Nitrogen Oxides (NxOx) Gas Sensors
Description
Nitrogen Oxides (NxOx) gas sensors are devices designed to detect and measure the concentration of nitrogen oxides in the environment. These sensors are capable of differentiating between various nitrogen oxide gases, such as nitrogen oxide (NO) and nitrogen dioxide (NO2), providing critical data for monitoring air quality and emissions.
Working Principle
Nitrogen Oxides gas sensors typically operate using semiconductor technology, where the presence of nitrogen oxides causes a change in the electrical resistance of the sensor material. This change is detected and measured, allowing for the quantification of gas concentration. The sensors are useful because they provide real-time monitoring of nitrogen oxides, which are significant pollutants contributing to environmental and health issues.
Applications
Nitrogen Oxides gas sensors are used in a variety of applications. They are crucial in monitoring vehicle emissions, particularly in automotive exhaust systems, to ensure compliance with environmental regulations. Additionally, they are employed in industrial settings to monitor emissions from manufacturing processes and in urban environments to assess air quality.
Advantages over other Gas Sensors
One of the advantages of Nitrogen Oxides gas sensors, particularly those using gallium nitride, is their high thermal and chemical stability, which allows them to operate effectively in harsh environments. Their small size enables the integration of multiple sensors on a single device, facilitating the simultaneous detection of various gases, which is not always possible with other sensor types.
Limitations
A limitation of some Nitrogen Oxides gas sensors, especially those based on metal oxide semiconductors, is the requirement for high operating temperatures, which can increase energy consumption and limit their use in certain applications. Additionally, the presence of other gases can sometimes interfere with the sensor's accuracy, necessitating careful calibration and potentially limiting their selectivity.
Considerations
When selecting Nitrogen Oxides gas sensors, it is important to consider factors such as initial costs, which can vary depending on the technology used. Operating expenses may include energy consumption, particularly for sensors requiring high temperatures. Durability and accuracy are critical, as sensors must withstand environmental conditions while providing reliable data. Replacement and maintenance costs should also be evaluated, as these can impact the long-term viability of the sensor system.
from ABB Measurement & Analytics
The Advance Optima process gas analyzers have a modular design that offers a long-term security in your investment. Analyzer modules can be freely combined into tailor-made solutions and upgraded or extended with new features at any time. Remote modules are easily attached and centrally operated. [See More]
- Gas Types: CO2 (0-5/50 ppm); CO (0-10/50 ppm); Hydrocarbons (0-50/100/200/250/500 ppm); Methane (CH4) / Natural Gas (0-50/100 ppm); NO (0-75 ppm); NxOx (0-20/50 ppm); SO2 (0-25/100 ppm); SF6 (0-1900/2000 ppm); Water Vapor (0-500/1000 ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Electrochemical; Flame Ionization Detector
- Measurement Type: Trace
from ABB Measurement & Analytics
EasyLine is both a powerful and affordable line of instruments for the monitoring of gas concentrations in numerous applications. Up to two analyzer modules can be combined in one housing to measure up to five different gases continuously. The advantages to you – EasyLine offers: Proven... [See More]
- Gas Types: CO2 (0-100 ppm); CO (0-100 ppm); Methane (CH4) / Natural Gas (0-100 ppm); NO (0-150 ppm); NxOx (0-100 ppm); SO2 (0-100 ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Electrochemical; Flame Ionization Detector; PID
- Measurement Type: %Volume; Trace
from ABB Measurement & Analytics
The specialists for hazardous locations. The EL3060 series is compactly built and especially designed for hazardous areas. The gas analyzer is made up of the flameproof enclosed control unit which can also contain one analyzer. The infrared photometer is built into a separate flameproof enclosure... [See More]
- Gas Types: NH3 (0-30/500 ppm); CO2 (0-5/50 ppm); CO (0-10/50 ppm); Hydrocarbons (0-50/100/200/250/500 ppm); Methane (CH4) / Natural Gas (0-50/100 ppm); NO (0-75/150 ppm); NxOx (0-20/50 ppm); SO2 (0-25/100 ppm); SF6 (0-1900/2000 ppm); Water Vapor (0-500/1000 ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Infrared; PID
- Measurement Type: %Volume; Trace
from Terra Universal, Inc.
Complete, easy-to-use sampling and analysis system. Detects and measures hazardous gases and vapors. Certified by the Safety Equipment Institute (SEI). Ideal for monitoring performance of Terra Exhaust Purification Filters. The most cost effective solution to air sampling and analysis. This Toxic... [See More]
- Gas Types: Toxic; NO2 (10 to 300 PPM); NxOx (10 to 300 PPM)
- Number of Gases Monitored: Single
- Sensor Technology: Colorimetric Stain
- Measurement Type: Trace
from Emerson Automation Solutions – Rosemount
This multi-component QCL represents the next generation of gas analyzers and sensors, with the ability to measure up to 20 gases and an interchangeable modular configuration for up to 9 lasers. An embedded ARM processor gives fully autonomous intelligent operation. Key Features/Benefits: Measure up... [See More]
- Gas Types: Combustible; NH3 (0-4000 ppm); CO2 (0-30%); CO (0-20000 ppm); Hydrocarbons (0-200 ppm); HCl (0-2000 ppm); HF (0-50 ppm); H2S (0-50000 ppm); Methane (CH4) / Natural Gas (0-20000 ppm); NO (0-10000 ppm); NO2 (0-2000 ppm); NxOx (0-10000 ppm); O2 (0-100%); SO2 (0-4000 ppm); Water Vapor (0-40%) (Formaldehyde 0-100ppm, Hydrogen Peroxide 0-800ppm, Methanol 0-120 ppm, Nitromethane 0-120ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Infrared
- Measurement Type: %Volume; Trace
from FIS Inc.
SP Series - Nitrogen Oxides Environmental Monitoring Sensor [See More]
- Gas Types: Combustible; NxOx
from Sensidyne, LP
Detector tubes provide fast, economical monitoring for a wide variety of target gases and vapors. Their direct reading capability provides on-the-spot results eliminating laboratory turnaround time. The tubes are typically calibrated in one of three commonly used units of concentration. [See More]
- Gas Types: Toxic; Combustible; NO2 (1-40 ppm); NxOx (10-300 ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Electrochemical; Gas Chromatography
- Measurement Type: Trace
from Emerson Automation Solutions – Rosemount
This hybrid system is the most cost effective solution to meet the measurement needs in marine applications. Key Features/Benefits: Measure up to 10 gases simultaneously. Ambient environments of up to 70 °C (158 °F) and gas temperatures of 190 °C (374 °F). Single and dual path... [See More]
- Gas Types: Combustible; NH3 (0-4000 ppm); CO2 (0-30%); CO (0-20000 ppm); Hydrocarbons (0-200 ppm); Methane (CH4) / Natural Gas (0-20000 ppm); NO (0-10000 ppm); NO2 (0-2000 ppm); NxOx (0-10000 ppm); SO2 (0-4000 ppm); Water Vapor (0-40%) (Formaldehyde 0-100ppm, Hydrogen Peroxide 0-800ppm, Methanol 0-120 ppm, Nitromethane 0-120ppm)
- Number of Gases Monitored: Multi
- Sensor Technology: Infrared
- Measurement Type: %Volume; Trace