Infrared gas analyzer, gas research is the use of infrared sun rays. It is based on a different quantity of components to be analyzed, varied radiation intentness. The keptg radiation helps make the heat range rise inside the detector, the going sheets of film varied from the force side, to produce a capacitor pipe inspection
indicate of the detector. This can indirectly measure the concentration of components to be analyzed.
. Research of pipe inspection principles
Infrared natural gas analyzer comprises of a couple of self-governing light source can make two beams of infrared, respectively, after the stream modulator, a ray of 5Hz. In accordance to the actual demands of rays through a filter to decrease the background of other gases absorb infrared gas component interference.
Infrared through two air slot provided is filled with a nonstop flow through the test pipe inspection gas way of measuring slot provided, the other is filled with a non-absorbing properties of the research chamber history gas. Operation, when measuring pipe inspection slot provided measured gas levels, the intentness of infrared light amount change thus, and the research beam (reference chamber beam) does not change the quantity of light. From the compartment out of the light quantity distinction by the detector, the pressure difference detector and the detector signal into a capacitor. This signal is amplified by the signal conditioning circuitry prepared and sent to the measure as well as the total control of the CRT display. The size of the output signal is proportional to the concentration and the measured components.
Infrared gas analyzer can be used to analyze a variety of polyatomic gases, such as: C2H2, C2H4, C2H5OH, C3H6, C2H6, C3H8, NH3, CO2, CO, CH4, SO2, etc. Can be used to analyze the same kind of atoms polyatomic gas and the inert gas, such as: N2, Cl2, H2, O2, and He, Ne, Ar, etc.
Depending on the component gases of different wavelengths of infrared absorption characteristics of the selective analysis of the work instruments. This absorption spectrum measurement to determine the type of gas; absorption intensity measurements to determine the concentration of the measured gas. Use of infrared analyzer wide range, not only to analyze the gas composition, solution composition can be analyzed, and the high sensitivity, rapid response, to online continuous indication, control system can also be composed. Commonly used in industry for detecting infrared gas analyzer section consists of two parallel optical system composed of the same structure.
A measuring chamber is pipe inspection, one is the reference chamber. Light board chambers by cutting a certain period simultaneously or alternately open and close the optical path. Measured in the measurement chamber of the gas, the gas to be measured with specific wavelengths of light is absorbed, so that the optical path through the measuring chamber into the receiving chamber of the infrared flux reduction. The higher the gas concentration, the gas chamber into the infrared light flux received less; while the flux through the reference chamber is certain, the infrared recipient chamber into the flux is constant. Therefore, the higher the concentration of the measured gas through the measuring chamber and the reference slot provided flux difference is bigger. This flux difference is the amplitude of vibration is a predetermined period projected to the infrared recipient in the gas chamber. Having chamber a few microns thick metal film is separated into two halves, insides sealed with a larger concentration of the test component gas in the absorption wavelength range can absorb all incident infrared rays, so that the pulsating flux becomes periodic variation of the temperature, and then according to the heat range alter of gas equation is converted to pressure changes, and then use the capacitive sensor to detect the amplified processing indicates the measured gas concentration. Except for using capacitive sensors, but also can immediately detect infrared quantum infrared sensor and infrared interference filter for wavelength selection and with tunable laser as the lightweight source, the formation of a new all-solid-type infrared gas analyzer. This analyzer with only one light source, a measuring chamber, an infrared sensor for measurement of gas concentration can be done. In addition, the use of a pool filter with a plurality of different wavelengths CD, were measured simultaneously in multi-component gas quantity of various gases.
And infrared analyzer principle also similar UV analyzer, analyzer, photoelectric colorimeter, the industrially used even more.