Chemiluminescence - Non-depleting sensing technology for NOx analysis

Used in our SERVOPRO NOx gas analyzer, Chemiluminescence sensing is a light-based technology ideal for the measurement of nitric oxide (NO), nitrogen dioxide (NO2) and total oxides of nitrogen (NOx) in a wide range of combustion and emissions monitoring applications.

Chemiluminescence detectors take advantage of nitric oxide (NO) and nitrogen dioxide (NO2) chemical reactions that emit light as part of that process. This is different from fluorescence or phosphorescence, in that the light produced stems from a chemical reaction rather than by the absorption of photons by the molecule.

Chemiluminescence analyzers use a thermally stabilized photodiode to measure the intensity of the light produced by the reaction of NO with ozone (O3). The intensity is directly proportional to the concentration of NO that was converted to NO2 by the reaction.

By converting the NO2 in the gas stream to NO, then reacting it with the O3, the total NOx value can be calculated, allowing speciation of NO, NO2 and total NOx with a single analyzer.

Related and alternative technologies

Chemiluminescence sensors can be used alongside Gfx, Infrared, Paramagnetic and Flame Ionization Detector technology to deliver a comprehensive continuous emissions monitoring (CEM) solution.

If the sample gas pressure varies, the amount of light emitted will be affected even if the NOx concentration remains stable. Pressure control of the sample gas is essential for accurate measurement by a Chemiluminescence sensor.

Key applications

Vehicle emissions testing

CEM

Combustion efficiency

DeNOx systems

Key benefits

Excellent trace analysis results

Rapid response time

Non-depleting technology – keeps cost of ownership low

Ideal for

Rapid-response applications such as vehicle and engine emissions certification testing, CEM, combustion efficiency, and process gas monitoring.

Explore the Chemiluminescence analyzers we have for your process

Learn more about all our gas analyzer solutions that use this sensor technology.

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4900 Multigas

SERVOPRO Safe Area

The 4900 Multigas is a high-performance CEMS analyzer designed for a wide range of multi-gas measurements.

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AquaXact 1688

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A rugged ultra-thin film Aluminum Oxide moisture sensor which measures moisture in a wide variety of gas phase process applications.

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AquaXact Controller

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Built specifically to work in harmony with the AquaXact 1688 ultra-thin film Aluminum Oxide moisture transmitter.

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Chroma

SERVOPRO Safe Area

The Chroma is optimized to specific background gases to ensure optimum performance for your application.

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DF-550E

SERVOPRO Safe Area

An ultra-trace Coulometric oxygen analyzer, the DF-550E is optimized for quality measurements in ultra-high-purity electronic gases.

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DF-560E

SERVOPRO Safe Area

The DF-560E provides the semiconductor industry with industry-best oxygen (O2) measurements for quality control in ultra-high-purity (UHP) electronic grade gas.

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DF-560E ULTRA

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A superior quality control solution for ultra-high-purity (UHP) electronic grade gases, the DF-560E Ultra delivers an industry-best detection of 45 parts per trillion for oxygen (O2).

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DF-730

SERVOPRO Safe Area

The DF-730 is an ultra-trace moisture analyzer that monitors the electronics-grade, high-purity hydrogen chloride (HCl) gas used in semiconductor fabs.

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DF-740

SERVOPRO Safe Area

A trace moisture analyzer using Tunable Diode Laser (TDL) sensing technology, the DF-740 is designed to measure contaminants in UHP-grade ammonia.

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DF-745

SERVOPRO Safe Area

The DF-745 delivers trace and ultra-trace measurements of moisture for ultra-high-purity (UHP) electronic gas checks in LED/LCD manufacturing processes.

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DF-745 SGMax

SERVOPRO Safe Area

The DF-745 SGMax is designed for the measurement of diverse gas mixtures in specialty gas blending applications.

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DF-750

SERVOPRO Safe Area

The DF-750 is a trace/ultra-trace moisture analyzer optimized for measurements in the ultra-high-purity (UHP) gases used in 300mm semiconductor fabs.

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DF-750 ULTRA

SERVOPRO Safe Area

Delivering industry-leading trace/ultra-trace moisture measurements, the DF-750 ULTRA is optimized for quality monitoring in the ultra-high-purity (UHP) gases used in 300mm semiconductor fabs.

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DF-760E

SERVOPRO Safe Area

Designed for quality control applications in UHP bulk gases, the compact DF-760E analyzer is a unique solution for the dual measurement of trace and ultra-trace moisture

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DF-760E ULTRA

SERVOPRO Safe Area

Designed for industry-leading quality control measurements in UHP bulk gases, the compact DF-760E ULTRA is a unique dual-analysis solution for trace and ultra-trace moisture and oxygen.

