The MultiGas™ 2030 HS is a high resolution FTIR based gas analyzer designed to monitor automobile, diesel and catalyst combustion exhaust at 5 Hz sampling frequencies. It is designed to allow gas flows up to and exceeding 100 L/min with no back pressure or acoustic gas cell noise generated that could degrade the quantitative measurement. Twenty plus gases can be quantified simultaneously at this frequency without any reporting delays. Samples containing up to 30% absolute water content can be monitored without chillers by maintaining the gas temperature and appropriate particulate filtration.
The MultiGas 2030 HS analyzer is composed of a high speed 0.5 cm-1 process hardened FTIR spectrometer. The spectrometer is coupled to a patented 5.11 m high-opticalthroughput 200 mL gas sampling cell with ½ inch plumbing to reduce backpressure and allow for higher flows. The analyzer generally incorporates a high sensitivity liquid nitrogen cooled MCT that can maintain cryogenic temperatures for up to 12 hours on a single charge. The system is delivered complete with easy to use software and health diagnostics, calibration, installation and training.
Designed specifically for process and environmental monitoring, the 2102 Process FTIR Spectrometer is compact and rugged. Capable of operating at spectral resolutions up to 0.5 cm-1, it is the fastest, most sensitive and stable process FTIR available. In addition, it can operate in hostile environments with a high degree of immunity to vibration and temperature changes. An advanced, high-speed data processing system is standard, and provides low-noise infrared spectra for analysis.
The MultiGas 2030 HS analyzer features robust quantitative analysis software, which can analyze and report concentrations for dozens of compounds simultaneously. The software, which is installed on a high speed computer, performs automatic corrections for gas temperature and pressure variations, which are measured directly by the analyzer. Samples can be acquired and analyzed in less than 0.2 seconds, making transient analysis possible.
During data collection the MultiGas software continuously acquires and processes spectra while computing the concentrations of the gases that are selected in the setup. Display formats include concentration histories in graphical and tabular formats, the measured spectrum and spectral residuals. The residual spectrum can be utilized to visually determine error in the analysis, making QA/QC checking easy and straight forward to accomplish. The spectral residuals represent the “left-over” spectral information once all the reference spectra have been accounted for. Once spectra have been collected and saved, these spectra may be reprocessed at any time using the same or different calibration sets.
This spectrometer is coupled to a patented low volume (200 mL) multi-pass gas cell with a 5.11 meter effective pathlength. The patented design of this cell incorporates aspheric, aberration-correcting mirrors which provide more than twice the optical throughput of a conventional multipass gas cell. The gas cell can be set and maintained at any temperature up to 191°C. Normally it is operated at 150°C or 191°C for combustion applications.
The MultiGas software features multi-point calibration curves that provide a dynamic range up to 9 orders of magnitude (ppb to 100%). Calibrations for many species are provided with the instrument, and additional calibrations can be generated by the user from gases of known concentration. Utilities in the MultiGas software verify the performance of each instrument, which allows a calibration generated on one MultiGas to be used on any other MultiGas without alteration.
Low-level detection limits for the 5.11 meter gas cell and a mercury-cadmium-telluride (MCT) detector at 0.5 cm-1 resolution for typical gases in the absence of interfering species are as follows:
|Name||Formula||Lowest Detectable Limit*|
|Carbon Dioxide||CO2||0.2 ppm|
|Carbon Monoxide||CO||1.0 ppm|
|Nitrogen Dioxide||NO2||0.5 ppm|
|Nitric Oxide||NO||1.0 ppm|
|Sulfur Dioxide||SO2||1.0 ppm|
* With 20/20™ cell and 0.2 sec measurement