Wobo Industrial Equipment Co., Ltd.
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Product Overview
The Automotive Exhaust Gas Analyzer for gasoline vehicles is a professional, high-precision instrument designed for measuring exhaust emissions from gasoline engines.
It combines micro-flow infrared dual-chamber sensor technology with 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 (AFR) calculation and display, providing reliable data for evaluating engine combustion performance and emission characteristics. It complies with GB 18285-2018 and JJG 688-2017 standards, achieving Class 0.0 accuracy, making it suitable for high-precision emission testing applications.
Working Principle
The analyzer integrates multiple advanced sensing technologies for comprehensive gas analysis.
NO is measured using a micro-flow infrared dual-chamber sensor, where a dual-cell structure and specific optical filters compare infrared absorption signals, minimizing the effects of temperature fluctuations and sensor aging.
HC, CO, and CO₂ are measured using non-dispersive infrared (NDIR) technology, based on the selective absorption of specific infrared wavelengths by different gases.
NO₂ is measured directly using non-dispersive ultraviolet (NDUV) absorption, eliminating the need for an NOx converter.
O₂ is measured using an electrochemical sensor, where gas reactions generate corresponding electrical signals.
The system incorporates multi-stage filtration and advanced algorithms for signal linearization, along with automatic temperature and pressure compensation to ensure high accuracy and stability. It also calculates the air-fuel ratio automatically for comprehensive emission analysis.
Key Features
- High-Precision NO Measurement: Micro-flow infrared dual-chamber sensor ensures accurate and stable long-term monitoring.
- Direct NO & NO₂ Detection: Eliminates the need for an NOx converter, improving efficiency and reducing maintenance.
- Multi-Gas Analysis: Combines NDIR and electrochemical technologies to simultaneously measure HC, CO, CO₂, and O₂.
- Air-Fuel Ratio Calculation: Automatically calculates and displays AFR for combustion performance evaluation.
- Strong Anti-Interference Capability: Resistant to moisture and complex environmental conditions, ensuring reliable results.
- Multi-Stage Filtration System: Protects core components and extends service life.
- Advanced Algorithms: Supports linear correction and automatic temperature and pressure compensation.
- Expandable Interfaces: Includes ports for oil temperature and engine speed, enabling extended measurement capabilities.
Applications
- Vehicle Emission Testing: Suitable for exhaust testing of gasoline vehicles under various operating conditions, meeting standards such as GB 18285-2018.
- Environmental Monitoring & Compliance: Widely used by environmental agencies, inspection stations, and regulatory bodies for emission compliance checks.
- Automotive R&D and Manufacturing: Supports emission performance testing during vehicle and engine development and production.
- Vehicle Emission Supervision: Applied in routine inspection and management of vehicle emissions to evaluate environmental performance.
| Gas Type | Measurement Range | Resolution | Absolute Error | Relative Error |
| Flow | (4～12) m³/min | 0.01 m³/min | —— | ±4% (F•S) |
| O₂ | (0.3～25)×10⁻² | 0.1×10⁻² | ±0.1×10⁻² | ±5% |
| Temperature | -30℃～150℃ | 0.1 ℃ | ±1 ℃ | —— |
| Pressure | 70.0kPa～110.0kPa | 0.1 kPa | ±0.5 kPa | ±3% |
| Zero/Span Drift | O₂: ±2.5% F.S. | |||
| Repeatability | Flow: ±2% F.S.; O₂: Relative standard deviation ≤1.5% | |||
| Response Time | O₂: 5s | |||
| Warm-up Time | <3 min | |||
| Relative Humidity | 0~95% | |||
| Power Supply | AC220V±10%, 50 Hz±1Hz | |||
