Wobo Industrial Equipment Co., Ltd.
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Product Overview
The diesel vehicle emissions gas analyzer is a high-precision instrument specifically designed for measuring exhaust emissions from diesel engines. It uses micro-flow infrared dual-chamber sensor technology, combined with non-dispersive ultraviolet (NDUV) and non-dispersive infrared (NDIR) methods, to accurately measure key gases such as NO, NO₂, and CO₂.
The system complies with the Chinese standards GB 3847-2018 (Limits and Measurement Methods for Diesel Vehicle Emissions) and JJG 688-2017 (Verification Regulation for Vehicle Emission Gas Analyzers). It offers high accuracy, low maintenance, and excellent stability, meeting the strict requirements of diesel emission testing and environmental regulation.
Working Principle
The analyzer integrates multiple detection technologies for precise multi-gas analysis.
NO is measured using a micro-flow infrared dual-chamber sensor, where a dual-cell structure and optical filtering compare infrared absorption signals to minimize the effects of temperature fluctuations and sensor aging.
NO₂ is measured directly using the non-dispersive ultraviolet (NDUV) absorption method, eliminating the need for a NOx converter and simplifying the system.
CO₂ is measured using non-dispersive infrared (NDIR) absorption, where gas concentration is determined by the degree of infrared light absorption.
Advanced algorithms perform linear correction of the signals, while multi-stage processing enhances overall measurement accuracy and stability.
Key Features
- High Precision & Stability: Micro-flow infrared dual-chamber sensor technology ensures accurate and stable long-term performance.
- Direct NO₂ Measurement: NDUV technology allows direct NO₂ detection without a NOx converter, reducing system complexity and maintenance costs.
- Multi-Gas Detection: Combines NDIR and NDUV technologies for accurate simultaneous measurement of key gases.
- Strong Anti-Interference Capability: Resistant to moisture and complex operating conditions, ensuring reliable results.
- Extended Functionality: Supports connection to an opacity meter for simultaneous measurement of exhaust opacity, enabling more comprehensive emission evaluation.
- Advanced Signal Processing: Built-in high-precision algorithms with linear correction; includes interfaces for oil temperature and engine speed inputs.
- Robust Design: Durable structure suitable for continuous operation and various application environments.
Applications
- Diesel Vehicle Emission Testing: Suitable for all types of diesel vehicles, meeting GB 3847-2018 and other regulatory requirements with accurate emission data.
- Environmental Compliance Monitoring: Widely used by environmental agencies, inspection stations, and enforcement bodies for regulatory supervision.
- Automotive R&D and Manufacturing: Supports emission performance evaluation during vehicle development and production, enabling optimization and upgrades.
- Emission Compliance Verification: Used for pre-sale and post-sale emission testing to ensure regulatory compliance and reduce environmental risks.
| Parameter | Description |
| Gas Types | CO2, NO, NO2 |
| Measurement Range | CO2: (0.0~16.0)×10⁻²VOL, (16.01~18.0)×10⁻²VOL |
| NO: (0~4000)×10⁻⁶VOL, (4001~5000)×10⁻⁶VOL | |
| NO2: (0~1000)×10⁻⁶VOL | |
| Absolute Error | CO2: ±0.3×10⁻²VOL |
| NO: ±25×10⁻⁶VOL | |
| NO2: ±25×10⁻⁶VOL | |
| Relative Error | CO2: ±3% |
| NO: ±4% | |
| NO2: ±4% | |
| Resolution | NO/NO2: 1ppm; CO2: 0.01% |
| Response Time | CO2: T90≤8s; NO/NO2: T90≤10s |
| Warm-up Time | 30 minutes |
| Communication | RS-485/RS-232 |
| Power Supply | 100~240VAC, 150W |
