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Dual optical path photoionization gas detector and detector

A gas detector and photoionization technology, applied to instruments, measuring devices, scientific instruments, etc., can solve problems such as self-cleaning and manual cleaning, and achieve the effects of shortening response time, increasing service life, and facilitating equipment maintenance and repair

Active Publication Date: 2019-03-19
王宏盘
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, after a period of use, it must be cleaned manually, and it cannot be cleaned by itself.

Method used

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  • Dual optical path photoionization gas detector and detector
  • Dual optical path photoionization gas detector and detector
  • Dual optical path photoionization gas detector and detector

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Embodiment Construction

[0052] The invention discloses a double optical path photoionization gas detector and a detector comprising the detector.

[0053] The inventive idea of ​​the present invention is to use two pid light sources to ionize the gas passing through the ionization chamber at opposite angles under the same gas flow environment, so that the gas entering the ionization chamber is completely and completely photoionized into charged particles .

[0054] Since the present invention sets the two pid light sources oppositely, and the two pid light sources face each other, in addition to their own light output, there are also reflected photons irradiated on the light output window of the opposite pid light source, thus forming a ratio between the windows of the dual optical path pid light source. The photon field with more than twice the photon intensity of the light source can completely make the gas fully and stably ionized completely, making the detector respond faster.

[0055] The oppos...

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Abstract

The invention discloses a dual optical path ionized gas detector and a detection instrument. The detector comprises two photoionization light sources, a substrate and an electrode, wherein a through hole is formed in the substrate; light windows of the two photoionization light sources are oppositely arranged across the through hole, the inner wall of the through hole and the two photoionization light sources define an ionization chamber, and the ionization chamber is communicated with the outside by virtue of an air inlet passage and an air outlet passage; and the electrode extens into the ionization chamber. The detection instrument comprises the detector. The detector disclosed by the invention has the advantages that dual optical path design is smartly adopted, so that radiation intensity of a light source is greatly improved; receiving sectional area of the electrode is increased in a multiplying manner; detection result of the detection instrument can be improved by one measurement accuracy class, measurement response time is also greatly shortened, and response is faster; meanwhile, the detector has a self-cleaning function.

Description

technical field [0001] The invention relates to an optical detection element, especially a double-light-path photoionization gas detector and a detector including the detector, which belong to the optoelectronic instrument manufacturing industry. Background technique [0002] Photoionization Detector (Pid for short) is a general and selective detector. It is mainly composed of an ultraviolet light source and an ionization chamber, separated by a light window that can transmit ultraviolet light in the middle, and the material of the light window is made of alkali metal or alkaline earth metal fluoride. In the ionization chamber, the molecules of the component to be measured absorb the energy of ultraviolet light and ionize. Using lamps with different energies and different crystal light windows, various types of compounds can be selectively determined. After ionization, a small amount of current is generated, which is captured by the electrode, and the current signal is ampl...

Claims

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Application Information

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IPC IPC(8): G01N27/66
CPCG01N27/66
Inventor 王宏盘
Owner 王宏盘
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