Laser Raman spectroscopy is a spectral gas analysis technology based on Raman scattering of gases. It utilizes a high-beam-quality laser device to emit laser light at a specific wavelength, which is focused in the gas chamber using an achromatic lens.
At the focal point, collisions between the laser and gas molecules generate Raman scattering. The intensity of the Raman characteristic peaks is proportional to the gas concentration value.
By measuring and analyzing the position and intensity of the Raman characteristic peaks with a spectrometer, simultaneous measurement of multiple gas components can be achieved. Since the excitation and collection of Raman scattering spectra occur instantaneously and signals can be collected in real-time, Raman spectrometers have faster response speeds compared to chromatographs and mass spectrometers.
Principle of Laser Raman Technology.
Image Credit: Cubic Sensor and Instrument Co.,Ltd
Laser Raman Scattering Characteristic Peaks of Common Gases.
Image Credit: Cubic Sensor and Instrument Co.,Ltd
Cubic Instruments, a leading manufacturer of gas sensors and gas analyzers, has leveraged the mature technology platform of Laser Raman spectroscopy to develop the Laser Raman Gas Analyzers LRGA-3100, LRGA-6000 and LRGA-3200EX. These advanced Laser Raman gas analyzers are capable of online real-time measurement of multiple gas concentrations, providing reliable gas analysis solutions for industrial process monitoring.
Product Features
- Multi-Gas Measurement: Online measurement of multiple gases, including N2, O2, H2, CO, CO2, CH4, C2H6, C3H8, n-C4, i-C4, H2S, NH3, etc.
- Real-Time Calculation: Real-time calculation of gas quality indexes like calorific value, Wobbe index, etc.
- Wide Detection Range: Wide detection range from 0.1 % to 100 % with high resolution and accuracy.
- Fast Response: Fast response time in seconds, suitable for industrial online continuous monitoring.
- Anti-Interference: Strong anti-interference ability based on Laser Raman technology of gas characteristic fingerprint spectrum.
- Low Maintenance: No carrier gas required and no consumables.
- Suitable for Harsh Conditions: Capable of measuring online in harsh process conditions of high temperature and high pressure with a proper gas conditioning system.
Product Specifications
Source: Cubic Sensor and Instrument Co.,Ltd
| Applications |
Measured Gases |
| Chemicals: Coal Gasifier |
CO, CO2, H2, N2, O2, CH4, C2H2, C2H4, C2H6, C3H8, H2S… |
| Chemicals: Coal to Natural Gas |
CO, CO2, H2, N2, O2, CH4, C2H6, C3H8, iC4, nC4, H2S, H2O… |
| Chemicals: Amonia Synthesis/Urea/Fertilizer |
CO, CO2, H2, N2, O2, CH4… |
| Iron & Steel |
CO, CO2, CH4, C2H2, C2H4, C2H6, C3H8, O2, H2, N2, H2S… |
| Oil & Gas |
CH4, CO, CO2, H2S, C2H6, C2H4, C3H6, C3H8, H2… |
| Aluminum |
CO, CO2… |
| Environment |
H2, N2,O2, CO, CO2, CH4, C2H2, C2H4, C3H6, C3H8, H2S… |
| Power |
CO, CO2, H2S, CH4, H2O… |
| Cement |
CO, CO2, H2O, H2S… |
| Specifications |
| Measurement Components |
H2, N2, O2, CO, CO2, H2S, CH4, C2H2, C2H4, C2H6, C3H6, C3H8, Calorific value, Wobbe index, etc. |
| Measurement Range |
0.1% to 100% (can be customized based on actual application condition) |
| Accuracy |
±1% F.S. |
| Response Time |
LRGA-3100: ≤10 s
LRGA-6000: ≤30 s |
| Repeatability |
1% F.S. |
| Power Supply |
100~240 VAC, 50~60 Hz |
Laser Raman Spectroscopy Gas Analyzer | LRGA-3100
Based on Laser Raman spectroscopy technology, LRGA-3100 is specifically designed to tackle the challenges of rapid and simultaneous monitoring of multiple gases.
LRGA-3100 offers a wide detection range from 0.1 % to 100 %, ensuring high resolution and high accuracy. With a rapid response time measured in seconds, LRGA-3100 is ideally suited for continuous online monitoring in industrial applications. By optimizing the optical path and structure, the overall size of LRGA-3100 has been significantly reduced, making it more compact.
Image Credit: Cubic Sensor and Instrument Co.,Ltd
Laser Raman Gas Analyzer | LRGA-6000
LRGA-6000 is an advanced gas analysis system mainly composed of the core analysis unit LRGA-3100, as well as a gas sampling and conditioning system and a data processing system.
Based on the principle of Laser Raman scattering, LRGA-6000 excites, collects, processes, and identifies the characteristic Raman spectra of the target gas to quantify its concentration accurately.
LRGA-6000 offers online real-time measurement of multiple gases simultaneously, with a rapid response time in seconds. Featuring a rugged system design, LRGA-6000 works properly for industrial applications with harsh gas conditions and provides reliable measurement data support for process monitoring and optimization.
Image Credit: Cubic Sensor and Instrument Co.,Ltd
In-Situ Laser Raman Gas Analyzer | LRGA-3200EX
Designed for in-situ installation and measurement, the LRGA-3200EX provides continuous, non-destructive gas analysis of nearly 20 components, making it ideal for long-distance monitoring, even in harsh conditions.
Equipped with up to four explosion-proof probes, the LRGA-3200EX allows for simultaneous multi-point monitoring, ensuring comprehensive process control without the need for manual switching, as required in conventional systems.
The LRGA-3200EX’s rapid response and data refresh times—measured in seconds—enable real-time monitoring critical for industrial process optimization. Additionally, the positive pressure explosion-proof design of the system further enhances operational safety by preventing the ingress of toxic and flammable gases.
Unlike traditional gas chromatography (GC) systems, the LRGA-3200EX operates without consumables, significantly lowering maintenance costs and simplifying long-term operation. Supporting multiple communication protocols, including RS-232/RS-485, TCP/IP, USB, and 4-20 mA, the LRGA-3200EX facilitates remote control and centralized management, offering superior flexibility and efficiency in industrial applications.
Image Credit: Cubic Sensor and Instrument Co.,Ltd