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Keywords of this article: Rosemount http://china-rosemount.cn/ Rosemount’s QCL technology is based on a principle known as Tunable Diode Laser Absorption Spectroscopy (TDLAS); it utilizes tunable diode lasers and laser absorption spectroscopy to measure the concentrations of components in gas mixtures. Compared to other measurement techniques such as paramagnetic detectors (PMD) and chemiluminescence, TDLAS offers multi-element detection capability, an expanded dynamic range, improved accuracy, reduced maintenance requirements, and a longer lifespan. The use of laser sources such as spectral lasers ensures high-resolution spectroscopy (HRS), allowing QCLs to access the valuable mid-infrared (MIR) portion of the electromagnetic spectrum. The main principles of this type of Rosemount technology are as follows: 1. QCL technology provides fast, high-resolution spectra for detecting and identifying a range of molecules in the mid-infrared wavelength range. When combined with a tunable diode laser (TDL) spectrometer, it enables an instrument to cover a wider range of wavelengths and to monitor spectra in the near-infrared/mid-infrared spectrum ranges. 2. Patentable frequency transient (“linear frequency modulation”) technology: When the analyzer is powered on, the QCL gradually heats up, and as the temperature rises, the laser wavelength begins to increase. Before cooling the device to its original temperature, the QCL immediately scans the wavelength frequency to detect each desired component; this patented laser frequency transient (“linear frequency modulation”) technique completes in just one microsecond, allowing thousands of spectra to be recorded per second. 3. Simultaneous gas analysis: Up to six high-resolution laser modules can be configured to simultaneously measure up to twelve distinct components. 4. Component detection and analysis: Integrating QCL and TDL technologies into a single analyzer provides unparalleled measurement performance and accuracy for process gas analysis. A narrow linewidth enables the scanning and identification of individual peaks in components with minimal interference, and without the need for filtering, reference cells, or stoichiometric adjustments. 5. Advanced QCL laser modules: One of the main advantages of QCL is its use in laser modules. These modular laser units are robust and durable, and can be disassembled as needed for easy maintenance or replacement. Securely connected to the analyzer’s optical platform, each module is pre-configured to detect up to two components simultaneously, without the need for on-site alignment. Shanghai Mengyan Automation Equipment Co., Ltd. Address: Room 1119, Jiahong Building, No. 639 Guangfulin Road, Songjiang, Shanghai. Contact person: Xu Gong. Mobile phones: 18616582302 / 18616582330. QQ: 764861476. Email: sales@shmyzdh.com