A nitrogen oxide sensor or NOx sensor is typically a high-temperature device built to detect nitrogen oxides in combustion environments such as an automobile, truck tailpipe or smokestack.

What does a NOx sensor do? The NOx sensor not only monitors the level of the oxides of nitrogen being released into the air, but it also plays an essential role in controlling it through the Selective Catalytic …

Jul 31, 2024 · The Nitrogen Oxide (NOx) sensor is strategically located in diesel-powered vehicles to monitor emissions. Usually integrated into the exhaust system, the NOx sensor measures the levels …

What is a NOx sensor? The NOx sensor is part of the SCR system made up of the sensor, SCR catalyst, DPF, turbocharger, and other components. The NOX sensor is located upstream of the …

Oct 30, 2025 · What Is a NOx Sensor? A NOx (nitrogen oxide) sensor measures the levels of nitrogen oxides—mainly nitrogen monoxide (NO) and nitrogen dioxide (NO₂)—in your exhaust system.

By recording exhaust measurement data, the NOx sensor enables the engine management system to provide an optimal dosage of AdBlue®, effectively reducing nitrogen oxides, which are harmful to the …

Jul 24, 2025 · A failed NOx sensor can quickly lead to increased fuel and DEF consumption, engine derates, and costly downtime. This guide provides a straightforward look at what these sensors do, …

May 20, 2024 · The primary function of a NOx sensor is to monitor the concentration of nitrogen oxides in a vehicle's exhaust stream. These sensors are strategically positioned within the exhaust system …

Nitrogen oxide sensors are a central sensor element in modern exhaust systems and make an important contribution to emission monitoring. They measure the oxygen content and NOx content in the …

Understand the complex technology behind NOx sensors, how they measure exhaust pollutants, and why they are vital for modern diesel emissions.