A gas sensor includes a quartz crystal unit and a sensitive layer formed on the quartz crystal unit and configured to adsorb a gas to be detected, wherein the sensitive layer is porous, and has a particle skeleton made of a plurality of conductive polymer particles and a polyelectrolyte that is at least partially disposed between the adjacent conductive polymer particles.

An odor measurement apparatus includes an odor sensor detecting an odor and an imaging device having a lens portion, in which an imaging direction of the imaging device and an introduction direction of air when the air is guided to a sensor surface of the odor sensor through an introduction port are substantially the same direction. The odor measurement apparatus detects odor substances contained in air using a sensor when an odor is measured, and measures attribute information of a measurement target or the like of the odor. An odor data management apparatus stores and manages odor data measured by the odor measurement apparatus.

A radiation source device includes at least one membrane layer, a radiation source structure to emit electromagnetic or infrared radiation, a substrate and a spacer structure, wherein the substrate and the at least one membrane form a chamber, wherein a pressure in the chamber is lower than or equal to a pressure outside of the chamber, and wherein the radiation source structure is arranged between the at least one membrane layer and the substrate.

A magneto-inductive flow measuring device (1) comprising a measuring tube (2) on which a magnet system and two or more measuring electrodes (3) are arranged and/or secured, wherein the measuring tube (2) has in- and outlet regions (11, 12) with a first cross section and wherein the measuring tube (2) has between the in- and outlet regions (11, 12) a middle segment (10), which has a second cross section, wherein the measuring electrodes (3) are arranged in the middle segment (10) of the measuring tube (2), wherein the middle segment (10) at least in the region of the measuring electrodes (3) is surrounded by a tube holder (15), which guards against cross-sectional deformation of the second cross section.

An acoustic wave detector may include: an exterior housing with an exterior housing wall, a gas chamber located within the exterior housing and configured to receive a gas therein. The exterior housing wall may include an aperture providing a gas passage between the gas chamber and the exterior of the acoustic wave detector. The acoustic wave detector may further include an excitation element configured to selectively excite gas molecules of a specific type in the gas received in the gas chamber in a time-varying fashion, thereby generating acoustic waves in the gas, and an acoustic wave sensor configured to detect the acoustic waves generated in the gas and acoustic waves generated outside of the acoustic wave detector. The acoustic wave sensor may have an acoustic port overlapping with the aperture in the exterior housing wall. The acoustic wave sensor may include a mechanical structure displaceable by the acoustic waves to be detected, wherein a displacement of the mechanical structure is indicative of characteristics of the acoustic waves to be detected.

A method for preparing original data of an odor image includes a measurement result acquiring step of acquiring each measurement result measured with respect to the odor substance included in the sample in each of a plurality of sensor elements of an odor sensor, and a data processing step of generating the original data for representing the odor of the sample in the image by processing each of the acquired measurement results. Each of the sensor elements has different detection properties with respect to the odor substance. In a case where each of the original data items is represented in a small image, the odor of the sample is represented in an odor image in a predetermined display mode in which small images are assembled, and each of the small images is varied in accordance with the magnitude of the value of each original data item.

An acoustic sensor comprises a side wall closed at each end by an end wall to form a cavity which, in use, contains a fluid. At least one transmitter and at least one receiver are operatively associated with one of the end walls. A maximum half width, a, of the cavity and a height, h, of the cavity satisfies the following inequality: a/h is greater than 1.2. In use, the transmitter causes oscillatory motion of the region of the end wall operatively associated with the transmitter, in a direction substantially perpendicular to the plane of the end walls such that the perpendicular oscillations of the end walls drive substantially in-plane oscillations of the fluid pressure in the cavity. The substantially in-plane oscillations in the pressure of the fluid drive substantially perpendicular oscillatory motion of the region of the end wall operatively associated with the receiver, resulting in an electrical signal from the receiver.

A surface acoustic wave sensor in which instrument drift resulting from accumulated surface contamination is minimized. The sensor includes a piezeoelectric substrate defined by an outer surface and a plurality of interdigitated electrodes mounted thereon. The electrodes are defined by one or more exposed portions and an unexposed portion abutting the outer surface of the piezoelectric substrate. An inert coating layer on the outer surface of the piezoelectric substrate and the exposed portions of the electrodes is provided, and can be a perfluoro-silane type compound, a perfluoro-trichloro-silane type compound, a perfluoro-acrylate type compound, polytetrafluoroethylene, or heptadecafluorodecyltrimethoxysilane.

The present disclosure is related to a photoacoustic sensor modular assembly. An example interconnect module includes a support structure configured to be situated between an emitter module of the photoacoustic sensor and a detector module of the photoacoustic sensor. The emitter module may include an emitter component and the detector module may include a detector component. The interconnect module may include a conductive element configured to connect to at least one of the emitter component or the detector component.

A thermal emitter includes a freestanding membrane supported by a substrate, wherein the freestanding membrane includes in a lateral extension a center section, a conductive intermediate section and a border section, wherein the conductive intermediate section laterally surrounds the center section and is electrically isolated from the center section, the conductive intermediate section including a conductive semiconductor material that is encapsulated in an insulating material, wherein the border section at least partially surrounds the intermediate section and is electrically isolated from the conductive intermediate section, and wherein a perforation is formed through the border section.