Abstract: An artificial sensor comprises at least one substrate, and a plurality of flow sensors disposed on the at least one substrate for providing a plurality of spatial-temporally varying signals representing a hydrodynamic stimulus. The plurality of flow sensors are spatially distributed on the at least one substrate. A processor is coupled to the plurality of flow sensors for receiving the signals and determining spatial-temporal information from the received signals.

Abstract: A pressure-sensor device (1) comprises: —a pressure-sensitive component (9) having a body, defined in which is a blind cavity, and having a membrane portion (9a), operatively associated to which is a detection element (R); and —a connection structure (2), which has a duct in communication with the cavity of the pressure-sensitive component (9) and is to receive a fluid, a pressure of which is to be detected. The connection structure (2) comprises a supporting body (2a) of the pressure-sensitive component (9), which defines a respective passage (2b), and a compressible element (12, 18) that is designed to be in contact with the fluid and is configured for compensating possible variations of volume thereof. The compressible element (12, 18) is positioned at least in part within the cavity (11) of the pressure-sensitive component (9) and/or in a stretch of the passage (2b) of the supporting body (2a) that is close to the cavity (11) of the pressure-sensitive component (9).

Abstract: A modular sensor assembly for performing measurement or calibration is disclosed, comprising a sensing module comprising a threaded spigot, a first slip ring conductive track, and a second slip ring conductive track; a base module comprising a threaded receptacle, a first conductor, and a second conductor; wherein the sensing module is detachably mounted to the base module by rotating the threaded spigot into the threaded receptacle thereby forming a first electrical connection between the first slip ring conductive track and the first conductor, and a second electrical connection between the second slip ring conductive track and the second conductor.

Abstract: A vehicular collision detection apparatus mounted to a vehicle comprises: a door beam that is arranged in a partitioned region partitioned between a door outer panel of a vehicle door, and a door inner panel of the vehicle door, and is displaced in accordance with a deformation of the door outer panel at the time of a vehicular collision; a cylindrical member that is arranged in the partitioned region and is compressed by the door beam at the time of the displacement of the door beam; a sealed cavity provided to the cylindrical member; a pressure sensor configured to detect a pressure fluctuation of the cavity; a deriving portion configured to derive a displacement amount and displacement velocity of the door beam, based on the pressure fluctuation detected by the pressure sensor; and a determining portion configured to determine collision particulars of the vehicle based on the displacement amount and displacement velocity of the door beam derived by the deriving portion.

Abstract: A device (20) comprising a pressure measurement surface (28) functionally attached to a proof body (22) and a rigid component (30), functionally attached to the proof body (22), the measurement surface (28) forming a surface of the rigid component (30). In addition, the device comprises a support (38), functionally separated from the proof body (22), of generally annular shape, housing the rigid component (30) and a flexible mass (40) radially inserted between the support (38) and the rigid component (30) such that the contour of the measurement surface (28) is bounded by the flexible mass (40), this flexible mass (40) adhering to the support (38) and to the rigid component (30).

Abstract: A dry, front-flush, pressure measuring transducer, which enables reliable measurements over a large temperature range. The transducer includes: a process connection made of a stainless steel and serving for securing the pressure measuring transducer to a measuring site; and a pressure sensor module, including a holder of stainless steel, into which a metal separating diaphragm is set front-flushly by means of a purely metal connection. A pressure to be measured acts on the separating diaphragm during measurement operation. The holder is set front-flushly by means of a purely metal connection into the process connection. The pressure sensor module further includes a titanium disk which is carried by the holder. A sapphire carrier with integrated silicon sensors is secured to the titanium disk.

Abstract: A pressure sensor includes: a housing having a pressure introduction port; and a connector case integrated with the housing. The connector case includes: a protruding portion that protrudes in the pressure introduction port along with the introduction direction from one end of the connector case, and has a concavity hollowed in a direction perpendicular to the introduction direction; a sensor chip having a pressure gauge on one surface of the chip in the concavity; a terminal having one end inserted and molded in the connector case; and a bonding wire that electrically connects the sensor chip and the one end of the terminal. The connector case seals a connection portion between the bonding wire and the terminal, a connection portion between the boding wire and the sensor chip, and the bonding wire.

