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Advanced technologies for monitoring and analysis deliver reliable results over a wide range of gases and concentrations

Depending on the type of gas targeted for monitoring and the data output desired, various technologies have been proven to effectively analyze ambient air and detect its components.  We offer a wide range of products that utilize these technologies to enable more reliable air quality monitoring for your operation. 


Chemiluminescence

When combined, certain gases produce high energy chemical reactions that emit light energy (photons), known as chemiluminescence.  Specifically, light emission results when electronically excited molecules decay to lower energy states. These emissions are detected by photomultiplier tubes and, by measuring the intensity and characteristics of the light emitted, the presence and concentration of various gases can be accurately determined.  Our analyzers that operate using this principle employ advanced optical technology for high sensitivity and reliable readings.  Explore them here:

Thermo Scientific Model 17i Ammonia Analyzer

The Thermo Scientific Model 17i Ammonia Analyzer uses the light producing reaction of nitric oxide (NO) with ozone (O3) as its basic principle. The instrument has three modes of operation, NO, NOx and Nₜ. Mode 1. While operating in the NO mode, the sample is mixed with ozone in the reaction chamber. This reaction produces a characteristic luminescence with intensity proportional to the concentration of NO.

Thermo Scientific Model 42i (NO-NO₂-NOₓ) Analyzer

Measure levels of nitrogen oxide (NO-NO2-NOx) in the emissions from a source using chemiluminescent technology with the Thermo Scientific Model 42i NO-NO2-NOx Analyzer.

Thermo Scientific 42iQ NO-NO₂-NOₓ Analyzer

The Thermo Scientific 42iQ NO-NO2-NOx Analyzer utilizes chemiluminescence technology to measure the amount of nitrogen oxides in the air from sub-ppb levels up to 100ppm. This analyzer is a single chamber, single photomultiplier tube design that cycles between the NO and NOx modes.

Thermo Scientific Model 42i-HL High Level NO-NO₂-NOₓ Analyzer

Measure levels of nitrogen oxide (NO-NO2-NOx) in the emissions from a source using chemiluminescent technology with the Thermo Scientific Model 42i NO-NO2-NOx Analyzer.

Thermo Scientific 42iQ High Level NO-NO₂-NOₓAnalyzer

Get 24/7 access to your analyzer’s information. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The 42iQ High Level NO-NO2-NOx Analyzer measures the amount of nitrogen oxides in the air from 10 ppm up to 5000 ppm.

Thermo Scientific 42iQ Low Source NO-NO₂-NOₓ Analyzer

Get 24/7 access to your analyzer’s information. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The Thermo Scientific 42iQ Low Source NO-NO2-NOx Analyzer provides the same level of performance when measuring low to mid-levels of nitrogen oxides in the air using chemiluminescent technology.

Thermo Scientific Model 42i-Y NOᵧ Analyzer

Measure the amount of nitrogen oxides in the air from sub-ppb levels up to 1000 ppb using chemiluminescence with the Thermo Scientific Model 42i-Y NOY Analyzer. The Model 42i-Y is a single chamber, single photomultiplier tube design that measures NOY which includes most oxides of nitrogen except for NH3 and N2O. The 42i-Y complies with all USEPA NCore Network requirements for the measurement of NOy.

Thermo Scientific Model 42i-TL TRACE Level NOₓ Analyzer

Measure the amount of nitrogen oxides in the air from sub-ppb levels up to 1000 ppb using chemiluminescence with the Thermo Scientific Model 42i-TL TRACE Level NOx Analyzer. The Model 42i-TL is a single chamber, single photomultiplier tube design that cycles between the NO, NOx, and Zero modes. The addition of the Zero mode provides for excellent long-term stability and extremely low minimum detectable limits. The 42i-TL has independent outputs for NO, NO2, and NOx and each can be calibrated independently.

Thermo Scientific 42iQTL Trace Level NO-NO₂-NOₓ Analyzer

The Thermo Scientific 42iQ Trace Level NO-NO2-NOx Analyzer utilizes chemiluminescence technology to measure the amount of nitrogen oxides in the air from sub-ppb levels up to 1000ppb. The 42iQTL is a single chamber, single photomultiplier tube design that cycles between the NO, NOx, and Zero modes.


