20 meets the technical performance criteria specified in HJ/T 374–2007 (TSP samplers), HJ/T 375–2007 (ambient air samplers), and GBZ/T 159–2017 (workplace air sampling methodology). Its flow stability, timer accuracy (±0.2%), and pressure drop compensation are validated against national metrological verification procedures. For international equivalence, its respirable fractionation performance aligns with ISO/CEN TR 13177:2014 guidance on inhalable/respirable particle size-selective sampling. When used with NIOSH Method 0500 (total dust) or 0600 (respirable dust), it satisfies GLP documentation requirements for occupational exposure records under ANSI Z88.2–2015.
Software & Data Management
Internal memory stores up to 999 sampling sessions with timestamped flow logs. Data export is supported via USB-C interface using vendor-provided Windows-compatible desktop software (v3.2+), which generates audit-ready CSV reports compliant with FDA 21 CFR Part 11 requirements—including electronic signatures, user access logs, and immutable session history. Software includes built-in validation checks for flow deviation alerts and auto-flagging of out-of-spec sampling events per GBZ/T 159–2017 Section 6.3.
Applications
- Workplace exposure monitoring for respirable crystalline silica (RCS), lead, beryllium, cadmium, and soluble fluorides in mining, foundry, construction, and ceramics manufacturing.
- Baseline ambient PM characterization in urban and industrial boundary zones per China’s Ambient Air Quality Standard (GB 3095–2012).
- Validation of local exhaust ventilation (LEV) system efficiency through paired upstream/downstream sampling per EN 689:2018.
- Research-grade aerosol mass concentration studies requiring traceable volumetric flow calibration (NIST-traceable flowmeter calibration certificate available upon request).
FAQ
Is the Beilao-20 certified for use in GLP-regulated laboratories?
Yes—when operated with documented calibration records, trained personnel, and validated sampling protocols, it fulfills instrumentation requirements under OECD GLP Principles (Section 5.2.2) and CNAS-CL01:2018.
Can it be calibrated to NIST-traceable standards?
Calibration is performed using a primary-standard dry gas meter traceable to NIM (National Institute of Metrology, China); NIST-equivalent calibration certificates are issued upon third-party verification.
What filter media are recommended for heavy metal analysis?
Quartz fiber filters (e.g., Pallflex Tissuquartz QAT-UP) for thermal-optical carbon analysis, or polycarbonate membranes (e.g., Whatman Nuclepore) for subsequent ICP-MS digestion—both compatible with the 37-mm cassette holder.
Does it support remote data retrieval or IoT integration?
No native wireless connectivity; however, USB data dumps can be automated via Python scripts integrated into enterprise LIMS platforms.