Abstract: The invention relates to a pressure gauge having a cylindrical housing to which a bushing is fixed, which penetrates the housing. The pressure gauge is furthermore provided with a pressure sensor together with an allocated electronic evaluation unit, said sensor is operatively connected to a pressure port coaxially positioned to the longitudinal axis of the housing. A turnable adjustment pin to engage with an adjustment device of the electronic evaluation unit in the pressure gauge is accommodated in the bushing in a liquid-proof manner, and is equipped with holding means by means of which it is undetachably secured to the bushing.

Abstract: A compressor unit is particularly suitable for compressing air in portable and/or transportable devices. The compressor unit includes a motor, a compressor, and a pressure gauge (manometer). The pressure gauge is connected to the compressor unit through a threaded connection and the supply of the pressure medium to the pressure gauge travels through the threads.

Abstract: An electronic apparatus with a sensor which can effectively realize the miniaturization of an exterior case, and can also enhance the layout property of the pressure sensor is provided. An electronic apparatus with a sensor which can reliably ensure the sealing property of an exterior case is also provided. The electronic apparatus with a sensor includes: an exterior case; a sensor unit which is arranged in the inside of the exterior case and detects pressure; and a sensor holding frame which is arranged between the exterior case and the sensor unit, and is provided for mounting the sensor unit on the exterior case. The sensor holding frame includes: a sensor accommodating portion which accommodates the sensor unit and is provided with a pressure chamber into which the pressure is taken in front of a sensor body of the sensor unit; and a pressure introducing passage through which pressure is introduced into the pressure chamber from the outside of the exterior case.

Abstract: A pressure transmitter for measuring a pressure of a process fluid in an industrial process, includes a pressure sensor having an output related to an applied pressure. Measurement circuitry coupled to the pressure sensor is configured to provide a transmitter output related to sensed pressure. A pressure coupling face having an opening therein is arranged to transfer the applied pressure to the pressure sensor. A pressure coupling flange having a flange face abutting the pressure coupling face is configured to convey the process fluid to the opening of the pressure coupling face. Features are provided to control distribution of a leading force across the pressure coupling face and the flange face.

Abstract: The present invention is a breathing improvement monitor that continuously measures involuntary breathing. The monitor is a sensor apparatus that is attached to a patient's mask which is connected to the monitoring apparatus. The sensor may be reusable and attachable and detachable to a mask or it may be an integral part of a breathing mask. The sensor technology may be any type sufficient in the art, including but not limited to solid state sensors, transducers, electromagnetic microturbines and the like. Since the mask does not have to be removed and the sensor provides constant signal to the monitoring apparatus, a real time status of a patient's involuntary breathing capability may be determined for a doctor's consideration.

Abstract: A mounting system includes a pressure vessel having a longitudinal axis, a retaining strap disposed around the pressure vessel, a carrier element having an aperture formed therein to receive the retaining strap therethrough to secure the carrier element to the pressure vessel, and a mounting element coupled to the carrier element and adapted to be coupled to a mounting point to secure the pressure vessel, wherein the longitudinal axis of the pressure vessel is disposed at an non-horizontal resting angle.

Abstract: An industrial process transmitter apparatus includes a housing chassis of a first metallic material and a housing skin of a second metallic material. The housing chassis includes a substantially cylindrical body portion, a first circumferentially extending support member located at or near a first end of the body portion of the housing chassis, and a second circumferentially extending support member located at or near a second end of the body portion of the housing chassis opposite the first end. The first circumferentially extending support member extends radially outward from the body portion, and the second circumferentially extending support member extends radially outward from the body portion. The housing skin is fitted over the housing chassis and is in physical contact with both the first and second circumferentially extending support members. The housing skin is spaced from the housing chassis in between the first and second circumferentially extending support members.

