A pressure sensor includes a cylindrical case defining an inner space in communication with an outer space; a pressure detector provided in the inner space and configured to detect a gauge pressure of a target fluid; an atmospheric pressure detector configured to detect an atmospheric pressure; and an electronic component configured to calculate an absolute pressure of the target fluid on a basis of the gauge pressure and the atmospheric pressure. The absolute pressure is obtained without requiring airtightness of the case between the inner space and the outer space, and thus, there is no requirement for a seal member to be included between the inner space and the outer space.

Provided is a pressure sensor including: a housing portion including a housing part housing a pressure sensor module, a concave portion facing the housing part across an inner wall, and a through hole part formed in the inner wall; a filter covering the through hole part; and a cover mounted on the housing portion while covering the concave portion and including cutout parts. The concave portion includes a bottom surface that is one surface of the inner wall, and two side surfaces perpendicular to the bottom surface and opposed to each other. The cover is formed with a rectangular upper plate and two rectangular side plates continuous with edges of the upper plate in a vertical direction and opposed to each other. The upper plate is arranged to face the bottom surface. The two side plates are arranged between the two side surfaces opposed to each other.

A pressure sensor (10) for a fluid circuit, in particular, of a motor vehicle, the sensor comprising: a body (12) comprising a fluid inlet (14), a fluid outlet (16) and an internal chamber (18) for connecting the inlet to the fluid outlet for the fluid flow in said body, an elastically deformable membrane (20) located in said chamber and comprising a first face (20a) intended to be in contact with the fluid flowing in the body, characterised in that it further comprises: a resonant circuit (22) of the RLC type located in said chamber and associated with a readout circuit (23) located outside the chamber (18).

A pressure sensor with calibration device includes a casing, a diaphragm, a sensing element, a medium, and at least one calibration element. The diaphragm is disposed on the casing, wherein the casing and the diaphragm define an accommodating space. The sensing element is disposed in the casing. The medium is filled in the accommodating space and in contact with the sensing element. The at least one calibration element is adjustably disposed at the casing and extended into the accommodating space to be in contact with the medium, wherein when the at least one calibration element is moved relative to the casing in a direction toward the accommodating space or in a direction away from the accommodating space, the at least one calibration element changes the pressure applied to the medium. The pressure sensor with calibration device adjusts the pressure value sensed by the sensing element via the calibration element.

A sub-slab monitor includes a housing configured to extend through a foundation such that an upper surface of the housing is in contact with an indoor air environment and a lower surface of the housing is in contact with a sub-slab environment. A pressure sensor contained within the housing is configured to measure a differential pressure between the indoor air environment and the sub-slab environment, and electronics contained within the housing include a communication circuitry for communicating differential pressure data from the pressure sensor to a computer and a battery. A system and method for sub-slab monitoring includes providing and installing one or more sub-slab monitors and uploading differential pressure data from the one or more sub-slab monitors onto a central computer.

A pressure sensor for capturing pressures of up to 1000 bar includes a sensor assembly and a housing sleeve for accommodating the sensor assembly. Furthermore, the pressure sensor includes a membrane in mechanical connection with the housing sleeve and operative connection with the sensor assembly for transmitting a pressure. Pressure acts in an axial direction on the membrane and in a radial direction on the housing sleeve. The housing sleeve includes a constriction which locally increases an elasticity of the housing sleeve. The housing sleeve includes a reinforcement which locally reduces an elasticity of the housing sleeve. At high pressure, locally induced changes in the elasticity of the housing sleeve result in a reversible change in length of the housing sleeve, both in the radial direction and in the axial direction.

A pressure sensing metal diaphragm configured for deforming according to a pressure is provided, including: a main body, extending flat, including a through hole and a go-through structure configured for insertion of a movable. A pressure sensing diaphragm assembly including the pressure sensing metal diaphragm and a pressure sensing non-metal diaphragm is further provided, wherein the pressure sensing non-metal diaphragm covers the go-through structure. A pressure gauge including the pressure sensing diaphragm assembly is further provided.

An instrument enclosure includes top and bottom sections, the bottom section having a first part fastened to a second part, and hinges hinging the top and bottom sections to enable the top section to rotate between a close positioned and an open position. When closed, the instrument enclosure defines an enclosed space suitable for receiving a field instrument. The bottom section may be fastened to a standpipe or to a bracket fastened to the standpipe. The bottom section may define an opening configured to receive the standpipe and/or an opening to receive process line tubing carrying process line signals to the field instrument. The field instrument may be affixed to an end portion of the standpipe received in the enclosed space, removably attached to an interior of the instrument enclosure, or affixed to a mounting plate attached to the standing pipe.

Pressure measurement apparatus, assemblies and methods are described. According to one aspect, a pressure sensor assembly includes a substrate, a first adhesive member adhered to the substrate, a sensor support adhered to the first adhesive member, a second adhesive member adhered to the sensor support, and a pressure sensor adhered to the second adhesive member and aligned with apertures of the substrate, first adhesive member, and second adhesive member, and the pressure sensor is configured to vary an output signal as a result of changes in pressure of a received air stream, and the output signal is indicative of the changes in pressure of the air stream.

Embodiments of the present disclosure are directed to field device housing assemblies and field devices that include the housing assemblies. One embodiment of the field device housing assembly includes a main housing, a cover having a proximal end connected to the main housing, a transparent panel and a retainer ring. An interior wall of the cover includes a threaded section that is concentric to a central axis, and a flange extending radially inward from the interior wall toward the central axis. The transparent panel is received within a socket defined by the interior wall and the flange. The retainer ring is secured to the threaded section of the interior wall. The transparent panel is clamped between the retainer ring and the flange.