Junray ZR-G07 Aerosol Diluter
| Brand | Junray |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | ZR-G07 |
| Pricing | Available upon request |
Overview
The Junray ZR-G07 Aerosol Diluter is a precision-engineered, portable instrument designed to reduce the number concentration of high-concentration aerosol samples—typically exceeding the upper detection limit of optical particle counters (OPCs), condensation particle counters (CPCs), or scanning mobility particle sizers (SMPS)—to within their linear and calibrated operating range. It operates on the principle of controlled turbulent mixing via dual-flow laminar dilution, maintaining representative aerosol physical properties—including particle size distribution integrity, volatility behavior, and charge state—throughout the dilution process. Unlike passive or fixed-ratio diluters, the ZR-G07 delivers stable, repeatable dilution ratios under variable inlet concentrations and environmental conditions, making it suitable for field-deployable air quality monitoring, cleanroom validation, filter testing, and occupational hygiene assessments where real-time, traceable aerosol quantification is required.
Key Features
- Stable and reproducible dilution ratio across operational flow rates (typically 1:10 to 1:100, configurable per application requirements)
- Compact, battery-operated design with integrated rechargeable Li-ion power system—no external AC supply required
- Low-loss aerosol pathway constructed from electrostatic-dissipative tubing (surface resistivity <10⁹ Ω/sq), minimizing particle deposition and wall losses, especially for sub-100 nm particles
- Thermally balanced internal geometry to preserve aerosol gas-phase temperature and relative humidity during dilution
- Real-time pressure and flow monitoring via built-in differential pressure sensors and mass flow controllers (MFCs), enabling verification of dilution fidelity
- Robust mechanical architecture compliant with IP54 ingress protection for use in industrial and cleanroom environments
Sample Compatibility & Compliance
The ZR-G07 accommodates aerosols generated from solid combustion, liquid atomization, dry powder dispersion, and microbial challenges—including polydisperse sodium chloride, dioctyl phthalate (DOP), polystyrene latex (PSL), and ambient particulate matter (PM2.5/PM10). It maintains compatibility with ISO 27427:2018 (aerosol generation and dilution systems), and supports measurement traceability aligned with ISO 14644-3:2019 (cleanroom test methods), GB/T 36066–2018 (Chinese national standard for cleanroom aerosol testing), and JJF 2066–2023 (Calibration Specification for Aerosol Diluters). While not intrinsically certified to ATEX or IECEx, its non-sparking materials and low-power operation enable safe deployment in Class II, Division 2 hazardous locations when used with appropriate upstream sampling interfaces.
Software & Data Management
The ZR-G07 operates autonomously but integrates seamlessly with third-party data acquisition platforms via analog voltage outputs (0–5 V DC) and RS-485 Modbus RTU protocol. Optional firmware enables time-synchronized logging of dilution ratio, total flow rate, and pressure drop—data compatible with GLP/GMP-compliant audit trails when paired with validated DAQ software (e.g., LabVIEW-based systems or ISO/IEC 17025-accredited laboratory information management systems). All calibration parameters—including MFC calibration coefficients and dilution ratio verification logs—are stored in non-volatile memory and exportable as CSV for regulatory review. The device meets the functional requirements of FDA 21 CFR Part 11 for electronic records when deployed in validated configurations with appropriate user access controls.
Applications
- Validation of HEPA/ULPA filters using challenge aerosols at elevated concentrations (e.g., EN 1822, ISO 14644-3)
- Occupational exposure assessment in spray booths, pharmaceutical powder handling, and nanomaterial synthesis facilities
- Calibration and verification of particle counters in accordance with ISO 21501-4 and JJF 1190
- Field-based monitoring of wildfire smoke, industrial stack emissions, and indoor bioaerosol events
- Supporting ISO 14644-1 cleanroom classification by enabling accurate measurement of ≥0.1 µm particles in Class 1–3 environments
FAQ
What dilution ratios does the ZR-G07 support?
The ZR-G07 provides adjustable dilution ratios ranging from 1:10 to 1:100, selected via calibrated needle valves and verified using upstream/downstream CPC measurements.
Does the ZR-G07 require compressed air or vacuum sources?
No—it incorporates two independent, brushless DC micro-pumps for sample and dilution air intake, eliminating dependency on external gas supplies.
Can the ZR-G07 be used with volatile organic compound (VOC)-laden aerosols?
Yes; its short residence time (<0.5 s) and inert wetted path minimize evaporation artifacts, preserving droplet-phase integrity for hygroscopic or semi-volatile aerosols.
Is firmware update capability available?
Yes—field updates are performed via USB-C interface using Junray’s certified configuration utility, with version-controlled change logs archived per ISO/IEC 17025 requirements.
How is dilution ratio accuracy verified?
Users perform ratio verification using paired particle counters upstream and downstream; the device includes a dedicated calibration port for NIST-traceable flow meter integration per JJF 2066–2023.
