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The online site of the laser gas analyzer using a single-line spectroscopy in the near-infrared spectral range. Singlet spectrum measurement technique is based on the selection of a single absorption line in the near infrared region of the measured gas. The absorption line spectroscopy of selected absorption lines in the wavelength of the selected absorption lines of other gases (no cross-absorption interference). Then, by adjusting the diode laser temperature and drive current, the diode laser frequency adjustment corresponds to a single gas absorption line. Laser spectral width corresponding adjustment to the single than the measured gas absorption line spectrum width narrower. By changing the current of the diode lasers, including the single absorption line of the laser wavelength is scanned emitted (see Figure A). The laser beam of Laser Pointers is within a relatively wide range.
During the launch of the laser scanning as a feature of the wavelength, the receiving unit to detect the light intensity will change and this change is only from the optical channel between the laser and the receiver under test gas molecules on the absorption of light. To detect single absorption line shape and size (see Figure A), used to calculate the gas content between the transmitter and receiver. Absorption lines of other gases does not appear in the selected wavelength range, it will not interfere with the single absorption line, thus affecting the gas content measurement. The laser gas field analyzer is not to absorb the impact of watershed pollutants, dust, or window in the process gas, which is due to the calculation of the gas content is based on a unique single absorption line size and shape. In other seasons, the ambient temperature is not that low, the preheating is not the necessity for cheap led lights.
Therefore, to achieve a more reliable measurement, and reduce maintenance needs. Because of its small but sturdy mechanical unit, the laser gas field analyzer is very easy to install. Consists of three basic units: transmitting and receiving unit directly assembled to the welded pipe or flue DN50/PN10 or PN16 Flange by itself flange can also be inserted between them with flange valve (recommended ball valve ). Together a PC computer to the analyzer unit, run software installation is required. Optical window, stainless steel flange and purge establish a process gas analyzer interface. In order to prevent dust and other pollutants in the window on the aggregation of required dry and free from oil compressed air, gas (usually nitrogen) or fan continuous purge. It is the same principle for the preheating of cheap led lights.
Analyzer adjusted by adjusting the transmitter and the receiver flange. Prevent process gas leakage in the installation and maintenance of valve (recommended ball valve) can be installed between the process gas and the flange, these valves also protect the window. The rugged industrial design and continuous purging, making the laser gas site online analyzer maintenance is very easy to maintain the workload is quite small (almost close to maintenance-free). No moving parts in the instrument, so preventive maintenance is limited to just visual inspection and cleaning of optical window. Experience has shown that the maintenance cycle is usually more than three months, and simple to just clean the optical window. For outside the recommended maintenance intervals due to the critical parameters have been an internal sense, maintenance, equipment will be given to remind. This is the normal phenomenon for cheap led lights.
The laser gas site online analytical instrument factory calibrated for the first time using the calibration without the need re-calibration at least six months or a few years later. The advanced technology used by the analyzer, calibration is very easy. Through the built-in "to the receiving unit, the fluid through the unit and blown into the calibration gas calibration can be site-line calibration without removing the transmitter and receiver unit. Calibration via a PC, the calibration process is very easy - service software running on your PC to complete all of the computing tasks. Can also be used offline calibration of the calibration tube. Laser gas field analyzer offers three major gas content of the output signal as a standard signal. Sometimes no preheating is needed for cheap led lights in the summer.