Abstract: A pressure sensor device (1) comprises: a pressure sensor (9) having a sensor body (9a) defined in which is a cavity (11) with a bottom surface (11a) belonging to a membrane portion (9?) of the body itself, a detection element operatively being associated to the membrane portion (9?), a connection structure (2) having a duct (2a, 15, 19) in communication with the abovementioned cavity (11), designed to receive a fluid a pressure of which is to be detected. The connection structure comprises a body (2) for supporting the pressure sensor (9), defining at least one respective passage (2a), and one compressible element (12) designed to be in contact with the fluid and configured to compensate possible volume variations thereof, the compressible element (12) being positioned at least partially within the cavity (11), in such a manner to substantially divide it into two opposite regions.

Abstract: Pressure sensor unit, in particular for a vehicle brake system, including a housing (2) in which at least one sensor element (1) is arranged which includes a deformation body (6) and at least one sensor means (7) arranged on the deformation body (6) for sensing a deformation of the deformation body (6), in which case at least the part of the housing (2) which is connected to the sensor element (1) and the part of the sensor element (1) which is connected to the housing (2) are fabricated from the same plastic material or from plastic materials having identical or almost identical temperature expansion coefficients, or in that at least part of the housing (2) and part of the sensor element (1) is designed as a one-piece injection molded part made of plastics.

Abstract: A pressure sensor device comprises a casing (2a, 3 a) defining a chamber (20) and an inlet passage (14a, 14b) of the chamber. Accommodated in the chamber (20) is a pressure sensor (17) having a sensor body with a cavity and a membrane capable of deformation under pressure action of a fluid present in the inlet passage (14a, 14b). The device further comprises a circuit arrangement (26, 27, 30) to which the pressure sensor (17) is electrically connected, the circuit arrangement including a circuit support at least partially accommodated in the chamber (20). The sensor body is not rigidly associated to the casing (2a, 3 a) and/or to other parts of the device (26, 27, 30, 35), i.e. it is mounted elastically or in a moveable manner with respect to the casing (2a, 3 a) and/or to said other parts (26, 27, 30, 35) inside the chamber (20).

Abstract: A mounting system includes a pressure vessel having a longitudinal axis, a retaining strap disposed around the pressure vessel, a carrier element having an aperture formed therein to receive the retaining strap therethrough to secure the carrier element to the pressure vessel, and a mounting element coupled to the carrier element and adapted to be coupled to a mounting point to secure the pressure vessel, wherein the longitudinal axis of the pressure vessel is disposed at an non-horizontal resting angle.

Abstract: A combined pressure and temperature sensor for recording the pressure and the temperature of a medium. The combined pressure and temperature sensor includes a sensor element in which at least one channel is developed for accommodating a temperature sensor and at least one channel is developed for recording a pressure. The at least one channel, for recording a pressure, opens out under a pressure sensor. The at least one channel for the temperature sensor runs centrically in the sensor element.

Abstract: A pressure sensor comprises a housing, a housing plug and a pressure port, which projects into the housing. The pressure sensor has a pressure-sensing element adhesively cemented on the pressure port, so that a passage, located in the pressure port, is sealed. To produce an adhesive film between the pressure port and the housing, the pressure port or the housing or both exhibit a recess in a region, which borders at least section by section on the adhesive film. The volume of recess is equal to the volume of the adhesive film. To produce the adhesive film, the intermediate space between the pressure port and the housing is filled with the adhesive, which was introduced into the recess, while utilizing a capillary effect.

Abstract: A pressure-sensor system having a sensor element and a hermetic housing for the sensor element has a particularly uncomplicated installation, in particular even under aggressive ambient conditions. The housing of this pressure-sensor system includes a first housing part having a housing bottom, and at least one additional housing part. The sensor element is installed on the housing bottom, and the pressure is supplied via an opening in the housing bottom. The at least one additional housing part is disposed above the sensor element and is connected to the first housing part. Apart from this, connecting pins for the electrical contacting of the sensor element are provided. The connecting pins are guided through the additional housing part.

