Home » Products » NOx Sensor » High-Precision NOx Sensor for Heavy-Duty Diesel Engines (5WK9 7366)
Features of NOx Sensor-5WK9 7366
Features of NOx Sensor-5WK9 7366 Features of NOx Sensor-5WK9 7366
Features of NOx Sensor-5WK9 7366 Features of NOx Sensor-5WK9 7366
Features of NOx Sensor-5WK9 7366 Features of NOx Sensor-5WK9 7366

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High-Precision NOx Sensor for Heavy-Duty Diesel Engines (5WK9 7366)

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The High-Precision NOx Sensor (5WK9 7366) is a state-of-the-art emission control solution designed for heavy-duty diesel engines, delivering accurate nitrogen oxide (NOx) measurement to comply with strict global emissions standards like Euro 6 and EPA 2021.
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Overview


Engineered with planar zirconia technology and a dual-band sensor design, this sensor provides real-time NOx concentration data (0-5,000 ppm) with ±2% measurement accuracy, enabling precise feedback for exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) systems. The rugged stainless steel housing and high-temperature resistance (up to 850°C) make it ideal for harsh operating environments in commercial vehicles and industrial engines.


Features


Advanced Sensing Technology

Dual-Band Measurement: Simultaneously monitors NO and NO₂ concentrations, providing comprehensive NOx speciation for optimized aftertreatment control.

Planar Zirconia Element: Reduces response time to <200ms (90% step change), enabling faster feedback to the engine control unit (ECU) compared to traditional sensors.


Durability & Environmental Resilience

High-Temperature Resistance: Operates reliably in exhaust temperatures up to 850°C, with a thermal shock tolerance of 500°C/sec to withstand rapid engine load changes.

Corrosion Protection: Gold-plated electrodes and PTFE-coated wiring harness resist sulfur and ammonium sulfate poisoning, extending service life by 30% in high-sulfur fuel applications.


Plug-and-Play Integration

Universal Compatibility: Standard OBD-II connector and CAN protocol (ISO 15118) ensure seamless integration with major ECU brands (Bosch, Delphi, Denso).

Self-Diagnostic Function: Built-in error codes (DTCs) for sensor drift and contamination, reducing diagnostic time by 40%.


Emissions Compliance

Wide Measurement Range: 0-5,000 ppm NOx (NO+NO₂), compliant with Euro 6d-TEMP and CARB HD-OBD requirements for heavy-duty engines.

Low Power Consumption: 12V operation with <2W standby power, suitable for hybrid and electric auxiliary power units (APUs).


Application


Commercial Vehicles:

Trucks (Class 8 tractors, delivery fleets): Ensures SCR system efficiency in long-haul and urban delivery applications.

Buses (city transit, coaches): Maintains NOx emissions below 0.4g/kWh in Euro 6-compliant diesel engines.

Industrial Engines:

Generator sets (100-2,000 kVA): Monitors NOx in standby and prime power applications for ISO 8528 compliance.

Construction machinery (excavators, bulldozers): Withstands vibration (5-200Hz, 20g) and dust in off-highway environments.

Marine Applications:

Auxiliary engines (IMO Tier III compliance): Accurate NOx measurement in marine diesel engines operating in Emission Control Areas (ECAs).


FAQ


Q: Is the 5WK9 7366 compatible with biodiesel fuels?

A: Yes, the sensor is validated for use with B20 biodiesel (20% biofuel blend), with no performance degradation in oxygenated fuels.

Q: What is the recommended replacement interval?

A: Service life is 500,000 km or 8,000 hours under normal operating conditions—refer to OEM maintenance schedules for harsh environments.

Q: Can it be used in gasoline engines?

A: Optimized for diesel engines; for gasoline applications, consider our 5WK9 6621K model with gasoline-specific calibration.

Q: How is sensor drift corrected?

A: The ECU performs periodic self-calibration using ambient air reference, ensuring accuracy over the sensor’s lifetime without manual adjustment.


Nox Detection Range

0~2500ppm O2:-12%~21%

Nox Accuracy

0~100ppm: ±10ppm;100~500ppm: ±10%;
500~1500ppm: ±15%;1500~2500ppm: ±30%

O2 Accuracy

0%~5%: ±0.25%;5%~21%: ±5%

Light-off Time

Can reach detection state in 160s

Response Time

T(10-90%): Nox<5300ms T(10-90%):O2-4900ms

Supply Voltage

12V,24V in universal version

Design Life

6000h or 350000km


NOx Sensor NOx Sensor NOx Sensor



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Zhejiang Kreation Electronic Technology Co.,Ltd. is a smart sensor company invested and founded by E-Quality intelligent Technology Co., Ltd. (E-Quality for short).

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