Features:

Compared with other gas sensor technologies, the TDL Gas Module has the following main features:

•   High selectivity: Tunable Diode Laser Absorption Spectroscopy(TDLAS) achieves high spectral resolution. Consequently, the molecular spectral ‘fingerprint’ avoids interference from other gases. Thus, TDLAS outperforms conventional analytical methods
•  Wide universality: TDLAS technology can effectively measure all active molecules that absorb in the near-infrared region, essentially covering the primary engineering analysis gases.
•  Strong applicability: TDLAS technology has the advantages of fast speed and high sensitivity. In practical applications, its time resolution can reach the ms level, and its sensitivity can reach the ppb level.
  

ESE-LASER-100M TDL  gas module adopts the principle of Tunable Diode Laser Absorption Spectroscopy (TDLAS) to measure the concentration of specific gases in process gas components, including NH3, HCl, HF, H2S, CH4, CO, CO2, O2, etc. The gas analysis module has the characteristics of high sensitivity, fast response, no interference from background gas, non-contact optical measurement, etc. It can be used in gas emission monitoring, process control, trace gas monitoring of air stations in many industrial fields, such as coal-fired power plants, waste incineration power plants and chemical plants, in combination with appropriate gas pretreatment systems, providing a reliable guarantee for real-time and accurate reflection of gas concentration changes.

With high sensitivity, high spectral resolution, excellent selectivity, and fast response, TDLAS enables accurate real-time gas measurement. It is widely applied in molecular spectroscopy, industrial process monitoring, combustion diagnostics, engine performance testing, vehicle emission monitoring, gas safety and leak detection, and trace pollutant monitoring.

Principle and components of TDL Gas Module

TDLAS stands for Tunable Diode Laser Absorption Spectroscopy, and it is a technique used for gas sensing and analysis. TDLAS gas modules are devices that utilize this spectroscopy technique to measure the concentration of specific gases in a sample.

In TDLAS, a laser diode emits light at a specific wavelength that is absorbed by the target gas molecules. By measuring the amount of light absorbed by the gas sample, the concentration of the gas can be determined. TDLAS offers high sensitivity, selectivity, and accuracy in gas analysis, making it suitable for various applications such as environmental monitoring, industrial process control, and scientific research.

TDLAS gas modules typically consist of a laser source, optical components, a gas cell or sampling system, and a detector. The laser emits light at specific wavelengths that correspond to the absorption lines of the target gas. The light is then transmitted through the gas sample, and the amount of absorbed light is measured by the detector. Based on the absorption signal, the gas concentration can be calculated.

These gas modules are often integrated into larger systems or instruments for specific applications. They may include additional features such as temperature and pressure compensation, data logging capabilities, and communication interfaces for data transfer and control.

Overall, TDLAS gas modules are widely used for precise and reliable gas analysis in various industries and research fields.