Described herein is an ammonia compound indicator comprising an adhesive and a chemochromic compound disposed therein. Also described are methods of making the aforedescribed elements and methods for indicating the presence of ammonia.

The present invention provides a corrosive environment monitoring method capable of short-term to long-term identification of the type of corrosive gas, without requiring a power source such as a commercial power source or a storage battery, in a narrow place inside an equipment housing of an electric or electronic device to be evaluated. The corrosive environment monitoring method of the present invention involves using a corrosion sensor that has a passage structure in which one end is closed and the other end is an opening, wherein a part of the upper and lower surfaces or left and right surfaces with respect to the opening is formed by a transparent substrate, and a metal thin film is formed on the surface of the transparent substrate that is in contact with the corrosive gas flowing in from the opening, observing the degree of discoloration of the metal thin film through the transparent substrate, and identifying the type of the corrosive gas from the relationship between the degree of discoloration and the type of corrosive gas that has been observed in advance.

A method of forming a sensor includes providing a substrate, forming a polymer aerogel layer on the substrate, and infusing the polymer aerogel layer with sensing molecules.

The disclosure describes a probe comprising an azo-calixarene complexed with an anion. The anion may be a fluoride ion or a carbonate ion. The probe may be used to sense and/or capture carbon dioxide.

A sensor has a transparent polymer aerogel, and sensing materials dispersed into the transparent, polymer aerogel, where the sensing materials change color in response to environmental conditions. A method of forming a sensor includes providing a substrate, forming a polymer aerogel layer on the substrate, and infusing the polymer aerogel layer with sensing molecules.

An aircraft pressurized air system and method is disclosed. The system includes a compressor that receives and compresses outside air, and an air cycle machine that receives compressed air from the compressor and directs conditioned air to an aircraft pressurized zone. The system also includes a contaminant sensor disposed along an air flow path between the compressor and the aircraft pressurized zone, comprising an optical guide, a metal organic framework on an exterior surface of the optical guide in operative fluid communication with air from the air flow path, a light source in communication with the optical guide at a first end of the optical guide, and a light detector in communication with the optical guide at a second end of the optical guide.

A method of collecting a fluid sample includes flowing the fluid sample into an isolating container, wherein the isolating container includes a reactant material; removing a component from the fluid sample by reacting the component with the reactant material; and collecting the fluid sample leaving the isolating container into a sample container.

A battery includes a first power generating element including a first electrode layer and a first counter electrode layer, a first current collector that is in contact with the first electrode layer, a second current collector that is in contact with the first counter electrode layer, a first sealing portion that seals a gap between the first current collector and the second current collector, a first void disposed between the first sealing portion and the first power generating element, and a first gas detection unit that detects gas. The first gas detection unit detects “the gas in the first void.”

An aircraft pressurized air system and method is disclosed. The system includes a compressor that receives and compresses outside air, and an air cycle machine that receives compressed air from the compressor and directs conditioned air to an aircraft pressurized zone. The system also includes a contaminant sensor disposed along an air flow path between the compressor and the aircraft pressurized zone, comprising an optical guide, a metal organic framework on an exterior surface of the optical guide in operative fluid communication with air from the air flow path, a light source in communication with the optical guide at a first end of the optical guide, and a light detector in communication with the optical guide at a second end of the optical guide.

A microfluidic device for measuring an amount of an oxidant in a solution is disclosed. The device includes a microfluidic substrate configured to mix a solution sample to be analysed with an indicator dye solution containing an indicator dye under conditions suitable for some of the indicator dye to react with any oxidant in the solution to produce an oxidant measurement solution having a reduced indicator dye concentration that is indicative of the amount of oxidant in the solution, the microfluidic substrate including an optical reading window through which the reduced indicator dye concentration in the oxidant measurement solution can be measured optically.