Photoionization detector having improved gain and reduced humidity sensitivity

Abstract

A photoionization detector sensor comprised of a plate having top and bottom surfaces and an electrically insulating substrate; at least one opening in the plate for UV light to pass through; a negative electrical potential pattern on at least one of the top and bottom surfaces; and an electron collecting electrode pattern having a wire suspended across the at least one opening. The negative electrical potential pattern includes a linear portion and a polarization plate. The electron collecting electrode pattern further includes a linear portion on the surface opposite the wire. The electrically conductive patterns can further include a grounded potential conductive pattern having a first portion on the top surface and a second portion on the bottom surface.

Dependencies are inferred from the claim text.