Junray ZR-3950 Environmental Air Organic Compound Sampler

Overview

The Junray ZR-3950 Environmental Air Organic Compound Sampler is a field-deployable, single-channel high-volume air sampling system engineered for the quantitative collection of semi-volatile organic compounds (SVOCs) from ambient and source-emission air matrices. It operates on the principle of active volumetric aspiration through sorbent-based media—typically polyurethane foam (PUF), XAD-2 resin, or glass fiber filters—enabling simultaneous capture of gaseous-phase, particulate-phase, and aerosol-associated SVOCs including polycyclic aromatic hydrocarbons (PAHs), nitrobenzenes, chlorobenzenes, quinolines, pyridines, organochlorine pesticides, polychlorinated biphenyls (PCBs), and dioxin/furan congeners. Designed to comply with U.S. EPA Method TO-13A, ISO 12010, and Chinese environmental standards such as HJ 647–2013, HJ 77.2–2008, and HJ 691–2014, the ZR-3950 delivers trace-level sample integrity under variable meteorological conditions and complex site topographies.

Key Features

• Single-channel high-flow architecture supporting programmable flow rates from 200 to 1200 L/min, covering standardized protocols for benzo[a]pyrene (1130 L/min), ultra-high-volume (800 L/min), and high-volume (225 L/min) sampling;
• Imported brushless DC blower with closed-loop feedback control ensuring constant flow rate (±2% stability) across dynamic backpressure up to 130 kPa;
• Integrated thermal management system enabling uninterrupted operation at ambient temperatures up to 50°C without thermal shutdown;
• Modular sorbent tube assembly using borosilicate glass and anodized aluminum housings—fully sealed before and after sampling to prevent analyte loss, photodegradation, or adsorbent contamination;
• IP54-rated enclosure with foldable stainless-steel tripod mount, rainproof and dust-resistant housing suitable for long-term unattended deployment in industrial perimeters, landfill sites, and waste-to-energy facilities;
• Dual-mode sampling control: time-weighted (1 min – 99 h 59 min) and volume-weighted (up to 999,999 L), with automatic correction to standard temperature and pressure (STP: 273.15 K, 101.325 kPa);
• Real-time environmental parameter logging: onboard sensors for ambient temperature (–20°C to 50°C), relative humidity (0–95% RH non-condensing), and barometric pressure (60–110 kPa), with optional wind speed/direction transducer interface;
• Embedded GPRS module for remote status monitoring, alarm notification, and firmware-over-the-air (FOTA) updates; Bluetooth 5.0 interface supports wireless pairing with certified thermal printers for field data verification.

Sample Compatibility & Compliance

The ZR-3950 is validated for use with EPA TO-13A-compliant sorbent configurations—including PUF/XAD-2 tandem cartridges—and meets the mechanical and metrological requirements of HJ 691–2014 (Technical Guideline for Sampling Semi-Volatile Organic Compounds in Ambient Air). Its flow accuracy (±2%) and stability are traceable to national metrology institutes and satisfy QA/QC criteria outlined in ISO/IEC 17025-accredited laboratories. The instrument’s data acquisition and storage architecture conforms to GLP data integrity principles, supporting audit-ready electronic records with timestamped metadata, operator ID tagging, and tamper-evident file encryption. While not pre-certified under FDA 21 CFR Part 11, its internal logging and USB export functionality enable full compliance when integrated into validated laboratory information management systems (LIMS).

Software & Data Management

The ZR-3950 features a 5.0-inch capacitive color touchscreen with wide-temperature operation (–20°C to 60°C), intuitive icon-driven navigation, and multilingual UI (English, Chinese, Spanish). All sampling events—including start/stop timestamps, cumulative volume, STP-corrected volume, environmental parameters, and error logs—are stored in non-volatile memory (≥16 GB) with automatic rollover and cyclic overwrite protection. Data export is supported via USB 2.0 mass-storage mode (FAT32 formatted), generating CSV and XML files compatible with EPA Compendium tools and third-party chemometric software (e.g., MATLAB, R, OpenLab CDS). Firmware upgrades are performed via signed binary packages delivered over USB or GPRS, with SHA-256 checksum validation and rollback capability.

Applications

• Ambient air monitoring networks targeting PAHs, PCBs, and dioxins near industrial zones, traffic corridors, and urban backgrounds;
• Source testing at municipal solid waste incinerators (MSWIs), hazardous waste treatment facilities, and metallurgical plants;
• Occupational exposure assessment in chemical manufacturing and pesticide formulation plants;
• Method development and inter-laboratory comparison studies requiring high-reproducibility SVOC sampling under variable atmospheric resistance;
• Long-term trend analysis under national air quality surveillance programs aligned with China’s “Blue Sky Defense Campaign” and EU Air Quality Directive 2008/50/EC.

FAQ

What sorbent media are compatible with the ZR-3950 for dioxin sampling?

The instrument supports EPA TO-13A-compliant configurations: 100 mm × 25 mm quartz fiber filter + 100 mm × 25 mm PUF + 100 mm × 25 mm XAD-2 resin, housed in borosilicate glass sleeves.
Does the ZR-3950 meet ISO 50001 or ISO 14001 requirements?

While the device itself is not certified to energy or environmental management standards, its low-power brushless motor (≤120 W nominal), thermal efficiency, and extended service life (>5000 h) support facility-level ISO 14001 implementation for emissions monitoring infrastructure.
Can sampling data be synchronized with cloud-based LIMS platforms?

Yes—via GPRS-enabled HTTP(S) POST requests to RESTful APIs or scheduled FTP/SFTP transfers using user-defined credentials and TLS 1.2 encryption.
Is calibration traceable to NIST or CNAS reference standards?

Flow calibration is performed using a primary-standard dry gas meter traceable to CNAS (Certificate No. CNAS LXXXXX), with optional NIST-traceable recalibration kits available upon request.
What is the operating altitude limit for reliable performance?

The ZR-3950 maintains specified flow accuracy and vacuum capability up to 3000 m above sea level, with automatic barometric compensation applied to all STP calculations.