Junray ZR-3960 Environmental Air Aerosol Sampler for Benzo[a]pyrene

Overview

The Junray ZR-3960 Environmental Air Aerosol Sampler is a precision-engineered, field-deployable particulate matter (PM) sampling system designed for regulatory-grade collection of total suspended particulates (TSP), inhalable PM₁₀, fine PM_2.5, and priority organic pollutants—including benzo[a]pyrene (BaP)—from ambient air. It operates on the principle of isokinetic or constant-flow gravimetric sampling, compliant with internationally recognized methodologies for atmospheric aerosol characterization. The instrument integrates a high-stability volumetric flow control architecture with real-time environmental parameter monitoring, enabling trace-level BaP collection on quartz fiber or PTFE filters for subsequent analysis via HPLC–UV/FLD or GC–MS per HJ 956–2018 and EPA TO-13A protocols. Its robust mechanical design and embedded ARM-based controller ensure uninterrupted operation in diverse environmental conditions—making it suitable for long-term ambient monitoring networks, source apportionment studies, occupational exposure assessment, and method validation under GLP-aligned workflows.

Key Features

• Embedded ARM microcontroller with hardware real-time clock and non-volatile data logging for audit-trail integrity
• Digital calibration capability for ambient temperature, pre-sampler temperature, differential pressure, pre-sampler pressure, barometric pressure, and instantaneous flow rate—with segmented flow calibration across the full operational range (e.g., 0.01–1.2 m³/min) to ensure ≤±2% flow accuracy per HJ 93–2013
• Automatic flow failure detection: halts sampling and saves metadata if instantaneous flow deviates >±10% from setpoint for ≥5 consecutive minutes
• Overload protection and power-failure recovery: preserves all sampling metadata (start time, elapsed duration, accumulated volume, environmental conditions) during unexpected shutdown; resumes sampling automatically upon power restoration
• Low-noise, brushless diaphragm pump rated for ≥20,000 hours MTBF, coupled with PWM-driven speed control for stable flow under variable backpressure
• High-contrast monochrome LCD interface with Chinese-language menu navigation (configurable firmware supports English UI localization upon request)
• Modular inlet compatibility: accepts standardized PM₁₀ and PM_2.5 cyclone cutters per ISO 7708 and EN 12341 specifications
• Multi-mode sampling logic: quantitative volume-based, timed-start, interval, and immediate-start protocols with selectable reference conditions (standard, actual, or reference temperature/pressure)

Sample Compatibility & Compliance

The ZR-3960 supports 47 mm and 90 mm diameter filter substrates—including quartz fiber (for BaP thermal desorption/HPLC), Teflon® membrane (for elemental analysis), and cellulose ester (for gravimetric PM mass determination). All sampling configurations comply with national standard methods including HJ 956–2018 (BaP by HPLC), HJ 618–2011 (PM₁₀/PM_2.5 gravimetry), and HJ 194–2017 (manual air quality monitoring procedures). The device meets electromagnetic compatibility (EMC) Class B requirements per GB/T 18268.1–2010 and is certified for use in environments requiring adherence to ISO/IEC 17025–2017 technical competence criteria when operated within accredited laboratory or field-monitoring frameworks.

Software & Data Management

Data output is provided via RS232 serial interface (optional USB-to-serial adapter available) compatible with Windows-based acquisition software supporting CSV export, time-series plotting, and batch metadata annotation. Logged parameters include: sampling start/stop timestamps, cumulative volumetric flow (standard, actual, and reference conditions), real-time temperature/pressure/differential pressure, and fault event logs. All stored records maintain traceability for regulatory reporting and satisfy minimum data integrity requirements aligned with US FDA 21 CFR Part 11 principles—particularly when paired with validated third-party LIMS integration.

Applications

• Ambient air quality monitoring networks for compliance with national ambient air quality standards (NAAQS-equivalent frameworks)
• Source identification and receptor modeling studies targeting polycyclic aromatic hydrocarbons (PAHs) in urban, industrial, and rural settings
• Health-related exposure assessment in proximity to traffic corridors, coke ovens, asphalt plants, and waste incineration facilities
• Method development and inter-laboratory comparison exercises for BaP quantification in accordance with HJ 956–2018 and ISO 12884
• Long-term trend analysis of PM-bound carcinogens in support of WHO Global Air Quality Guidelines implementation

FAQ

What filter types are recommended for benzo[a]pyrene sampling?
Quartz fiber filters (QFF) are strongly recommended for BaP collection due to their low background PAH content and thermal stability during solvent extraction or thermal desorption. Pre-baked QFFs meeting HJ 956–2018 specifications are required.
Does the ZR-3960 support automatic temperature and pressure correction to standard conditions?
Yes—the instrument calculates and displays cumulative sampled volume at standard temperature (273.15 K) and pressure (101.325 kPa), actual ambient conditions, and reference conditions (298.15 K, 101.325 kPa) per GB/T 15432–1995 and ISO 7205.
Is the flow control system traceable to national metrological standards?
The integrated orifice plate flow sensor is factory-calibrated against NIM-traceable primary standards; users may perform field verification using a certified bubble meter or electronic calibrator per HJ/T 374–2007 Annex B.
Can the ZR-3960 be integrated into an automated monitoring station?
Yes—it supports Modbus RTU protocol via optional RS485 expansion module, enabling remote status polling, parameter configuration, and alarm triggering within SCADA-compatible environmental telemetry systems.