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The DEF (Diesel Exhaust Fluid) Sensor is an essential component in modern diesel vehicles' exhaust after - treatment systems. As diesel engines are widely used for their efficiency and torque, but also emit harmful pollutants like nitrogen oxides (NOx) and particulate matter (PM), meeting strict emissions regulations has become a top priority. The DEF sensor plays a crucial role in the Selective Catalytic Reduction (SCR) system by accurately measuring the level and concentration of urea - based diesel exhaust fluid (DEF), also known as AdBlue.
• Multiple Sensing Technologies: Our DEF sensor utilizes a combination of temperature, pressure, conductivity, and ultrasonic wave technologies to precisely determine the DEF concentration. For example, the temperature - compensated conductive sensor measures the electrical conductivity of the DEF solution. Since pure water has low conductivity and urea has high conductivity, this technology can accurately calculate the urea content in the DEF.
• Reliable Level Detection: It can accurately detect the level of DEF in the tank. This is important to ensure that there is an adequate supply of DEF for the SCR system to function properly. The sensor provides real - time data on the DEF level to the engine control module (ECM).
• Durable Construction: Built to withstand the harsh environment within the DEF tank, which may include exposure to chemicals and temperature variations. The sensor housing is made of corrosion - resistant materials, ensuring a long service life.
• Optimal NOx Reduction: By accurately measuring the DEF concentration and level, the sensor enables the ECM to adjust the dosage of DEF injected into the SCR system. This ensures that the ideal ratio of DEF to diesel fuel is maintained, resulting in efficient reduction of NOx emissions. NOx is converted into safe water and nitrogen vapor in the SCR system, helping diesel vehicles meet strict emissions standards.
• Preventive Maintenance: The reliable level detection feature of the sensor allows vehicle operators to plan for DEF refills in advance. This helps in preventing situations where the DEF tank runs dry, which could lead to reduced engine performance, increased emissions, and potential damage to the SCR system.
• Cost - Effective Operation: Proper control of DEF dosage through the sensor ensures that the SCR system operates efficiently. This reduces the unnecessary consumption of DEF, saving costs for vehicle owners and operators in the long term.
• Heavy - Duty Trucks: In long - haul and vocational trucks, the DEF sensor is crucial for maintaining compliance with emissions regulations. These trucks cover long distances and operate under various conditions, and the DEF sensor helps in ensuring that the SCR system functions optimally throughout the journey.
• Buses: School buses, city buses, and inter - city coaches all rely on diesel engines. The DEF sensor in these buses ensures that the exhaust emissions are kept to a minimum, providing a cleaner environment for passengers and the communities they serve.
• Construction and Agricultural Equipment: Heavy - duty construction machinery like bulldozers, excavators, and agricultural tractors often use diesel engines. The DEF sensor in this equipment helps in reducing emissions during operation, which is not only beneficial for environmental protection but also for meeting the emissions requirements in work zones.
Product Parameters
Technical temperature | -40-85℃ |
Operating Voltage | 7-36V |
Protection class | IP6K9K |
Output signal | CAN-J1939 |
Quantity transfer cycle | 1S |
Corresponding time | <3S |
Concentration detection range | 0~50% |
Concentration detection accuracy | 25%≤DEF%≤36%and -7℃≤T≤60℃condition ±1%deviation; other conditions, ±2% deviation |
Temperature detection range | -40~85℃ |
Temperature detection accuracy | ±1℃ |
Liquid level detection range | It can be calibrated to adapt to users of different sizes of DEF tanks |
Liquid level detection accuracy | Dry spring type, single point accuracy ±5mm |
The DEF (Diesel Exhaust Fluid) Sensor is an essential component in modern diesel vehicles' exhaust after - treatment systems. As diesel engines are widely used for their efficiency and torque, but also emit harmful pollutants like nitrogen oxides (NOx) and particulate matter (PM), meeting strict emissions regulations has become a top priority. The DEF sensor plays a crucial role in the Selective Catalytic Reduction (SCR) system by accurately measuring the level and concentration of urea - based diesel exhaust fluid (DEF), also known as AdBlue.
• Multiple Sensing Technologies: Our DEF sensor utilizes a combination of temperature, pressure, conductivity, and ultrasonic wave technologies to precisely determine the DEF concentration. For example, the temperature - compensated conductive sensor measures the electrical conductivity of the DEF solution. Since pure water has low conductivity and urea has high conductivity, this technology can accurately calculate the urea content in the DEF.
• Reliable Level Detection: It can accurately detect the level of DEF in the tank. This is important to ensure that there is an adequate supply of DEF for the SCR system to function properly. The sensor provides real - time data on the DEF level to the engine control module (ECM).
• Durable Construction: Built to withstand the harsh environment within the DEF tank, which may include exposure to chemicals and temperature variations. The sensor housing is made of corrosion - resistant materials, ensuring a long service life.
• Optimal NOx Reduction: By accurately measuring the DEF concentration and level, the sensor enables the ECM to adjust the dosage of DEF injected into the SCR system. This ensures that the ideal ratio of DEF to diesel fuel is maintained, resulting in efficient reduction of NOx emissions. NOx is converted into safe water and nitrogen vapor in the SCR system, helping diesel vehicles meet strict emissions standards.
• Preventive Maintenance: The reliable level detection feature of the sensor allows vehicle operators to plan for DEF refills in advance. This helps in preventing situations where the DEF tank runs dry, which could lead to reduced engine performance, increased emissions, and potential damage to the SCR system.
• Cost - Effective Operation: Proper control of DEF dosage through the sensor ensures that the SCR system operates efficiently. This reduces the unnecessary consumption of DEF, saving costs for vehicle owners and operators in the long term.
• Heavy - Duty Trucks: In long - haul and vocational trucks, the DEF sensor is crucial for maintaining compliance with emissions regulations. These trucks cover long distances and operate under various conditions, and the DEF sensor helps in ensuring that the SCR system functions optimally throughout the journey.
• Buses: School buses, city buses, and inter - city coaches all rely on diesel engines. The DEF sensor in these buses ensures that the exhaust emissions are kept to a minimum, providing a cleaner environment for passengers and the communities they serve.
• Construction and Agricultural Equipment: Heavy - duty construction machinery like bulldozers, excavators, and agricultural tractors often use diesel engines. The DEF sensor in this equipment helps in reducing emissions during operation, which is not only beneficial for environmental protection but also for meeting the emissions requirements in work zones.
Product Parameters
Technical temperature | -40-85℃ |
Operating Voltage | 7-36V |
Protection class | IP6K9K |
Output signal | CAN-J1939 |
Quantity transfer cycle | 1S |
Corresponding time | <3S |
Concentration detection range | 0~50% |
Concentration detection accuracy | 25%≤DEF%≤36%and -7℃≤T≤60℃condition ±1%deviation; other conditions, ±2% deviation |
Temperature detection range | -40~85℃ |
Temperature detection accuracy | ±1℃ |
Liquid level detection range | It can be calibrated to adapt to users of different sizes of DEF tanks |
Liquid level detection accuracy | Dry spring type, single point accuracy ±5mm |