Gas Chromatography (GC)

Gas chromatography (GC) is a proven analytical tool that was initially developed in the 1950s and is now a widely applied technique for separating and analyzing compounds that can be vaporized without decomposition.  Because GC is best used to measure volatile compounds and utilizes gas columns that are stable and long lasting, GC is ideal for certain gas measurement applications.  Explore instruments that use GC here.

Thermo Scientific Direct Methane & Non-Methane Hydrocarbon Analyzer Model 55i

Make automated measurements of methane and non-methane hydrocarbons with the Thermo Scientific Direct Methane & Non-Methane Hydrocarbon Analyzer, Model 55i. Unlike instruments that measure only methane and total hydrocarbons, this back-flush gas chromatography (GC) system provides a direct measurement of non-methane concentrations.


Gas Filter Correlation (GFC)

Gas Filter Correlation (GFC) is a form of Nondispersive Infrared detection. Like NDIR, GFC operates on the principle that carbon monoxide (CO) absorbs infrared radiation at a wavelength of 4.6 microns. Filtering isolates the detected wavelength range to that of the gas target. Because infrared absorption is a non-linear measurement technique, it is necessary to transform the basic analyzer signal into a linear output. The analyzer uses an exact calibration curve to accurately linearize the instrument output over any range up to a concentration of 10,000ppm.

Thermo Scientific 48iQ Carbon Monoxide Analyzer

The Thermo Scientific 48iQ Carbon Monoxide (CO) Analyzer utilizes gas filter correlation technology to measure the amount of carbon monoxide in the air. The 48iQ Gas Analyzer uses an exact calibration curve to accurately linearize the instrument output over any range up to a concentration of 10,000 ppm.

Thermo Scientific 48iQTL Trace Level Carbon Monoxide Analyzer

The Thermo Scientific 48iQ Trace Level Carbon Monoxide (CO) Analyzer utilizes gas filter correlation technology to measure the amount of carbon monoxide in the air. The instrument employs pressure compensation and maintains constant temperature over the operating temperature range for stability. Standard features also include an intelligent zero reference to optimize drift performance and dynamic filtering to maintain data stability and integrity in changing environmental conditions. User settable alarm levels for concentration and a wide variety of internal diagnostics are available from an easy-to-follow touch screen display.

Thermo Scientific Model 48i CO Analyzer

The Thermo Scientific Model 48i Carbon Monoxide (CO) Analyzer utilizes gas filter correlation technology to measure the amount of carbon monoxide in the air. It is approved to meet the following standards: US EPA, UK Environmental Agency, and the EU Environmental Agency, and has ethernet connectivity for efficient remote access.

Thermo Scientific Model 48i-TLE Enhanced Trace Level CO Analyzer

The Thermo Scientific Model 48i-TLE Analyzer is a single chamber, single photomultiplier tube design that measures only CO. Dual range and auto range are standard features in this instrument. Because the instrument is operated continuously in the CO mode, the response time is less than 10 seconds.


Gas Scrubbing

Gas scrubbing technology combines filtration, catalytic conversion, and oxidation to produce pollutant free air (Zero Air) from ambient air.  Zero Air is then used for instrument calibration and as diluent air supply for spanning ambient air analyzers.  Gas scrubbing technology removes NO, NO2, O3, SO2, CO, and hydrocarbons. Our gas scrubbing technology passes pressurized air into a column of Purafil (potassium permanganate on alumina) which oxidizes NO to NO2. From there the air passes through a column of activated charcoal which removes NO2, SO2, O3 and hydrocarbons. Lastly, the air is moved into the reactor where it is heated to 350°C over a catalytic surface which converts CO to CO2 and any remaining hydrocarbons, including methane, to water and CO2. This process results in a pollutant free stream of air.

