News Details

Home > News >

Company news about Is a NOx sensor the same as a PM sensor?

Events

Cases

Mrs. April

Sales@wegoparts.com

86-18100162701

Contact Now

Is a NOx sensor the same as a PM sensor?

2026-06-18

NOx sensors and PM sensors are distinct types of sensors, differing significantly in their core functions and the substances they monitor.

I. NOx Sensor
Its primary function is to measure the concentration of various nitrogen oxides (NOx) in exhaust gas. It provides data to the engine ECU to determine whether emissions meet regulatory standards and to precisely control urea injection in the SCR system; it is a critical component for enabling diesel vehicles to comply with emission regulations such as China IV and China V.

Key Functions

Emissions Monitoring: Detects harmful NOx gases in the tailpipe.
SCR Optimization: Sends real-time data to the engine computer so it can inject the precise amount of AdBlue/DEF required to neutralize emissions.

Common Symptoms of a Faulty Sensor

Check Engine Light (CEL): The most common indicator, often accompanied by specific diagnostic trouble codes (e.g., P2200-P2209).
Poor Fuel Economy: The computer may alter the air-fuel mixture if the sensor gives incorrect readings.
Engine Derating: On diesel trucks, a failed sensor can trigger a "limp mode" or restrict top speed to prevent further emissions.
Rough Idling or Hesitation: Unstable engine performance due to incorrect exhaust data

II. PM Sensor
It is primarily used to monitor the concentration of particulate matter (PM) in exhaust gas or ambient air. In vehicles, it is typically installed at the outlet of the DPF (Diesel Particulate Filter) and serves as the final line of monitoring to ensure that vehicle particulate emissions comply with standards.

How They Work

Most PM sensors used in consumer electronics, smart home devices, and environmental monitoring rely on an optical method called laser scattering.

News Details

Home > News >

Company news about-Is a NOx sensor the same as a PM sensor?

Events

News

Cases

Is a NOx sensor the same as a PM sensor?

2026-06-18

NOx sensors and PM sensors are distinct types of sensors, differing significantly in their core functions and the substances they monitor.

Key Functions

Emissions Monitoring: Detects harmful NOx gases in the tailpipe.
SCR Optimization: Sends real-time data to the engine computer so it can inject the precise amount of AdBlue/DEF required to neutralize emissions.

Common Symptoms of a Faulty Sensor

Check Engine Light (CEL): The most common indicator, often accompanied by specific diagnostic trouble codes (e.g., P2200-P2209).
Poor Fuel Economy: The computer may alter the air-fuel mixture if the sensor gives incorrect readings.
Engine Derating: On diesel trucks, a failed sensor can trigger a "limp mode" or restrict top speed to prevent further emissions.
Rough Idling or Hesitation: Unstable engine performance due to incorrect exhaust data

How They Work

Most PM sensors used in consumer electronics, smart home devices, and environmental monitoring rely on an optical method called laser scattering.

Engine NOx Sensor

Car NOx Sensor

Nitrogen Oxide NOx Sensor

Truck Blower Motor

Urea Doser Pump

DEF Sensor

PM Sensor

Truck ABS Sensor

Exhaust Temperature Sensor

Crankshaft Position Sensor

Truck Pressure Sensor

Power Window Switch

VGT turbo actuator

Engine NOx Sensor

Car NOx Sensor

Nitrogen Oxide NOx Sensor

Truck Blower Motor

Urea Doser Pump

DEF Sensor

PM Sensor

Truck ABS Sensor

Exhaust Temperature Sensor

Crankshaft Position Sensor

Truck Pressure Sensor

Power Window Switch

VGT turbo actuator

News Details

Company news about Is a NOx sensor the same as a PM sensor?

News

Cases

Is a NOx sensor the same as a PM sensor?

Company news about-Is a NOx sensor the same as a PM sensor?

News

Cases

Is a NOx sensor the same as a PM sensor?