| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to technique of carrying out liquid analysis and can be applied in chemical, microbiological, food industry, as well as at enterprises of agro-industrial complex. Device contains metal case, with changeable nozzle. On two sides nozzle has cuts of rectangular form for fastening of polymeric membranes in them. Inside case placed is quartz resonator with two electrodes, fastened with holders. Distance between membranes and resonators electrodes constitutes 1-2 mm. Inside holder placed is system of powering and transmission of sensor signal to analyser (for instance, frequency metre) and electric circuit of generator. ^ EFFECT: increasing sensitivity, accuracy of detection of liquid media composition with total immersion of piezo-sensor into examined liquid, possibility to apply in flow-injection version of liquid analysis, possibility of easy and fast changing and modification of sensor due to presence of changeable nozzle, possibility of immersion in reservoirs of different configuration, possibility of carrying out analysis applying only one work side of piezo-sensor. ^ 1 dwg |
