Portable Fourier Transform Infrared Gas Analyzer

Product Introduction

In ambient air, the vast majority of trace gases are polar molecules, such as CO, NO, NO2, N2O, SO2, HCl, HF, HCN, NH3, etc., along with some non-polar molecules like CO2 and CH4. After interacting with infrared light, these gases undergo changes in molecular dipole moments, displaying distinct characteristic absorption peaks in the infrared spectrum. By analyzing the position distribution and intensity variations of these infrared characteristic absorption peaks of gas molecules, we can determine the types and concentrations of unknown gases, enabling qualitative and quantitative gas analysis.

Compared to traditional filter-type infrared and grating-type infrared analyzers, Fourier Transform Infrared (FTIR) offers higher resolution and signal-to-noise ratio, faster scanning speeds , and maximum light throughput, making it the most powerful spectral analysis tool in the current infrared market. The AT-61076, with its superior spectral resolution and signal-to-noise ratio, is capable of simultaneous multi-component analysis. Despite overlapping absorption spectra of various mixed gases, the high-resolution gas spectra contain vibrational and rotational information of molecules. Utilizing the least squares chemometric algorithm, combined with a standard infrared database of gas molecules, the contributions of different gas components can be separated from the mixed spectra, thereby obtaining the concentrations of each component. The faster scanning speed of the AT-61076 enables on-site measurements and real-time online analysis of gases. Its higher light throughput allows for a single measurement to acquire the full-band spectrum within the detector's response range, enabling flexible selection of inversion bands for concentration analysis based on the absorption characteristics of different gases. Therefore, the AT-61076 spectral method is highly suitable for on-site measurements of complex gases in the environment.

The AT-61076 is our company's first portable Fourier Transform Infrared Gas Analyzer, integrating optical components such as a vibration-resistant interferometer, moisture-proof ZnSe beam splitter, and electrically cooled high-sensitivity MCT detector within a 9.8-meter long optical path gas cell. It enables rapid analysis of multiple gas components on-site with ppb-level sensitivity. The AT-61076 can be used to monitor toxic and harmful inorganic gases from waste incineration emissions, coal-fired power plant emissions, combustion gas emissions, chemical gas leaks, and flue gas analysis, as well as to measure VOCs (Volatile Organic Compounds) and other volatile organic gases or assess gas purity.

The AT-61076 host is compactly designed with strong vibration resistance, fully considering the practical needs of on-site applications. It is equipped with a vibration-resistant interferometer, ensuring permanent optical path alignment. Users can easily carry it for on-site testing by hand or on their shoulders. In terms of moisture resistance, the host comes standard with a ZnSe moisture-proof beam splitter and ZnSe windows, allowing users to work in the field for extended periods without concerns. The latest electrically cooled MCT detector is configured to directly output digital signals, enhancing the detection sensitivity of trace gases while avoiding the inconvenience of using liquid nitrogen-cooled MCT detectors in the field. The AT-61076 host has a built-in rechargeable battery, providing continuous power for over 3 hours under normal temperature conditions. In emergencies, it can be rapidly charged using an 18-24V vehicle battery. Additionally, the host is equipped with sampling devices such as air pumps and filters for convenient on-site collection of target gases.

The long optical path gas cell of the AT-61076 features an aluminum alloy body with mirrors coated with multiple layers of gold and magnesium fluoride anti-corrosion layers, making it suitable for various harsh environmental gases. The gas cell employs multiple reflections, achieving an optical path of up to 9.8 meters, capable of detecting gases at the ppb level. Despite its long optical path, the gas cell has a volume of only 400mL, offering higher light throughput than traditional gas cells with the same optical path and requiring less gas. For online monitoring, the gas replacement speed within the cell is faster.

The AT-61076 gas analyzer connects to a laptop via an "Ethernet" network card and automatically establishes a connection upon startup. The software is equipped with over 3,000 infrared reference spectra of gases for qualitative analysis and quantitative models for several commonly used gases. The fully Chinese-version gas analysis processing software can simultaneously measure and display the concentration values of over 30 components. Additionally, the software can reprocess data, including functions such as rapid spectrum comparison, standard spectrum library retrieval, and quantitative analysis.

Product Features

1. Vibration-resistant interferometer with permanent optical path alignment, fully gold- coated mirrors, and a 30-degree optical compensation design, suitable for on-site detection.

2. Utilizes the latest electrically cooled MCT detector, directly outputting digital signals.

3. Infrared light source is a ceramic source with a temperature of 1550K.

4. Supports the use of multiple infrared reference spectrum libraries, such as over 3,000 qualitative analysis gas spectra.

5. Multiple-reflection long optical path gas cell capable of analyzing gas molecules down to the ppb level; can search for and identify unknown gas components, suitable for analyzing various gases in on-site environments. Fully gold-coated mirrors with special anti-corrosion layers, suitable for various harsh environmental gases.

6. Can simultaneously display the concentration values of over 30 quantitative gas components.

7. The infrared host connects to a laptop via an "Ethernet" network card without any restrictions. The computer can remotely control, sample, and process data, enabling real-time data sharing and effectively reducing the risk of analysts being exposed to hazardous substances.

8. Built-in battery providing continuous power for over 3 hours under normal temperature conditions.

Technical Specifications