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Highly-sensitive nitrogen dioxide sensor

A nitrogen dioxide, high-sensitivity technology, applied in the field of sensors, can solve the problems of high cost and difficulty in manufacturing YSZ substrates

Active Publication Date: 2017-05-24
JIANGSU AOLIWEI SENSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are: the manufacture of YSZ substrate is difficult and the cost is high

Method used

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Embodiment Construction

[0022] Such as figure 1 with 2 As shown, it is a highly sensitive nitrogen dioxide sensor, comprising a cylindrical ceramic tube 4 with a length of 12 mm and an outer diameter of 8 mm; ceramic end caps 2 are inserted in the center of both ends of the ceramic tube 4, and the ceramic tube 4 A spiral heating wire 1 is provided in the cavity 9, and the two ends of the spiral heating wire 1 are led out from the central hole of the ceramic end cap 2 through wires, and an Au reference electrode 3 is arranged on the end surface of one end of the ceramic tube 4, and an Au reference electrode 3 is provided on the other end of the ceramic tube 4. An Au working electrode 6 is provided on the end surface, and the Au working electrode 6 is covered with a TiO sensitive electrode 8. The reference electrode 3 and the sensitive electrode 8 are respectively led to a Pt lead 7, and the outer periphery of the ceramic tube 4 is provided with nanometer indium tin oxide. The sprayed sintered layer 5...

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Abstract

The invention discloses a highly-sensitive nitrogen dioxide sensor in the field of sensors. The highly-sensitive nitrogen dioxide sensor comprises a cylindrical ceramic pipe. Ceramic end caps are inserted in the centers of the two ends of the ceramic pipe, a spiral heating wire is arranged in the ceramic pipe, the two ends of the spiral heating wire are led out of center holes of the ceramic end caps through leads, the end face of one end of the ceramic pipe is provided with an Au reference electrode, the end face of the other end of the ceramic pipe is provided with an Au working electrode, the outside of the Au working electrode is covered with a TiO sensitive electrode, Pt leads are led out of the reference electrode and the sensitive electrode respectively, a spraying sintered layer made of nanometer indium tin oxide is arranged on the periphery of the ceramic pipe, a plurality of gold lines are arranged outside the spraying sintered layer, and the gold lines are connected between the working electrode and the reference electrode. The sensor is not sensitive to water, gasoline and gases such as carbon monoxide, is convenient to manufacture, has sensitivity in detection and can be used for detecting concentration of NO2 in the gaseous environment.

Description

technical field [0001] The invention relates to a sensor, in particular to a sensor for detecting the concentration of nitrogen dioxide. Background technique [0002] Nitrogen dioxide is a poisonous and harmful gas that has a great impact on the environment and human health. Timely and accurate determination of the concentration of nitrogen dioxide in the air is of great significance for detection and environmental protection. At present, CuPc (copper phthalocyanine) is widely used in nitrogen dioxide gas sensors. It has high sensitivity and high selectivity, but its resistance is high and the working current is small, which makes the subsequent sensor circuit design very difficult. At the same time, due to its high resistance, the water vapor in the atmosphere has a great influence on the sensor. Therefore, people have done a lot of research to reduce the resistance by doping, but at the same time, the sensitivity of the sensor will be reduced. Reduction and response time ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 卢革宇孙海鑫梁喜双顾常飞俞斌强
Owner JIANGSU AOLIWEI SENSING TECH
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