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FID

SERVOPRO Safe Area

With trace analysis capability, the FID is ideal for ASU safety and quality control applications.

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FluegasExact 2700

SERVOTOUGH Hazardous Area

Designed to measure O2 and COe in flue gases for improved combustion efficiency and reduced emissions.

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H2scan

SERVOTOUGH Hazardous Area

A solid-state, non-consumable sensor configured to operate in process gas streams. Provides a direct hydrogen measurement that is not cross-sensitive to other gases.

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HFID

SERVOPRO Safe Area

Utilizes an internally heated oven set to 190°C (374°F) to maintain the sample gas above its dew point, for optimum performance in total hydrocarbon analysis (THC).

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Laser 3 Plus Combustion

SERVOTOUGH Hazardous Area

Unmatched installation flexibility plus cost and performance benefits, ready for fast, accurate and responsive measurements in combustion and process control.

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Laser 3 Plus Environmental

SERVOTOUGH Hazardous Area

Compact, high-performance Tunable Diode Laser (TDL) analyzer, specifically optimized for ammonia slip measurement

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Laser 3 Plus Process

SERVOTOUGH Hazardous Area

Optimized for the fast, accurate and responsive measurement of process oxygen (O2) in hot or hazardous conditions.

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Micro i.s. 5100

SERVOFLEX Portables

Designed for the measurement of oxygen (O2) in potentially flammable gas samples. Certified to Zone 0 and Zone 1 and suitable for measuring percent levels of O2.

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MiniFoodpack 5200

SERVOFLEX Portables

A small sample volume portable benchtop analyzer focused on the checking and quality control of gas mixtures in Modified Atmosphere Packaging (MAP).

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MiniHD 5200

SERVOFLEX Portables

The MiniHD 5200 portable gas analyzer is a rugged, heavy duty analyzer designed to accurately measure the levels of O2, CO and CO2 within common gas mixtures.

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MiniMP 5200

SERVOFLEX Portables

The only truly portable battery-powered gas analyzer with MCERTS and TUV certification, offers single or dual measurement of oxygen (O2) and carbon dioxide (CO2).

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MonoExact DF150E

SERVOPRO Safe Area

The MonoExact DF150E combines the reliability of Servomex’s tried and tested Coulometric oxygen sensor with a more user-friendly package.

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MonoExact DF310E

SERVOPRO Safe Area

Designed specifically for accurate measurements of oxygen in industrial gas (IG) applications.

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MultiExact 4100

SERVOPRO Safe Area

A high-performance multi-gas analyzer designed to provide up to four simultaneous gas stream measurements.

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MultiExact 4200

SERVOPRO Safe Area

The MultiExact 4200 analyzes up to four gases simultaneously for Syngas and HyCO

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NanoChrome

SERVOPRO Safe Area

Incorporating the latest advances in gas sensing and signal processing methodology, the NanoChrome revolutionizes ultra-trace purity measurements.

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NanoChrome ULTRA

SERVOPRO Safe Area

Using proven ultra-trace sensing, the NanoChrome ULTRA conquers the most stringent demands of the semiconductor industry, delivering a cost-effective solution compared to competing technologies.

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NOx

SERVOPRO Safe Area

Measures NO or NO/NO2/NOx concentrations in industrial gas and vehicle emission applications.

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Oxy 1800

SERVOTOUGH Hazardous Area

Designed to reliably measure up to 100% oxygen (O2) in many industrial applications, the Oxy 1800 is a stable, accurate O2 analyzer for safe area use.

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Oxy 1900

SERVOTOUGH Hazardous Area

The Oxy 1900 oxygen (O2) gas analyzer sets new standards of flexibility, stability and reliability from a single, cost-effective unit.

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OxyDetect

Gas Detection

A life safety monitor designed for safe area or hazardous area environments, the OxyDetect delivers the superior performance of non-depleting Paramagnetic O2 sensing technology.

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OxyExact 2200

SERVOTOUGH Hazardous Area

The high-specification OxyExact 2200 O2 analyzer offers an unrivaled combination of precision, flexibility and performance for optimum process and safety control.

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Plasma

SERVOPRO Safe Area

The Plasma delivers an accurate, highly stable and reliable measurement, with high sensitivity in the 0-1ppm range.

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PureGas

SERVOPRO Safe Area

A getter-based purification unit designed for the purification of carrier gases used in Gas Chromatography (GC) and other analytical applications

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SpectraExact 2500

SERVOTOUGH Hazardous Area

Flexible single and multicomponent gas analysis capability for corrosive, toxic and flammable sample streams.

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SpectraScan 2400

SERVOTOUGH Hazardous Area

A real-time optical analyzer utilizing the Precisive field-proven optical bench. A breakthrough capability in the continuous analysis of light hydrocarbons C1-C6.

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