Related Experiment Video
Updated: Mar 15, 2026
10:42
Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
6.7K
Lightweight, Compact, and High-Sensitivity Passive Fourier Transform Infrared Spectroscopy-Based Gas Detection System
Xiangning Lu1,2, Min Huang1,2,3, Wenbin Ge4
1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China.
Sensors (Basel, Switzerland)
|March 14, 2026
Summary
A new lightweight gas detection system uses passive Fourier Transform Infrared Spectroscopy (FTIR) for accurate, real-time monitoring of harmful industrial emissions like sulfur hexafluoride (SF6). This flexible system offers high sensitivity and expands monitoring capabilities for environmental and safety applications.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Spectroscopy
Background:
- Industrial pollution and harmful gas emissions pose significant environmental and safety challenges.
- Existing gas detection technologies exhibit limitations in real-time performance, accuracy, and multi-component identification.
Purpose of the Study:
- To develop a lightweight, compact, and highly sensitive gas detection system.
- To overcome the limitations of current gas sensing technologies for industrial emissions.
Main Methods:
- Utilized passive Fourier Transform Infrared Spectroscopy (FTIR).
- Integrated an improved parallel pendulum mirror interferometer and a low-noise signal preprocessing module.
- Implemented a novel oversampling method combining equal time, equal optical path difference, and digital filtering.
Main Results:
- Achieved a detection limit of less than 20 ppm for sulfur hexafluoride (SF6) in indoor tests.
- Successfully performed accurate SF6 gas detection in real-world flight tests.
- Demonstrated high sensitivity, strong flexibility, and excellent real-time performance.
Conclusions:
- The developed FTIR-based system offers a viable solution for advanced gas monitoring.
- The system's adaptability and performance make it suitable for industrial safety, environmental monitoring, and transportation support.
- The technology shows promise for expanding gas detection applications in various critical fields.
Keywords:
fourier transform infrared spectroscopygas detectionhigh precision data acquisitionreal-time monitoringMore Related Videos
Related Concept Videos
01:19Gas Chromatography: Types of Detectors-II
1.4K
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
1.4K
01:13Gas Chromatography: Overview of Detectors
2.3K
Detectors in gas chromatography (GC) help identify and quantify the components of a mixture by translating chemical properties into measurable signals, which are displayed on a chromatogram. Detectors can be categorized into two main types: destructive and non-destructive.
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
A non-destructive detector allows a sample to be analyzed without altering or consuming it, meaning the sample can be collected after detection for further analysis. Examples include thermal conductivity detectors and...
2.3K
01:21Gas Chromatography: Types of Detectors-I
1.8K
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
1.8K
01:25IR Spectrometers
3.2K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
3.2K
01:02Flame Photometry: Overview
1.8K
Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
1.8K
01:15High-Performance Liquid Chromatography: Types of Detectors
2.0K
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
2.0K