Junray ZR-3714 Multi-Channel Flue Gas Sampler

Overview

The Junray ZR-3714 Multi-Channel Flue Gas Sampler is an engineered field-deployable instrument designed for quantitative collection of gaseous and semi-volatile analytes from industrial exhaust streams and ambient air matrices. It operates on dual sampling principles: solution absorption (e.g., impingers with aqueous or organic solvents) and solid-phase adsorption (e.g., Tenax, Carbopack, or activated carbon tubes), enabling compliance with both regulatory stack testing and ambient VOC monitoring protocols. The system supports simultaneous multi-path sampling across four independent channels—two optimized for low-flow adsorption tube applications (10–200 mL/min), and two configured for higher-flow solution-based capture (0.2–1.5 L/min). Its architecture accommodates both negative- and positive-pressure duct environments, making it suitable for integration with flue gas pre-conditioning units—including heated sampling lines, ice-bath traps for mercury speciation, and in-line moisture removal modules. The device implements volumetric flow control via precision thermal mass flow sensors calibrated per ISO 6145-2 and verified against gravimetric reference standards, ensuring traceable measurement integrity under variable temperature and humidity conditions.

Key Features

• Four independent sampling channels: two low-flow (10–200 mL/min) and two high-flow (0.2–1.5 L/min), each with isolated flow control and real-time digital monitoring
• Integrated rechargeable lithium-ion battery providing ≥8 hours of continuous operation at nominal load, supporting unattended field deployment
• 5.0-inch capacitive touchscreen interface with intuitive icon-driven navigation, multilingual firmware support (English/Chinese), and on-device calibration log access
• High-stability electronic flow meters with corrosion-resistant wetted materials (316L stainless steel, PTFE, and FKM seals), rated for continuous exposure to saturated humid flue gas (up to 85% RH)
• Automated system leak-check function compliant with HJ/T 47–1999 and EPA Method 30B requirements, executing pressure decay validation prior to each sampling sequence
• USB 2.0 interface for raw data export in CSV format; optional 4G LTE module enables secure cloud upload and remote configuration via TLS 1.2-encrypted MQTT protocol
• Expandable modular architecture: supports optional heated sampling line (temperature range: 50–180°C, ±2°C stability), Bluetooth thermal printer (for on-site chain-of-custody documentation), GPS geotagging (NMEA 0183 output), and flue gas velocity/temperature/pressure sensing (via DIN-rail mounted auxiliary probe interface)

Sample Compatibility & Compliance

The ZR-3714 is validated for sampling target analytes defined in major national and international methods, including benzene homologues (HJ 583–2010, HJ 584–2010), aldehydes and ketones (HJ 683–2014), halogenated hydrocarbons (HJ 645–2013), nitrobenzenes (HJ 739–2015), non-methane hydrocarbons (HJ 38–2017), and elemental/oxidized mercury species (HJ 543–2009, HJ 917–2017, EPA Method 30B). Its flow accuracy (±2.5% of reading) meets the performance criteria specified in HJ/T 375–2007 and JJG 956–2013 for atmospheric samplers. When paired with certified adsorbent tubes and appropriate thermal desorption–GC/MS workflows, it satisfies data quality objectives outlined in ISO/IEC 17025-accredited laboratories performing VOC analysis under GLP or ISO 14001 environmental management systems. All firmware and data handling routines comply with audit-trail requirements per FDA 21 CFR Part 11 when used in regulated emissions verification contexts.

Software & Data Management

The embedded operating system records time-stamped flow profiles, battery status, leak-test results, and user-defined sampling parameters (start/stop times, flow setpoints, channel enable states). Data files include metadata fields for sampler ID, operator code, site ID, sampling duration, ambient temperature/humidity (if external sensor connected), and calibration certificate expiry dates. Exported CSV files are structured for direct ingestion into LIMS platforms (e.g., Thermo Fisher SampleManager, LabVantage) and EPA-approved reporting tools such as ERT’s EnviroReporter. Optional PC-based desktop software provides advanced diagnostics—including flow deviation trend analysis, battery health forecasting, and firmware update rollback capability. Remote firmware updates are digitally signed and authenticated via X.509 certificate validation.

Applications

• Regulatory stack testing for VOC emissions from chemical manufacturing, coating operations, and pharmaceutical production facilities
• Ambient air monitoring networks targeting BTEX, formaldehyde, chloroform, and other priority hazardous air pollutants (HAPs)
• Mercury speciation studies requiring cryogenic trapping followed by cold vapor atomic absorption spectroscopy (CVAAS)
• Method validation and interlaboratory comparison exercises under CNAS or ILAC accreditation frameworks
• Industrial hygiene assessments in confined-space combustion environments where real-time positional awareness (GPS) and remote telemetry enhance operational safety

FAQ

Does the ZR-3714 support EPA Method 30B for mercury sampling?
Yes—when used with certified mercury-specific adsorption tubes (e.g., Au-coated quartz or iodinated carbon) and integrated with a chilled impinger train or ice-bath sampling manifold per EPA Method 30B specifications.
Can the instrument operate continuously for more than one shift without recharging?
With fully charged batteries and average sampling loads (two channels active at 100 mL/min), runtime exceeds 8 hours; optional external power banks extend operation to 24+ hours via USB-C PD input.
Is the flow calibration traceable to national standards?
Yes—factory calibration is performed using NIST-traceable primary flow standards (dry calibrators per ISO 6145-2), and certificates include uncertainty budgets and environmental correction factors.
What level of cybersecurity is implemented for remote data transmission?
4G module communications use TLS 1.2 encryption, device authentication via client-side X.509 certificates, and role-based access control (RBAC) enforced at the cloud API gateway layer.
Are replacement parts and service manuals available internationally?
Junray provides global spare parts distribution through authorized technical partners, and English-language service manuals—including schematic diagrams, firmware recovery procedures, and preventive maintenance schedules—are accessible via secure customer portal with annual subscription.