Abstract: An ASIC compensated pressure sensor includes a sense die, an ASIC chip, and supporting elements. The sense die includes a metallized surface for attaching the sense die to a mounting surface. The resulting solder joint provides a hermetic seal that is resistant to a wide range of media associated with different environmental conditions. The mounting surface can contain the ASIC and electronics for compensation or can be attached to another mounting surface, which contains the ASIC and electronics. Either configuration can include collars of different styles for ease of assembly and in turn can be attached to a mating connector. The mounting surface can possess a closely matched coefficient of thermal expansion to the sense die in order to enhance electrical stability of the output signal over a wide temperature and pressure ranges.

Abstract: A pressure transmitter with pressure sensor mount includes pressure measurement circuitry. A metal body of the pressure transmitter has a pressure coupling configured to couple to a process pressure. A pressure sensor is configured to provide an output related to an applied pressure to the pressure measurement circuitry. A conduit is coupled to the pressure sensor and configured to apply an applied pressure corresponding to the process pressure to pressure sensor. A non-conductive spacer is configured to electrically isolate the conduit from the metal body. The non-conductive spacer has an opening formed therein and is arranged to convey the applied from the metal body to the conduit.

Abstract: A fast-fit device for fluidically connecting a pressure sensor to a water collecting tank of an electric household appliance including: a supporting body securable to a housing of the electric household appliance and carrying a first, blind tubular element, having a first open end, opposite to a second blind end; a second tubular element integrally obtained in one piece with a casing of the pressure sensor, which overhangingly extends therefrom for the entire length thereof and which displays external diameter and length smaller than the internal diameter and length of the first tubular element; a closing plug of the first end provided with a through hole which fluid-tightly receives in use the second tubular element; and first and second fastening means which are reciprocally complementary and integrally carried by the supporting body and the casing of the sensor, respectively.

Abstract: An apparatus and method of pressure sensing. The system can include a sensing apparatus connectable with a supply conduit and a mounting plate. The apparatus can include a coupling device for receiving the supply conduit, a housing having first and second openings in fluid communication with each other where the first opening receives at least a portion of the coupling device, and a sensing device having an insertion portion and a sensing area. The insertion portion can be received in the second opening of the housing. A first connection between the housing and the mounting plate can be remote from the sensing area, and a second connection between the housing and the sensing device can be remote from the sensing area.

Abstract: A semiconductor pressure sensor for a pressure sensor device has a pressure detection element which includes a membrane made of semiconductor material, particularly silicon. The sensor includes a support having a three-dimensional body passed through by a detection passage. The detection element is made integral with a first end face of the three-dimensional body, substantially at a respective end of the detection passage. The support is configured to serve the function of a mechanical and/or hydraulic adaptor or interface, with the aim of mounting the sensor into a pressure sensor device, particularly to allow mounting the pressure sensor into a pressure sensor device configured for mounting a sensor of the type referred to as monolithic or ceramic.

Abstract: A method and apparatus are described for fabricating an exposed backside pressure sensor (30) which protects interior electrical components (37) formed on a topside surface of a pressure sensor transducer die (31) from corrosive particles using a protective gel layer (38) and molding compound (39), but which vents a piezoresistive transducer sensor diaphragm (33) formed on a backside of the pressure sensor transducer die (31) through a vent hole (42) formed in an exposed die flag (36), enabling the sensor diaphragm (33) to directly sense pressure variations without the influence of a protective gel.

Abstract: A device for determining a physical value of a liquid flowing in a pipe, without contact with said liquid, said device comprising: a sensor (3) for said physical value; a connector (2) to insert into said pipe and comprising: an internal passage (13) extending between two apertures (11, 12), a flexible membrane (6) for a pressure sensor, forming a wall of said internal passage (13); and means (27, 62) for fastening said sensor (3) onto said connector (2); characterized in that said sensor is a temperature sensor (3) fastened to said connector (2) with the sensitive part of said sensor (3) turned towards said membrane (6).

Abstract: A method includes forming multiple trenches in a first wafer, forming a sensor structure on a first surface of a second wafer, and bonding the first wafer and the second wafer. The method also includes etching a second surface of the second wafer to form a sensor diaphragm in the second wafer. The method further includes removing a portion of the first wafer by cutting the first wafer in multiple areas of the first wafer associated with the trenches. A sensor includes a substrate and a surface acoustic wave (SAW) resonator on a first surface of the substrate. The sensor also includes a bonding pad electrically coupled to the SAW resonator and a notch formed in a second surface of the substrate. The sensor further includes a cover separated from the first surface of the substrate by a spacer. The SAW resonator is located between the cover and the substrate.

