Honeywell International Inc.

Qidao Lin

Bo Su Chen

Feng Liang

Guangli Xie

Zhanghua Wu

Yong Tang

Yuzhong June Wang

Bo Chen

Embodiments relate generally to a filter, for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter. Embodiments typically comprise a dustproof membrane and a waterproof membrane. Some embodiments may also comprise a splash-proof cap and/or features to reduce negative pressure on the filters.

Dust and splash-proof filter

Embodiments relate generally to a filter (), for example, for attachment onto a gas detector device or a gas sensor, and attempt to improve the efficiency and service life of the filter (). Embodiments typically comprise a dustproof membrane () and a waterproof membrane (). Some embodiments may also comprise a splash-proof cap () and/or features to reduce negative pressure on the filter ().

Embodiments relate generally to systems and methods for shielding electrodes () within a photoionization detector (). A photoionization detector () may comprise an ultraviolet radiation source (); one or more detector electrodes (); one or more collection surfaces () extending vertically from the detector electrodes (); and a shielding material () located between the ultraviolet radiation source () and the one or more detector electrodes (), wherein the ultraviolet radiation () does not directly impinge on at least a portion of the one or more detector electrodes (). The one or more collection surfaces () may comprise a surface area that is not covered by the shielding material ().

Collection surface for electrodes in photoionization detector

A photoionization detector () comprises an ultraviolet radiation source (); one or more detector electrodes (and); and a shielding material () located between the ultraviolet radiation source () and the one or more detector electrodes (and), wherein the ultraviolet radiation () does not directly impinge on any part of the one or more detector electrodes (and). A method for gas detection comprises exposing a photoionization detector () to an environment containing a target gas; and shielding the one or more detector electrodes (and) from direct impingement from the ultraviolet radiation () via the shielding material ().

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Morris Plains, NJ, United States of America

Qidao Lin