POLAROGRAPHIC OXYGEN SENSOR Russian patent published in 2017 - IPC G01N27/48 G01N27/404 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement of values of hydro-chemical-physical parameters of water medium and can be used separately or in multi-channel converter of hydro-chemical-physical parameters of water medium, for measurement of content of dissolved oxygen in water medium, in particular in fresh and sea water during ecological research. According to invention polarographic oxygen sensor comprises body filled with electrolyte with hole in upper part, membrane made of at least two layers of gas-permeable material, tightly closing said hole, two electrodes – cathode adjacent to membrane, and anode placed in volume of electrolyte, lower support layer of membrane made of material allowing unobstructed passage of oxygen molecules dissolved in water to cathode with strength characteristics, providing strength at dynamic and static loads, occurring during operation, and upper selective layer is made in form of polymer coating deposited on support layer.

EFFECT: technical result is reduction of time constant with provision of required service life of sensor.

1 cl, 1 dwg