Abstract: A method of packaging for chip-on-board pressure sensor that includes a buffer layer with a coefficient of thermal expansion (CTE) intermediate between the transducer and a main chip-on-board substrate by which thermally induced package stresses can be greatly reduced or eliminated. Additionally, the use of a buffer layer with higher stiffness (elastic modulus) than the chip-on-board substrate further prevents or reduces flexural (bending) stresses from being transferred to the transducer. Such a buffer layer also enables a wider choice of materials for bonding and stable performance of pressure sensor in harsh media and environmental conditions. The pressure transducer can be adhesively bonded to a ceramic layer, which in turn can be adhesively bonded to an epoxy laminate chip-on-board substrate.

Abstract: Systems and methods for monitoring gas turbine engines are provided. In this regard, a representative method includes: monitoring lubrication oil at multiple locations of the gas turbine engine to detect a presence of debris in the oil; determining a characteristic of the debris in the oil; and correlating the characteristic of the debris with the location of detection to determine, while the gas turbine engine is operating, whether the engine is operating within predetermined limits.

Abstract: A system is disclosed for detecting an electrical sensor, the system includes a sensor signal processing circuit further comprising an input port to receive a connector including the output signal lines of the sensor, a resistor connected to the output signal line of said input port, wherein the resistor is connected to a predetermined voltage; a sensor circuit having a connector adapted to connect to the connector, wherein the sensor circuit has a resistance substantially less than the pull-resistor, and the sensor signal processing circuit detects an unconnected sensor based on the voltage applied by the resistor.

Abstract: A method is provided for producing a measuring transducer in order to transform at least one physical variable into at least one electric variable. A plurality of planar, insulating and conductive layers are respectively structured according to predefineable models which are adapted to each other and which are assembled in order to form a multi-layered arrangement.

Abstract: A pressure connection concept for pressure sensor modules is provided, using which the influence of assembly-related stresses in the sensor system on the sensor diaphragm and accordingly on the measuring signal detection is kept very low. The sensor system includes a sensor module for pressure detection and a connecting piece and at least one seal for coupling the sensor module to a measuring system. The sensor module includes at least one sensor element having a diaphragm and means for signal detection. Together with the means for signal detection, the sensor element is provided with packaging having a pressure connection opening and electrical contacts. A pressure channel is provided in the connecting piece, the pressure channel being coupled to the pressure connection opening of the sensor module using the seal. The packaging of the sensor module includes a tube-shaped projection which forms the pressure connection opening, and the pressure channel of the connecting piece terminates in a connecting tube.

Abstract: A pressure sensor includes a sensor which is arranged to couple to a process pressure. A quartz crystal is coupled to the sensor and is configured to measure pressure of fluid in the sensor body. An output from the quartz crystal is related to pressure applied to the sensor body by the process pressure.

Abstract: A pressure transducer, including a housing having a housing axis and a measuring cell chamber defined in the housing. The measuring cell chamber is exposable to a pressure via an opening. The opening is surrounded by an annular, first sealing surface. A pressure measuring cell having a second sealing surface facing towards the opening, and a support surface facing away from the sealing surface sealing ring; and a clamping apparatus, which engages the housing are provided. The pressure measuring cell and the sealing ring are clamped by means of an axial clamping force in such a manner between the clamping apparatus and the first sealing surface, that the sealing ring is arranged pressure-tightly between the first sealing surface and the second sealing surface. The pressure transducer further includes a misalignment accommodating arrangement, which includes a first transmission body, which faces toward the opening, and a second transmission body, which is facing away from the opening.

