Wobo Industrial Equipment Co., Ltd.
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Product Overview
The gasoline vehicle emissions gas analyzer is a professional instrument designed for high-precision measurement of exhaust emissions from gasoline engines. It is based on micro-flow infrared dual-chamber sensor technology and integrates non-dispersive infrared (NDIR), non-dispersive ultraviolet (NDUV), and electrochemical analysis methods to accurately measure multiple gas components, including NO, NO₂, HC, CO, CO₂, and O₂.
The analyzer also features automatic air–fuel ratio calculation and display, providing reliable data for evaluating engine combustion performance and emission characteristics. It complies with the Chinese standards GB 18285-2018 and JJG 688-2017, achieving 00-level measurement accuracy and meeting the requirements of high-standard emission testing applications.
Working Principle
The analyzer combines multiple advanced detection technologies for comprehensive multi-gas analysis.
NO is measured using a micro-flow infrared dual-chamber sensor, where the dual-cell structure and optical filtering compare infrared absorption signals to minimize the effects of temperature fluctuations and sensor aging.
HC, CO, and CO₂ are measured using non-dispersive infrared (NDIR) absorption, based on the selective absorption of specific infrared wavelengths by different gases.
NO₂ is directly measured using non-dispersive ultraviolet (NDUV) absorption, eliminating the need for a NOx converter.
O₂ is detected using an electrochemical sensor, where gas reactions generate electrical signals proportional to concentration.
The system incorporates multi-stage filtration and advanced algorithms for linear signal correction, along with temperature and pressure compensation to enhance measurement accuracy and stability. It also automatically calculates the air–fuel ratio for comprehensive emission analysis.
Key Features
- High-Precision NO Measurement: Micro-flow infrared dual-chamber sensor ensures accurate and stable long-term NO detection.
- Direct NO & NO₂ Measurement: Eliminates the need for a NOx converter, improving efficiency and reducing maintenance.
- Multi-Gas Detection: Combines NDIR and electrochemical technologies for simultaneous measurement of HC, CO, CO₂, and O₂.
- Air–Fuel Ratio Calculation: Automatically calculates and displays air–fuel ratio for combustion efficiency analysis.
- Strong Anti-Interference: Resistant to moisture and complex environments, ensuring stable and reliable results.
- Durable Design: Multi-stage filtration protects core components, extending service life.
- Advanced Algorithms: Supports linear correction with automatic temperature and pressure compensation.
- Expandable Interfaces: Includes ports for oil temperature and engine speed to enable more comprehensive analysis.
Applications
- Gasoline Vehicle Emission Testing: Suitable for emission testing under various operating conditions, meeting GB 18285-2018 and related standards.
- Environmental Monitoring & Compliance: Widely used by regulatory agencies, inspection stations, and enforcement bodies for emission supervision.
- Automotive R&D and Manufacturing: Supports emission performance testing during vehicle and engine development and production.
- Vehicle Emission Management: Applied in routine emission monitoring and management using standardized testing methods to assess environmental performance.
| Parameter | Description |
| Gas Types | HC, CO, CO2, NO, NO2, O2 |
| Measurement Range | HC: (0~2000)×10⁻⁶VOL, (2001~5000)×10⁻⁶VOL, (5001~9999)×10⁻⁶VOL<br>CO: (0.00~10.00)×10⁻²VOL, (10.01~14.00)×10⁻²VOL<br>CO2: (0.0~16.0)×10⁻²VOL, (16.01~18.0)×10⁻²VOL<br>NO: (0~4000)×10⁻⁶VOL, (4001~5000)×10⁻⁶VOL<br>NO2: (0~1000)×10⁻⁶VOL |
| O2: (0.0~25.0)×10⁻²VOL | |
| Absolute Error | HC: ±4×10⁻⁶VOL |
| CO: ±0.02×10⁻²VOL | |
| CO2: ±0.3×10⁻²VOL | |
| NO: ±25×10⁻⁶VOL | |
| NO2: ±25×10⁻⁶VOL | |
| O2: ±0.1×10⁻²VOL | |
| Relative Error | HC: ±3%, ±5%, ±10% |
| CO: ±3%, ±5% | |
| CO2: ±3%, ±5% | |
| NO: ±4%, ±8% | |
| NO2: ±4% | |
| O2: ±5% | |
| Resolution | NO/NO2: 1ppm; CO2: 0.01% |
| Response Time | HC/CO/CO2: T90≤8s; NO/NO2: T90≤10s; O2: T90≤12s |
| Warm-up Time | 30 minutes |
| Communication | RS-485/RS-232 |
| Power Supply | 100~240VAC, 150W |