Thermo Scientific 111iQ Zero Air Supply

The Thermo Scientific 111iQ Zero Air Supply supplies pollutant-free air (zero air) from ambient air to allow for proper zeroing, and to provide clean diluent air for spanning ambient air analyzers.

Non-Dispersive Infrared (NDIR) Technology

The relative simplicity of NDIR technology provides precise, long-term gas analysis while lowering operating cost throughout the life cycle of the instrument. NDIR analyzers operate on the principle that gases absorb radiation in specific infrared wavelength ranges. As infrared light passes through a container of gas, a non-dispersive infrared sensor detects how much of the filtered light wavelength the gas absorbs. A measurement of gas concentrations is obtained. Thermo Scientific analyzers combine this technology with advanced optical filters to enable even more precise measurements.

Thermo Scientific 410iQ Carbon Dioxide Gas Analyzer

The Thermo Scientific 410iQ Carbon Dioxide (CO2) Analyzer utilizes advanced Non-Dispersive Infrared (NDIR) optical filter technology to measure concentration of CO2. The 410iQ Standard Analyzer uses an internally stored calibration curve to accurately linearize the instrument output over any range up to a concentration of 10,000 ppm.

Thermo Scientific 410iQ High Level Carbon Dioxide Gas Analyzer

The Thermo Scientific 410iQ High Level Carbon Dioxide (CO2) Analyzer utilizes advanced Non-Dispersive Infrared (NDIR) optical filter technology to measure concentration of CO2. The 410iQ High Level Analyzer uses an internally stored calibration curve to accurately linearize the instrument output over any range up to a concentration of 25% by volume.


Optically Enhanced Fourier Transform Infrared (OE-FTIR)

Optically Enhanced Fourier Transform Infrared (OE-FTIR) using breakthrough StarBoost Technology enables commercial FTIR gas analysis that dramatically increases sensitivity, linearity and dynamic range over narrow spectral bands of interest. It utilizes specialized optics, electronics and analysis algorithms to go beyond traditional FTIR gas analysis capabilities.

 

This enhancement technology, proven in demanding applications such as ethylene oxide and formaldehyde measurement, enables users to achieve single-digit ppb detection limits for many applications. It can be supplied as a turnkey add-on to the MAX-iR Gas Analyzer and is compliant with several regulatory methods including US Environmental Protection Agency (EPA) method 320 and American Society for Testing and Materials (ASTM) D6348.  

Thermo Scientific MAX-iR FTIR Gas Analyzers

Re-invented with detection limits in single-digit parts per billion for most applications, the Thermo Scientific MAX-iR FTIR Gas Analyzer provides accurate gas detection limits even in the presence of a wide range of interferences and produces results in real time.  With Thermo Scientific StarBoost Technology, it can now drive into mid parts per trillion, challenging the use of traditional technologies that are slower and more costly to operate.

Thermo Scientific MAX-iAQ Continuous Ambient Air Monitoring System

The Thermo Scientific MAX-iAQ Continuous Ambient Air Monitoring System is a factory-ready, fully-automated ambient air monitoring solution for multipoint low-level detection, even in high humidity environments. The fully automated system can quantify 10-100+ compounds from up to 20 sample locations using FTIR spectral analysis.


Pulsed Fluorescence Technology

Our Pulsed Fluorescence analyzers operate on the principle that H2S can be converted to SO2. As the SO2 molecules absorb ultraviolet (UV) light and become excited at one wavelength, the molecules then decay to a lower energy state emitting UV light at a different wavelength. The pulsing of the UV source lamp serves to increase the optical intensity and a greater UV energy throughput and lower detectable SO2 concentrations are realized.

 

Because this technology uses reflective bandpass filters, which are less subject to photochemical degradation and are more selective in wavelength isolation than transmission filters, increased detection specificity and long-term stability are achieved.

Thermo Scientific Model 450i Hydrogen Sulfide - Sulfur Dioxide Analyzer

The Thermo Scientific Model 450i Hydrogen Sulfide and Sulfur Dioxide Analyzer measure the levels of H2S and SO2 in ambient air. This analyzer features pulsed fluorescence technology and performs simultaneous measurement readings to provide reliable data capture on a constant basis.