Abstract: A pressure measurement arrangement for measuring a line pressure of a product is described wherein product hold-up inside of disposable parts is minimized, comprising: a reusable pressure sensor comprising a measurement diaphragm, a fitting, the fitting comprising: a tubular opening extending through said fitting, for the reception of a disposable elastomeric tube, an aperture extending through an outside wall of the fitting into the tubular opening; and mounting structure, for mounting the pressure sensor on the aperture, such that the measurement diaphragm is exposed to an inside of the tubular opening; wherein the disposable tube is inserted in the tubular opening of the fitting during measurement; and an outside wall of the disposable tube comprises a thin flexible portion, which conforms to the measurement diaphragm when the disposable tube is pressurized by the line pressure.

Abstract: A pressure cavity is durable, stable, and biocompatible and configured in such a way that it constitutes pico to nanoliter-scale volume. The pressure cavity is hermetically sealed from the exterior environment while maintaining the ability to communicate with other devices. Micromachined, hermetically-sealed sensors are configured to receive power and return information through direct electrical contact with external electronics. The pressure cavity and sensor components disposed therein are hermetically sealed from the ambient in order to reduce drift and instability within the sensor. The sensor is designed for harsh and biological environments, e.g. intracorporeal implantation and in vivo use. Additionally, novel manufacturing methods are employed to construct the sensors.

Abstract: A pressure sensor module of the invention includes a pressure sensor and a laminar substrate. Electrodes are arranged in the vicinity of a diaphragm portion of the pressure sensor. In the laminar substrate, a plurality of substrates are laminated, and the laminar substrate incorporates the pressure sensor. One face of the diaphragm portion is exposed by a space portion. According to the invention, it is possible to provide a pressure sensor module which facilitates smaller and thinner sizes, and which enables high-density packaging.

Abstract: A pressure transmitter for measuring a pressure of a process fluid in an industrial process, includes a pressure sensor having an output related to an applied pressure. Measurement circuitry coupled to the pressure sensor is configured to provide a transmitter output related to sensed pressure. A pressure coupling face having an opening therein is arranged to transfer the applied pressure to the pressure sensor. A pressure coupling flange having a flange face abutting the pressure coupling face is configured to convey the process fluid to the opening of the pressure coupling face. Features are provided to control distribution of a leading force across the pressure coupling face and the flange face.

Abstract: A fluid cassette for a blood processing system includes a cassette housing and a rigid structure. The cassette housing defines the structure of the cassette and has a fluid path at least partially extending through it. The fluid path is configured to allow a fluid to pass through the housing. The rigid structure defines a cavity that is in fluid communication with the fluid path. The rigid structure also has an interface for interfacing and/or connecting with a pressure monitoring device. The interface allows the pressure monitoring device to measure the pressure within the fluid path. The cavity has a volume of air located between the fluid path and the interface.

Abstract: A method of welding an adapter fitting to a fitting on a measuring device system. The present disclosure also provides for a measuring device system having a first fitting that includes a stem, a second fitting that defines an opening sized to receive the first fitting, where the second fitting also defines an abutment face, wherein the second fitting is positioned around the first fitting with the abutment face abutting an outward end of the first fitting, and where at least one weld secures the first fitting to the second fitting.

Abstract: A pressure sensing device comprises a substrate having an opening, a pressure sensor die electrically connected to the substrate, and a pedestal having an upper surface that extends through the opening in the substrate, with the upper surface affixed to the sensor die. The pedestal has a pressure port that extends from the upper surface to a bottom surface of the pedestal, with the pressure port containing a hermetic sealing tube therein. A hermetic sealing cover is affixed to the substrate over the sensor die, with the cover and the substrate containing a reference pressure for the sensor die. A media isolation component has a chamber filled with a fluid that transmits a pressure applied to the media isolation component to the pressure sensor die. A capillary tube is affixed within the pressure port of the pedestal and is in communication with the sealing tube. The capillary tube and the sealing tube provide fluid communication between the chamber of the media isolation component and the sensor die.

Abstract: A pressure sensing device comprising a base element for fastening the pressure sensing device provided with a connecting duct for feeding a pressurized fluid. The pressure sensing device has a support member that extends along a plugging direction and is fitted with a plug-in connector section configured to be plugged into a complementary plug-in connector. The support member is connected to the base and is equipped with a pressure duct that is connected to the connecting duct, and encompasses a receiving hole which extends perpendicular to the plugging direction and communicates with the pressure duct. The pressure sensing device includes a pressure sensor element that is inserted into the receiving hole such that one of the surfaces of the pressure sensor element is exposed to pressure from the pressure duct, and is connected to contact elements for transmitting signals.

