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The 5WK9 6642B NOx sensor is designed for diesel exhaust aftertreatment systems that require continuous NOx monitoring and stable signal transmission. It supports emission control performance under demanding operating conditions, and is suitable for replacement and integration in heavy-duty vehicle exhaust applications. This model is applicable for OEM matching projects and aftermarket replacement procurement.
As global emission regulations become stricter, this sensor supports industrial clients in balancing operational efficiency with emission compliance. It adopts electrochemical sensing principles to provide real-time NOx concentration data, which assists in optimizing combustion and DEF injection processes, and supports compliance with international emission standards. Its structural design adapts to harsh operating environments, covering automotive, industrial and marine emission control scenarios.
The sensor adopts yttria-stabilized zirconia (YSZ) ceramic electrolyte as the core sensing material, which generates ionic conductivity under high temperature conditions. NOx-sensitive electrodes on the sensor surface react with NOx molecules, generating electrical signals proportional to NOx concentration. An independent oxygen reference chamber ensures accurate differentiation between NOx and residual oxygen in exhaust gas, reducing cross-interference of gas components.
The sensor supports dual-position installation for pre-SCR and post-SCR positions. The pre-SCR installation measures raw exhaust NOx and oxygen levels to support precise urea injection control, while the post-SCR installation monitors treated NOx levels to evaluate SCR conversion efficiency and support on-board diagnostic functions.
The electronic module of the sensor operates within a temperature range of -40°C to 125°C, adapting to cold start and high-temperature operating environments. The sensing element is designed to withstand instantaneous exhaust temperatures of up to 900°C, with thermal shock resistance to adapt to fluctuating exhaust temperature conditions in heavy-duty operating scenarios.
The sensor supports CAN Bus, Analog and PWM output protocols, and is equipped with a standardized M12 connector. This design allows seamless integration with different engine control systems, reducing adaptation workload for system integration and replacement projects.
The sensor features a stainless steel housing and alumina ceramic sensing elements, which provide resistance to corrosion, abrasion and chemical exposure from exhaust components. This structural design adapts to harsh exhaust environments with particulate matter and corrosive gas components.
Under laboratory continuous operation test conditions, the sensor has a design service life of over 50,000 hours. This design reduces replacement frequency for long-term operating equipment, and supports lower total cost of ownership for fleet and industrial power systems.
The sensor is equipped with an integrated self-cleaning mechanism to reduce soot accumulation on the sensing element surface. This structure reduces maintenance frequency in high-particulate exhaust environments, and lowers equipment downtime caused by sensor maintenance.
The sensor is certified to meet Euro 6, EPA Tier 4 and China VI emission standards, and adapts to IMO Tier III requirements for marine applications. This compliance supports cross-regional market application for vehicle and equipment manufacturers, and reduces regulatory compliance risks for commercial operations.
Item | Specification |
|---|---|
Model | 5WK9 6642B |
Sensing Principle | Electrochemical detection with YSZ ceramic electrolyte |
Electronic Module Operating Temperature | -40°C to 125°C |
Sensing Element Instantaneous Temperature Resistance | Up to 900°C |
NO Measurement Precision (Lab Test Condition) | ±2% for NO and NO2 |
Response Time | 90% of reading within 3 seconds |
Housing Material | Stainless steel |
Sensing Element Material | Alumina ceramic |
Output Protocols | CAN Bus, Analog, PWM |
Connector Type | Standardized M12 connector |
Emission Compliance | Euro 6, EPA Tier 4, China VI, IMO Tier III |
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The sensor applies to diesel engines in trucks, buses and construction machinery, supporting real-time exhaust gas recirculation and SCR injection control. It adapts to long-haul and heavy-load operating conditions for commercial vehicles.
For industrial boilers, gas turbines and furnaces in manufacturing plants, the sensor supports flue gas NOx monitoring. It assists in adjusting combustion parameters to maintain compliant exhaust emission levels for stationary industrial facilities.
The sensor adapts to marine propulsion systems and auxiliary engines, supporting compliance with IMO Tier III emission regulations for inland and marine vessel applications.
The sensor can be used in emission testing laboratories for calibration and verification of portable emission measurement systems, supporting stable data output for testing scenarios.
This sensor supports three output protocols: CAN Bus, Analog and PWM. It is equipped with a standardized M12 connector for system integration and replacement.
The sensor complies with Euro 6, EPA Tier 4 and China VI emission standards for automotive applications, and adapts to IMO Tier III requirements for marine engine scenarios.
Yes, this sensor can be applied to marine propulsion systems and auxiliary engines, and supports compliance with IMO Tier III emission regulations for vessel operations.
