Portable direct-reading type power-free hydrogen-sulfide gas detector and indicating matter preparation method
A gas detector and direct-reading technology, which is applied in the direction of material analysis by observing the influence of chemical indicators, analysis by using chemical indicators, and analysis by making materials undergo chemical reactions, can solve time-consuming and high-cost problems. , complex monitoring procedures and other issues, to achieve the effect of high sensitivity and good precision
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[0022] The detection component of the badge-shaped, direct-reading, non-powered hydrogen sulfide detector is tubular, and the indicator substance is installed in the tube. The substance is in powder form. When it is placed in a gas environment containing hydrogen sulfide, hydrogen sulfide will The main body of the gas phase diffuses into the tube through the control membrane. When it enters the tube, it reacts rapidly with the thin layer of the substance adsorbed on the carrier surface (the reaction constant is very large, and the special effect and selection are unique). After the reaction, the indicator substance is dark gray. Due to the rapid reaction, a clear, very high-contrast interface is formed between reacted and unreacted species. Because the indicator substance layer is very thin and uniform, the concentration of hydrogen sulfide at the interface is always zero. In this way, there is always a hydrogen sulfide gas concentration difference (that is, driving force) bet...
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