Abstract: There is disclosed a high pressure sensing header which is relatively insensitive to mounting torque. Essentially the header consists of an outer torque isolating shell which has a “C” shaped cross section with the cylindrical shell surrounding an inner “H” section header. The inner “H” section header has a thick diaphragm and is surrounded by the torque isolating shell which is secured to the “H” section header at a peripheral flange of the “H” section header. In this manner when the header is installed, the installation force is absorbed by the outer shell and there is no installation force or torque exhibited by the inner “H” section which will respond only to stress due to pressure. The torque isolating shell also contains a top surface which has a counterbore which can accommodate a crush ring, and when the unit is installed, the crush ring is forced or crushed against an installation wall to enable the inner header to receive pressure without experiencing any significant installation force.

Abstract: A pressure sensor unit consists of a shaft part adapted to be introduced in an opening through a pipe wall or chamber wall, and a flange part fastened on the outer end of the shaft part for providing sealing around the outer end of the opening. The shaft part inner end reaches in to engagement with a process fluid which pressure is to be measured. The inner end is provided with perforations for admitting process fluid into the inner room of the shaft part. In the inner room and straight behind the inner end it is arranged a block which constitute a base for a separating membrane for transferral of the process fluid pressure via a hydraulic pipe to a pressure sensor element in the flange part. The flange part is constructed as a thin walled pipe, which is enabled because of internal pressure equalisation. Thus great savings is achieved by production of the pressure sensor unit.

Abstract: A pressure gauge is composed of two separate components adapted to be assembled and disassembled by hand. The one component is a pressure-motion conversion element (3, 6) for receiving a pressure and effecting a movement of a movable portion (3c, 6c) thereof in response thereto, and the other component is a force measuring element (5) for measuring a force caused due to the movement of the movable portion (3c, 6c). The pressure-motion conversion element (3, 69) is constructed as a disposable component, whereas the force measuring element (5) is intended for re-use.

Abstract: An air pressure gauge has a housing, a circuit board, a pressure detector and a display. The housing is hollow and has a base, a cover, an engaging device, multiple protrusions and detents and a seal. The cover is pivotally connected to the base with a pivotal tab integrally formed between and connected to the base and the cover. The engaging device is mounted between the base and the cover and has an engaging recess and an engaging tab engaging each other. The protrusions and detents are mounted respectively on the base and the cover and engage each other. The seal is mounted between the base and the cover.

Abstract: A surface mounted instrument (20) that is easily installed to seal (110, 120) against a mounting surface (150) in spite of imprecise installation of a standard rough-in box (145) or irregularities in the surface. A cover plate (60) overlays the installed instrument housing (10) without the use of outwardly visible mechanical connectors by use of a pawl (65) that engages the housing. An oversized display (50) is mounted for easy replacement on a moveable display module (45) for unobstructed access to the interior (35) of the housing. Subsurface channels (90) formed in the housing are used to deliver a working fluid from a measured location to a sensor (85) inside the housing.

Abstract: A system for measuring pressure in a well borehole using two pressure sensing gauges that are exposed to an area of common pressure. Pressure measurements are made with preferably two pressure gauge assemblies each containing a single pressure sensing gauge. The two pressure gauge assemblies are removably disposed within a receptacle or “pocket” in the outer surface of a wall of a formation tester tool section. When disposed or “side loaded” in the pocket, the gauges within the pair of assemblies are axially aligned and positioned in a plane that is normal to the radius of the formation tester tool section. Both pressure sensing gauges can be connected to respond to the same fluid pressure originating from a probe or port section of a formation tester tool. By disposing the pressure gauge assemblies in a receptacle or “pocket” in the outer surface or wall of a formation tester tool section, the pressure sensing gauges are exposed to wellbore fluids. Pressure sensing gauges are selected to have low mass.