Multifunctional gas sensor

Abstract

The invention discloses a multifunctional gas sensor, comprising a laser emitter and a laser receiver, wherein a gas chamber is composed of a gap between a solid conductive transparent glass rod and a hollow metal tube, the solid conductive transparent glass rod is connected to the positive electrode of a bias voltage, the hollow metal tube is connected to the negative electrode of the bias voltage, a polishing surface for reflecting laser is arranged in an interval region of a catalyst film, the two ends of the gas chamber are sealed, one end is connected with a gas inlet tube, the other end is connected with a gas outlet tube, the laser emitter and the laser receiver are respectively disposed at the two ends of the solid conductive transparent glass rod, when the laser emitter and the laser receiver are turned on, the laser emitted by the laser receiver is obliquely incident from one end of the solid conductive transparent glass rod, and is irradiated onto the laser receiver disposed at the other end of the solid conductive transparent glass rod after being reflected by the polishing surface for multiple times. The multifunctional gas sensor disclosed by the invention has two functions of a laser gas sensor and an ionized gas sensor.

Description

technical field [0001] The invention relates to a plasma sensor, especially a multifunctional gas sensor. Background technique [0002] There are two kinds of existing gas sensors, one is a laser gas sensor, and the other is an ionization sensor. The detection principle of the laser gas sensor is: use the laser transmitter to emit laser light to irradiate the measured gas, and the laser receiver receives the laser light after irradiating the measured gas, and analyze and detect the measured gas according to the absorption effect of the measured gas on the laser of a specific wavelength Concentration of gas (such as "TO package laser and gas sensor" whose application publication number is CN 107994456A, "laser gas sensor" whose authorization announcement number is CN 205317667U, "a laser methane gas sensor" whose application publication number is CN 107991238A) ; The detection principle of the ionization sensor is: by applying a voltage between the electrode plates, the meas...

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Problems solved by technology

[0003] In practical applications, sometimes it is necessary to use a laser gas sensor, and sometimes it is necessary to use an ionization sensor. Since the existing above-mentioned two gas sensors cannot be used universally, it needs to be replaced frequently, with a large workload and low efficiency, or a laser sensor can be installed at the same time. Type and ionization gas sensors, the cost is higher

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