摘要:
A gas analysis probe (60, 70, 74, 78) or probe (60, 70, 74, 78) for gas analysis is disclosed which is for or is used or provided in a pipe through which sample gas (S) flows. The probe (60, 70, 74, 78) includes a tubular member (61) and one or more sample gas inflow portions (65). The tubular member (61) is disposed to cross a flow of the sample gas (S), and includes a measurement field (69) to which the sample gas (S) is introduced. The one or more sample gas inflow portions (65) are provided in the tubular member (61). The sample gas (S) flows around and flows into the measurement field (69) through the one or more sample gas inflow portions (65).
摘要:
An efficient absorption spectroscopy system (100) is provided for detecting the presence of trace concentrations of gaseous species. In particular, a method of obtaining data regarding a gas analyte, comprising: providing the analyte from a gas chromatography column (130); providing the analyte to a gas flow cell (104); passing VUV wavelengths or less of light from a VUV source (110) through the gas flow cell (104); detecting absorption of the VUV wavelengths or less of light by the analyte through the use of a spectrometer (106, 154, 156) optically coupled to an optical output (142) of the gas flow cell (104); obtaining a three dimensional data set indicative of an amount of absorption of the analyte as a function of wavelength and time; and analyzing the three dimensional data set to determine an identity and quantity of the analyte.
摘要:
A probe for an IR or UV sensor comprising a light emitter and detector is described comprising a lens (2). The detector detects the spectrums of the emitted light after it has passed a gas to be measured (6). The sensor of the present invention is especially suitable for such as harsh or aggressive environments measuring the exhaust gasses, for example in ships, vehicles, chimneys etc., and comprises purge gas protections for delicate optical parts to prevent particles etc. from the exhaust gas depositing on the optics. The sensor further has a flow of sample gas from the gas to be measured being adapted to prevent the purge gas (7) from interfering with the measurements where the sample gas is split into at least two flows (6a, 6b, 6c) where one (6c) is adapted for preventing the purge gas from influencing the measurement in a measuring region (5).
摘要:
An efficient absorption spectroscopy system is provided. The spectroscopy system may be configured to measure solid, liquid or gaseous samples. Vacuum ultra-violet wavelengths may be utilized. Some of the disclosed techniques can be used for detecting the presence of trace concentrations of gaseous species. A preferable gas flow cell is disclosed. Some of the disclosed techniques may be used with a gas chromatography system so as to detect and identify species eluted from the column. Some of the disclosed techniques may be used in conjunction with an electrospray interface and a liquid chromatography system so as to detect and identify gas phase ions of macromolecules produced from solution. Some of the disclosed techniques may be used to characterize chemical reactions. Some of the disclosed techniques may be used in conjunction with an ultra short-path length sample cell to measure liquids.
摘要:
An optical sensor may include a sensor head that has an optical window for directing light into a flow of fluid and/or receiving optical energy from the fluid. The optical sensor may also include a flow chamber that includes a housing defining a cavity into which the sensor head can be inserted. In some examples, the flow chamber includes an inlet port defining a flow nozzle that is configured to direct fluid entering the flow chamber against the optical window of the sensor head. In operation, the force of the incoming fluid impacting the optical window may prevent fouling materials from accumulating on the optical window.
摘要:
A gas analysis probe (60, 70, 74, 78) or probe (60, 70, 74, 78) for gas analysis is disclosed which is for or is used or provided in a pipe through which sample gas (S) flows. The probe (60, 70, 74, 78) includes a tubular member (61) and one or more sample gas inflow portions (65). The tubular member (61) is disposed to cross a flow of the sample gas (S), and includes a measurement field (69) to which the sample gas (S) is introduced. The one or more sample gas inflow portions (65) are provided in the tubular member (61). The sample gas (S) flows around and flows into the measurement field (69) through the one or more sample gas inflow portions (65).
摘要:
In order to be able to prevent analysis accuracy from being reduced by a backward flow of sample gas from dead volume in a cleaning mechanism into a cell at the time of analysis, a gas analysis device 100 is provided with: the cell 21 into which the sample gas is introduced; an analysis part 22, 23 that analyzes the sample gas introduced into the cell 21; gas ports 91 that are arranged toward predetermined regions of gas contact surfaces in the cell; and a piping mechanism 92 that connects the gas ports 91 to a predetermined purge gas source 93, and is configured to blow purge gas from the gas ports toward the predetermined regions at the time of purging that cleans the gas contact surfaces, and wherein the gas analysis device 100 is further provided with a switching part 94 that switches a connecting destination of the piping mechanism 92 from the purge gas source to a predetermined suction part 24, and configured to, at the time of introducing or analyzing the sample gas, connect the gas ports 92 to the suction source 24.