A method and a sensor for detecting or measuring at least one specific component among a plurality of components present in a gaseous or liquid mixture by a sensor having at least one capturing cell with a high-electron mobility transistor including a source and a drain with a grid inserted between the source and the drain, a voltage being applied between the source and the drain, and a current intensity in the capturing cell being recorded. The voltage between the source and the drain is controlled, which varies the intensity of the current, the voltage being controlled according to a voltage model predetermined by experience in order to provide a profile with an intensity which is characteristic of said at least one specific component.

The invention provides: a gas sensor device that is capable of removing a component adsorbed on a gas sensor by relatively simple means and easily restoring a signal baseline of the gas sensor to a constant state; and a method for removing a gas component. The gas sensor device according to an embodiment of the invention includes a gas sensor and cleaning means that contains a liquid for cleaning the gas sensor. The gas sensor includes a sensor main body that is capable of detecting a characteristic parameter of a component present in a gas phase or a liquid phase, and a sensitive membrane that is coated on a surface of the sensor main body and is durable against the liquid.

A portable chemical contaminant detection system and related methods are provided. The contaminant detection system includes a portable detector having a probe and detector circuitry for detecting a predetermined contaminant in a sample. The system may also include a mobile device configured to wirelessly receive contaminant detection data from the portable detector and transmit the contaminant detection data from the portable detector to processor in real-time. The mobile device may be further configured to receive and display on the mobile device real-time contaminant level data processed by the processor from the contaminant detection data.

There is provided a gas analyzer apparatus that analyzes inflowing sample gas. The gas analyzer apparatus includes a filter unit that filters the sample gas, a detector unit that detects the result of filtering, a housing that houses these elements, and a control unit that controls the respective potentials of these elements. The control unit includes a cleaning control unit that sets the respective potentials of the filter unit, the detector unit, and the housing to cleaning potentials that draws in, as plasma for cleaning purposes, process plasma from a source that supplies the sample gas or plasma generated by a plasma generation unit.

A portable chemical contaminant detection system and related method is provided. The detection system includes a detector having one or more probes and associated detector circuitry that is in communication with a mobile device. The system is in communication with a remotely located server, where the detection system transmits contaminant detection signals while measuring a fluid from a product or a container of a chemical used on the product. The contaminant detection signals are transmitted in real-time and the detection system receives contaminant level information determined by the server. The server may process data from multiple probes to track multiple contaminants or a single contaminant based on the multiple different probe data from a single detector. The system displays real-time decontamination feedback and displays process completion notification or automatically implements decontamination shut-off. The server tracks location information and contaminant levels for products and communicates with third party certification servers.

A method for the qualitative and/or quantitative measurement of odors present in a chamber for transformation (cooking or fermentation) of a product makes it possible to prevent the measurement environment from contamination by measurement-interfering elements produced by the transformation and released in the chamber for transformation. The method makes use of a chamber for transformation, for example an oven, and of an electronic nose, pipes a fluidic system, and a removal chamber for removing the measurement-interfering elements. The method includes a measurement mode M and a cleaning mode N. The cleaning mode comprises the following steps: -N0- optionally, flushing the chamber for transformation, preferably by ventilating it; -N1- flushing the measurement chamber with a fluid, preferably ambient air; -N2- flushing the removal chamber with a fluid, preferably ambient air; and -N3- optionally, transferring at least a portion of the flushing fluid from the removal chamber into the chamber for transformation.

Methods and systems for identifying contamination of an electrochemical sensor (10) and cleaning the electrochemical sensor (10) are provided. A method may comprise scanning the sensor (10) for the first time using CV to generate a reference set of readings; scanning the sensor (10) for the second time after the sensor (10) has been employed; comparing a second set of readings from the second CV scan to the reference set of readings; when the second set of readings is different from the reference set of readings, determining that the sensor (10) potential has shifted; scanning the sensor (10) for the third time to clean one or more elements of the sensor (10); scanning the sensor (10) for the fourth time; comparing a fourth set of readings from the fourth CV scan to the second set of readings; and determining that the potential of the sensor (10) has shifted due to pollution of the sensor (10), and/or that the sensor (10) can be further cleaned.

A species-specific gas sensor and monitor comprising a light source, a sample enclosure or measurement chamber, an optical interface between the light source, the sample and the detection system, electronics that integrate the light source and the detection system, and computational components, such as an onboard microprocessor for calculation of the gas composition and communications between the sensor and the vehicle electronics. The species-specific gas sensor of the present invention can be used to target gases, such as nitric oxide (NO), nitrogen dioxide (NO.sub.2) ammonia (NH.sub.3), and sulfur dioxide (SO.sub.2) which are measurable in the UV spectrum.

Various example embodiments described herein relate to a window heating apparatus. The window heating apparatus comprises a frame, a heater assembly disposed on the frame, and a glass window. The heater assembly comprises a base having a first side and a second side and defines a first opening. The heater assembly comprises a Printed Circuit Board (PCB) laminated on the first side of the base along an inner edge of the base. The PCB defines a second opening, wherein the first opening and the second opening are aligned coaxially. The glass window is disposed on the base and the second side of the base is in direct contact with the glass window.

Device for measuring the concentration of gases in exhaled air and measurement procedure used, such device comprising a first air inlet (1), a second air inlet (3) with a nitric oxide filter (4), a pump (5), a nitric oxide sensor (6), a first valve (8) located downstream from the first air inlet (1) and upstream from the sensor (6), a second valve (9) located downstream from the second air inlet (3) and upstream from the sensor (6), a third valve (10) located downstream from the sensor (6) in a first fluid line that conducts air to a first air outlet (12), and a fourth valve (11) located downstream from the sensor (6) in a second fluid line that conducts air to a second air outlet (13), wherein the pump (5) is located in the second fluid line.