Portable photo-ionization gas detector

A gas detector and photoionization technology, applied in the field of gas detection devices, can solve the problems of high cost, low detection accuracy and sensitivity, and large volume, and achieve light weight, improved detection accuracy and sensitivity, and high sensitivity Effect

Inactive Publication Date: 2009-12-16
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of low detection accuracy and sensitivity, large volume and high cost in existing photoionization gas detectors, the present invention provides a portable photoionization gas detector

Method used

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  • Portable photo-ionization gas detector
  • Portable photo-ionization gas detector
  • Portable photo-ionization gas detector

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Embodiment Construction

[0016] Such as figure 1 , 2 As shown, the portable photoionization gas detector includes an electrodeless ultraviolet lamp 1, an ionization chamber 5 with a built-in bias electrode plate 2 and a collecting electrode plate 4 fixed to the optical window of the electrodeless ultraviolet lamp 1, and a control circuit, The opposite side of the ionization chamber 5 and the optical window of the electrodeless ultraviolet lamp 1 is fixed with an air inlet end cover, and an air outlet 6 is opened on the wall of the ionization chamber 5 near the electrodeless ultraviolet lamp 1 side, and the bias in the ionization chamber 5 The electrode plate 2 and the collecting electrode plate 4 are arranged in parallel and face to face, and are parallel to the light emitting direction of the electrodeless ultraviolet lamp 1 (that is, the direction of the electric field between the bias electrode plate 2 and the collecting electrode plate 4 is the same as the light emitting direction of the electrode...

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Abstract

The invention relates to a gas detector, in particular to a portable photo-ionization gas detector, which solves the problems of low detection accuracy and flexibility existing in the prior photo-ionization gas detector. The detector comprises an electrodeless ultraviolet lamp and an ionization chamber of which the inside is provided with two offsetting electrode plates and a collecting electrode plate, wherein the ionization chamber is fixedly provided with a gas inlet end cover and provided with a gas outlet, the electrode plates in the ionization chamber are arranged in parallel and front faces of the electrode plates face each other, and are parallel to a light-transporting direction of the electrodeless ultraviolet lamp; the distance between the two offsetting electrode plates is equal to the height of an optical window of the electrodeless ultraviolet lamp, and the collecting electrode plate is arranged between two offsetting electrode plates; the gas inlet end cover is provided with a gas inlet window where a metallic micro dust filter net and a double-layer microporous filter membrane are arranged. The gas detector has the advantages of simple and reasonable structure, small volume, convenient carrying, accurate detection data, high flexibility and wide application range; moreover, gas detector also meets the real-time and continuous detection requirements in the operating field.

Description

technical field [0001] The invention relates to a gas detection device, in particular to a portable photoionization gas detector. Background technique [0002] The development of modern organic chemical industry, petroleum refining and other industries has provided human beings with more and more new materials and new products, but at the same time it has also brought more and more toxic and harmful substances. In addition to our common inorganic gases in industrial safety, such as carbon monoxide, hydrogen sulfide, nitrogen oxides, etc., organic substances that are more toxic and harmful have also begun to attract widespread attention. If you work for a long time in an environment containing these substances (vapours, volatiles), it will cause lifelong hazards to workers. In addition, when various emergency accidents occur, quickly confirming the leak point, confirming the scope of pollution, and confirming the development trend of the accident are the primary conditions f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64H01J49/26
CPCG01N27/64
Inventor 刘俊梁庭薛晨阳熊继军张文栋孙瑞霞殷亚飞
Owner ZHONGBEI UNIV
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