Junray ZR-5213 Dynamic Gas Dilution System
| Brand | Junray |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM Manufacturer |
| Country of Origin | China |
| Model | ZR-5213 |
| Pricing | Upon Request |
Overview
The Junray ZR-5213 Dynamic Gas Dilution System is an engineered precision instrument designed for the accurate, real-time preparation of low-concentration calibration gas standards from high-concentration source gases—including certified reference materials (CRMs), stack effluent simulants, and synthetic multi-component mixtures. It operates on the principle of dynamic volumetric dilution using thermal mass flow control (MFC), in strict accordance with GB/T 5275.7–2014 (“Gas analysis — Preparation of calibration gas mixtures using dynamic volumetric methods — Part 7: Thermal mass flow controllers”). Unlike static blending or permeation-based systems, the ZR-5213 delivers continuous, stable output streams with traceable dilution ratios—enabling reliable calibration and verification of analyzers used in regulatory emission monitoring, environmental laboratory metrology, and instrument manufacturing QA/QC workflows.
Key Features
- Two independent active gas delivery channels, each equipped with calibrated thermal mass flow controllers for precise, synchronized control of primary and diluent gas streams.
- Dilution ratio range up to 1:100 (v/v), programmable in discrete steps; supports both fixed-ratio and time-varying dilution profiles for dynamic standard generation.
- Integrated positive-pressure drive system eliminates reliance on external gas supply pressure—capable of drawing and metering non-high-pressure gases (e.g., ambient air, nitrogen, zero air, or low-pressure cylinder sources) without vacuum assistance.
- Gas-wetted components constructed from chemically inert, low-adsorption materials including electropolished 316L stainless steel, PTFE-sealed solenoid valves, and fluoropolymer-coated flow sensors—ensuring minimal memory effect and cross-contamination for reactive species (e.g., SO₂, NOₓ, NH₃, H₂S).
- Universal power architecture supporting both AC mains (100–240 VAC, 50/60 Hz) and DC input (12–24 VDC), enabling uninterrupted operation during field deployments, mobile lab missions, or emergency calibration response scenarios.
Sample Compatibility & Compliance
The ZR-5213 is validated for use with a broad spectrum of calibration and process gases, including but not limited to: SO₂, NO, NO₂, CO, CO₂, O₂, CH₄, VOCs (e.g., benzene, toluene), and halogenated compounds—provided they remain thermally stable and non-corrosive under operating conditions (≤50 °C, ≤300 kPa absolute). Its design aligns with methodological requirements outlined in HJ 57–2017 (SO₂ determination via potentiometric electrolysis), HJ 1131–2020 and HJ 1132–2020 (portable UV absorption methods for SO₂ and NOₓ), and supports compliance with ISO/IEC 17025:2017 clause 5.5.2 (verification of calibration gas preparation systems). While not certified to IEC 61508 or ATEX, its electrical architecture meets IP54 ingress protection for temporary outdoor deployment when housed in appropriate environmental enclosures.
Software & Data Management
The system includes embedded firmware with local parameter configuration via intuitive front-panel keypad and LCD interface. Optional RS-232 or USB-C serial connectivity enables remote command-and-control integration into laboratory information management systems (LIMS) or automated calibration workstations. All dilution events—including timestamped setpoints, actual MFC readings, and operational status logs—are stored internally (non-volatile memory, ≥10,000 records) and exportable as CSV files. Audit trails meet GLP-aligned documentation requirements, supporting traceability per ISO/IEC 17025 and facilitating FDA 21 CFR Part 11-compliant validation when paired with qualified third-party software platforms.
Applications
- Primary and secondary calibration of continuous emission monitoring systems (CEMS) for SO₂, NOₓ, CO, and O₂ in power plants, cement kilns, and waste incinerators.
- Verification and span-checking of portable UV absorption, electrochemical, and NDIR gas analyzers deployed in ambient air quality networks and industrial hygiene surveys.
- Development and performance testing of new gas sensor technologies requiring repeatable, low-ppb-level challenge gases.
- Reference material production laboratories generating matrix-matched calibration blends for accredited proficiency testing schemes.
- Method validation studies supporting EPA Method 205, EN 14181, and China’s HJ series environmental monitoring standards.
FAQ
What is the minimum detectable concentration achievable with the ZR-5213?
The lower limit depends on source gas purity, analyzer sensitivity, and background contamination—but typical sub-ppm (µmol/mol) outputs are reproducible with certified 100 ppm SO₂ or NO CRM cylinders.
Can the ZR-5213 be used with corrosive gases such as Cl₂ or HF?
No. While corrosion-resistant materials are employed, the system is not rated for halogens, strong acids, or condensable vapors. Consult technical support for custom wetted-path upgrades.
Is firmware upgrade capability supported?
Yes—field-upgradable via USB flash drive using signed firmware binaries provided under Junray’s authorized service agreement.
Does the unit include NIST-traceable calibration certificates?
Standard delivery includes factory calibration reports for all MFCs; NIST-traceable certification is available as an optional add-on service with documented uncertainty budgets.
What maintenance intervals are recommended?
Quarterly verification of flow accuracy against reference standards is advised; filter elements should be replaced every 6 months or after 2,000 operating hours, whichever occurs first.
