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Custom NOx Sensor Manufacturers
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Automotive Sensor Industrial Field

NOx Sensor

Our NOx sensors are specifically designed for modern internal combustion engines and hybrid vehicles, enabling real-time monitoring of NOx concentrations in exhaust gases to ensure compliance with stringent global emission standards such as Euro 6. As a self-owned manufacturing facility, we offer end-to-end control from research and development to production and testing, delivering highly reliable and cost-effective solutions to customers.

Range NOx: 0~1500ppm, O₂: 12%~21%
Accuracy NOx 0~100ppm: ±10ppm
100~500ppm: ±10%
500~1500ppm: ±15%
Accuracy O₂ 0%~5%: ±0.25%
5%~21%: ±5%
Response Time t₁₀↔90% λlin < 4900ms
t₁₀↔90% NOx < 5300ms
Power Supply 12V, 24V
Light Off Time 120s (Devpoint to status byte OK)
Design Life Time 6000h or 350,000km
Sensor Cable Length 415mm, 615mm, 915mm
Exhaust Temperature 800°C
Wire Temperature 200°C
Cross Sensitivity NO₂, NH₃, Pressure
Certificate

Specializing in the research and development of intelligent vehicle exhaust temperature sensor, intelligent NOX sensor, NH3 sensor, H2 sensor and speed sensor, design, production, sales and integration.

ABOUT US
Sook High Tech (Jiangsu) Co., Ltd.

SOOK High Tech (Jiangsu) Co., LTD. was established in 2015, with a registered capital of 30.5 million yuan. Has won High-tech enterprise, National science and technology small and medium-sized enterprise, Software enterprise, Member of China Machinery Industry Standardization Technology Association, Council Members of Sensor and IoT Industry Association, Council Members of China Instrument Industry Association Sensor Branch and Council Members of Jiangsu Import and Export Chamber of Commerce. As a professional China OEM/ODM NOx sensor manufactures and wholesale NOx sensor company , SOOK High Tech focuses on the design, production, sales and integration of various sensors for smart cars and industrial fields, as well as cables and heaters for the industrial field. Has an annual production capacity of 600,000 sensors of various types. There are more than 2,000 items of exhaust temperature sensors, 450 items of NOx sensors, and 1,300 items of ABS sensor, which are exported to Europe and the United States.

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NOx Sensor Industry knowledge

What reset or learning steps are required after replacing a NOx sensor?
1. Clear fault codes and perform a system reset
After replacing a sensor, first use a professional diagnostic tool to read and clear the existing NOx sensor fault codes to ensure the ECU can receive the new sensor's signal.

2. Perform the sensor calibration (learning) procedure
Use the diagnostic tool to access the calibration menu of the emission control system and perform "sensor learning" or "adaptation" according to the manufacturer's instructions. This will allow the ECU to quickly establish a baseline NOx concentration under different operating conditions.

3. Conduct a road test to verify
After completing the reset and learning process, conduct a road test of at least 10 km to monitor exhaust NOx data for stability and confirm that the sensor response time (<1400ms) meets specifications.

4. Recheck the electrical connections
After the road test, recheck the tightness of the sensor connector, wiring harness, and heater circuit to prevent loosening caused by vibration from triggering the fault again.
Why does carbon deposits/soot cause NOx sensor failure? 1. Probe Surface Contamination
After long-term operation, carbon residue and soot in the exhaust gas can deposit on the sensor probe surface, preventing direct gas contact with the sensor element and causing signal attenuation or distortion.

2. Intake Passage Blockage
Carbon deposits can block the sensor's air inlet, reducing airflow and increasing sensor response time, even leading to zero readings.

3. Chemical Corrosion and Electrode Aging
Sulfides and metal particles contained in soot can corrode the electrodes of electrochemical NOx sensors, accelerating component aging and leading to sensor failure.

4. Poor Heat Dissipation
The carbon layer can reduce the sensor's heat dissipation efficiency, causing the operating temperature to rise abnormally, further accelerating the aging and failure of the sensor's internal materials.