Low zero drift PID sensor ionization chamber

A zero-point drift and sensor technology, which is applied in the direction of instruments, circuits, discharge tubes, etc., can solve the serious problems of zero-point drift and achieve the effects of avoiding zero-point drift, improving the performance of the whole machine, and high sensitivity

Pending Publication Date: 2019-09-06
南京易科维尔电子科技有限公司
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Problems solved by technology

[0009] The present invention aims at the above-mentioned technical problems, overcomes the shortcomings of the prior art, and provides a PID sensor ionization chamber with low zero-point drift, which solves the serious problem of zero-point drift in the existing ionization chamber, significantly improves the zero-point drift, and achieves practical use requirements

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  • Low zero drift PID sensor ionization chamber
  • Low zero drift PID sensor ionization chamber
  • Low zero drift PID sensor ionization chamber

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Embodiment Construction

[0034] A low zero drift PID sensor ionization chamber provided in this embodiment has a structure such as Figure 4As shown, it includes a casing 2, an ultraviolet lamp 6, and an electrode assembly. The electrode assembly is arranged in the casing 2. The casing 2 has an airflow inlet 10 and an airflow outlet 11. The light irradiation direction of the ultraviolet lamp 6 is coaxial and opposite to the airflow direction, and is opposite to the direction of the airflow. The direction of the electric field formed by the electrode assembly is coaxial.

[0035] The electrode assembly includes an upper electrode plate 3, an upper light-shielding plate 4, a lower electrode plate 8 and a lower light-shielding plate 5. The upper electrode plate 3 and the lower electrode plate 8 are respectively connected to the positive and negative poles of the DC high-voltage power supply to form an electrostatic field and collect the target gas 1 The signal produced after ionization. The lower light ...

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Abstract

The invention discloses a low zero drift PID sensor ionization chamber, and relates to the technical field of gas sensors. The low zero drift PID sensor ionization chamber comprises an outer shell, anultraviolet lamp, and anelectrolyte assembly.The electrolyte assembly is arranged in the outer shell, the outer shell is provided with an air entrance and an air exit, the light exposure direction ofthe ultraviolet lamp is coaxially opposite to the direction of airflow and is in coaxial direction with electric field direction formed by the electrolyte assembly; the electrolyte assembly comprisesan upper plate electrode, an upper light barrier, a lower plate electrode and a lower light barrier, and the upper plate electrode and the lower plate electrode are correspondingly connected with theanode and cathode of high-voltage DC power supply to form an electrostatic fieldand collect the signals generated by theionization of target gas. Three-axis-in-one design of the light path direction,the airflow direction andthe electric field direction is adopted, andthe zero drift generated by direct illumination of ultraviolet radiation to the electrode is avoided.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to a PID sensor ionization chamber with low zero drift. Background technique [0002] PID gas sensor is a new type of sensor used to detect toxic, harmful, flammable and explosive components in gas. The main detection objects are organic gases and some inorganic gases. [0003] At present, on-site analysis of toxic, harmful, flammable and explosive gases is required in many fields, such as environmental monitoring, safety testing and process analysis in production. The main requirements for this type of instrument are: easy to use, meet the requirements of detection accuracy, low price, and meet the environmental conditions of on-site use, etc. To achieve the above indicators, it is necessary to carry out comprehensive innovation on the sensor, one of which is the zero drift of the sensor. correct design. [0004] In the past, the detection of organic matter in gas was mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/64H01J49/16
CPCG01N27/64H01J49/161
Inventor 胡滨杨震夏王军伟
Owner 南京易科维尔电子科技有限公司
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