High-precision gas detector

摘要: The invention relates to an ethanol gas detector based on SnO2 composite nano fiber. is in a side-heating structure, and comprises alumina ceramic tube having three parallelly anduniformly-distributed circular gold electrodes provided at external surface, sensitive material coated the surface of tube, nickel-chromium alloy heating coil passing through two platinum filament pins are connected with each electrode, fiber prepared by static spinning method, porous hollow spheres, ZnO wire, cellulose acetate Preferably, sphere-doped WO3 CuO.By doping, doped sphere prepared, sphere, have synergistic effect, precision isgreatly increased.