Thermo Scientific 450iQ Hydrogen Sulfide and Sulfur Dioxide Analyzer

The Thermo Scientific 450iQ Hydrogen Sulfide and Sulfur Dioxide Analyzer utilizes pulsed fluorescence technology. The 450iQ analyzer operates on the principle that H2S can be converted to SO2. As the SO2 molecules absorb ultraviolet (UV) light and become excited at one wavelength, the molecules then decay to a lower energy state emitting UV light at a different wavelength. Reflective bandpass filters, as compared to commonly used transmission filters, are less subject to photochemical degradation and are more selective in wavelength isolation. This results in both increased detection specificity and long-term stability.

Thermo Scientific Model 43i-HL High Level SO2 Analyzer

Measure high levels of SO2 from a source up to 10,000 ppm, the first gas analyzer to utilize pulsed fluorescence technology to measure SO2.

Thermo Scientific 43iQ Sulfur Dioxide Analyzer

The Thermo Scientific 43iQ Sulfur Dioxide (SO2) Analyzer utilizes pulsed fluorescence technology to measure the amount of sulfur dioxide in the air. The pulsing of the UV source lamp serves to increase the optical intensity whereby a greater UV energy throughput and lower detectable SO2 concentration are realized.

Thermo Scientific Enhanced Trace Level SO₂ Analyzer Model 43i-TLE

Measure the levels of SO2 in ambient air down to 50 ppt with the Thermo Scientific Enhanced Trace Level SO2 Analyzer Model 43i-TLE, a pulsed fluorescence gas analyzer known for superior accuracy, sensitivity, and reliability in trace-level ambient applications.

Thermo Scientific 43iQ Trace Level Sulfur Dioxide Analyzer

The Thermo Scientific 43iQ Trace Level SO2 Analyzer utilizes pulsed fluorescence technology to measure the amount of sulfur dioxide in the air to .05ppb.

Thermo Scientific Model 43i-HL High Level SO₂ Analyzer

Measure high levels of SO2 from a source up to 10,000 ppm with the Thermo Scientific Model 43i-HL SO2 Analyzer, the first gas analyzer to utilize pulsed fluorescence technology to measure SO2.

Thermo Scientific 43iQ High Level Sulfur Dioxide Analyzer

The Thermo Scientific 43iQ High Level SO2 Analyzer utilizes pulsed fluorescence technology to measure the amount of sulfur dioxide in the air up to 1000ppm in standard range and up to 10000ppm in extended range.


UV Photometry

UV photometric gas analyzers take advantage of the fact that certain gases exhibit a pronounced absorption band in the spectral range of 200nm to 400nm. Because of the high absorption behavior of the gases in specific bands, analyzers that use UV photometry can reliably detect very low concentrations of target gases.  Additionally, results using this method are resistant to interference from the presence of water vapor and carbon dioxide. This technology is also advantageous in that additional optical spectrometers or filter elements are not required.

Explore analyzers that use UV Photometry:

Thermo Scientific Model 49i Ozone Analyzer

Measure the amount of ozone in ambient air with the dual-cell, UV photometric Thermo Scientific Model 49i Ozone Analyzer.

Thermo Scientific 49iQ Ozone Analyzer

The Thermo Scientific 49iQ Ozone (O3) Analyzer utilizes UV Photometric technology to measure the amount of ozone in the air from ppb levels up to 200ppm. The Thermo Scientific 49iQ Analyzer is a dual cell photometer, the concept adopted by NIST for the national ozone standard. Because the instrument has both sample and reference flowing at the same time, a response time of 20 seconds can be achieved.

Thermo Scientific Model 49i-PS Ozone Primary Standard

Produce ozone concentrations of up to 1000 ppb with the Thermo Scientific Model 49i-PS Ozone Primary Standard, a UV photometric primary standard suitable for calibration of ozone analyzers and transfer standards. The Model 49i-PS uses a dual-cell photometer, the concept adopted by NIST as the principle technology for the national ozone standard.


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