Chenno Instruments' laser gas analyzer adopts the principle of TDLAS. The gas analyzer is characterized by high sensitivity, fast response, no interference from background gas, non-contact optical measurement, etc. It can be applied to gas emission monitoring and process control in many industrial fields. For example, coal-fired power plants, waste-to-energy plants and chemical plants, etc., providing a reliable guarantee of real-time and accurate reflection of gas concentration changes.
Based on TDLAS technology, the laser gas analyzer adopts a number of innovative key technology applications to provide high-performance instrument solutions for customers with different testing needs: based on the traditional laser light source wavelength modulation (WMS) technology, it selects the right type of laser type for the spectral absorption characteristics of different test objects and adopts a multi-line scan processing method, making the background gas The instrument adopts a specially designed Herriot cell, which can achieve a measurement range of 3-30 meters. The optimized compact structure ensures good thermal stability of the gas chamber and minimum evacuation volume; the instrument adopts a fully digital lock-in amplifier, which collects and amplifies the second harmonic of the test signal. The instrument adopts a fully digital lock-in amplifier to collect and amplify the second harmonic of the test signal, which effectively suppresses the low frequency noise in the measurement and improves the anti-interference and test sensitivity.
Core Technologies and Applications
The iLAS and eLAS series of laser gas analyzers use several innovative key technology applications based on TDLAS technology to provide high-performance instrument solutions for customers with different testing needs.
♦ Multi-line scanning technology
Based on the traditional technology of wavelength modulation of laser light source (VMS), the appropriate type of laser is selected for the spectral absorption characteristics of different test objects, and a multi-line scan processing method is used to minimize the interference of background gas, water gas and dust under the condition that the reference gas cell is not required.
♦ Long optical range gas chamber technology
For low concentration measurements, the absorption light range of the gas has high requirements. Two technical solutions, a specially designed Heliott cell, or an off-axis integration chamber, are commonly used in extractive test instruments to achieve a measurement light range of 3 to 100 meters. The optimized design of the compact structure ensures good stability of the gas chamber and minimum evacuation volume.
♦ Harmonic detection technology
A fully digital lock-in amplifier is used to collect and amplify the second harmonic of the test signal, effectively suppressing the low frequency noise in the measurement and improving the anti-interference and test sensitivity.