Sorbent Media Exhaustion Indicator

摘要

A Sorbent media exhaustion indicator produces color change when the sorbent media is saturated. The indicator's fluid inlet attach to the fluid outlet of a sorbent media device such as filter. It includes is a hollow tube or a hollow polyhedron prism that fluids flow freely through it. The indicator also includes colorimetric sensor that changes color when exposed to trace amount of toxic fluids and a trap member that prevent toxic fluids exist in the surrounding environment from changing the color of the colorimetric sensor, hence preventing false indication of sorbent media exhaustion. Another function of the trap member is to trap toxic fluids from exiting to the surrounding environment when toxic fluids breakthrough the sorbent media device.

主权项

1. A sorbent media exhaustion indicator for indicating the saturation and exhaustion of sorbent media devices by forming visual color change, said sorbent media exhaustion indicator comprising:
a transparent housing member (140) having the shape of hollow cylinder or hollow polyhedron prism; at least two porous plugs (110) function to localize the different components of sorbent media exhaustion indicator while allowing free flow of fluids through the sorbent media exhaustion indicator; at least one colorimetric sensor (130) that changes color upon exposure to toxic fluids, said colorimetric sensor having one support member and at least one active ingredient member; at least one trap member (120) function to prevent fluids from entering the sorbent media exhaustion indicator from surrounding environment; at least one auxiliary support member (133) functions to support and localize the colorimetric sensor in place and regulate fluids flow through the sorbent media exhaustion indicator; at least one porous plug guard member (141) positioned above the top porous plug (110), sealed to or screwed into the inside wall of the housing member (140); an auxiliary trap member (150) function to increase the capacity of trapping contaminant fluids from escaping to the surrounding environment when sorbent media breakthrough occurs and trapping contaminant fluids in the surrounding environment from entering the sorbent media exhaustion indicator; and a remote electronic alarm member (160) that sends a wireless message and generates an audio alarm to alert the user when the sorbent media exhaustion indicator changes color, said remote electronic alarm member (160) comprises an electronic alarm subsystem (161), a wireless link (166) and base station (167).