Dissolved oxygen monitoring sensor

Abstract

The invention relates to a dissolved-oxygen monitoring sensor, including filter net, cathode, shell with top cover, anode, thermistor and oxygen transmitting film, where the side wall of the shell is set with electrolyte filling mouth, under which is the oxygen transmitting film installed, and the shell above the oxygen transmitting film holds the electrolyte; the cathode, anode and thermistor are installed in the shell, where the anode is a spiral structure, the cathode is a structure formed by linking the ring with the straight line, the cathode, anode and thermistor are linked with external cable through the electrode lead wire hole, air gap and sealed plug, respectively; under the oxygen transmitting film, the filter net is installed by the shield, and a liquor storing cavity is formed between the oxygen transmitting film and the filter net.

Description

technical field [0001] The invention relates to a dissolved oxygen monitoring technology, in particular to a dissolved oxygen monitoring sensor. Background technique [0002] When measuring dissolved oxygen in the water environment, a dissolved oxygen sensor is used. Especially in today's fast-growing aquaculture industry, real-time monitoring of dissolved oxygen in aquaculture waters is especially required. [0003] In the existing dissolved oxygen detectors, the anode is mostly linear or triangular prism, the electrode surface area is small, the detection accuracy and sensitivity are low, and the cylindrical filter is used. Due to the large filter holes, organisms and debris often enter the detection system. Affect the detection, and there are often organisms and debris attached, thus blocking or even damaging the oxygen permeable membrane, so that the monitoring is interrupted. Generally, it can only be tested for a short time, and its service life is short. The cathod...

AI Technical Summary

Problems solved by technology

[0003] In the existing dissolved oxygen detectors, the anode is mostly linear or triangular prism, the electrode surface area is small, the detection accuracy and sensitivity are low, and the cylindrical filter is used. Due to the large filter holes, organisms and debris often enter the detection system. Affect the detection, and there are often organisms and debris attached, thus blocking or even damaging the oxygen permeable membrane, so that the monitoring is interrupted

Generally, it can only be tested for a short time and has a short service life.

The cathode is a ring structure, the lead part is in the shell, and the node is also in the liquid in the shell, which is not only easy to damage, but also the node resistance generated by it will affect the measurement parameters; in addition, the cathode current is not ideally transmitted in the liquid; the cathode , anode, and thermistor connection wires are fragile and unreliable. They are used for long-term monitoring of the water environment, and the sealing is also problematic.

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