Abstract: A pressure sensor having a substrate, a counter-structure applied to the substrate, a dielectric on the counter-structure, a membrane on the dielectric, wherein the membrane or the counter-structure deflectable by a pressure applied, a protective structure, wherein the protective structure is isolated from the counter-structure or the membrane, wherein the protective structure is arranged with regard to the membrane or the counter-structure such that a capacity forms between the protective structure and the membrane or the protective structure and the counter-structure, and a provider for providing a potential at the protective structure differing from a potential at the counter-structure or the membrane.

Abstract: A micromechanical pressure sensor and a method for producing a micromechanical pressure sensor. This pressure sensor has at least one membrane and a measuring element situated on the membrane. A pressure applied at the membrane or a pressure differential applied at the different sides of the membrane results in deformation of the membrane. Simultaneous with the deformation of the membrane, the measuring element is subjected to elastic elongation and/or compression. In a piezo-sensitive component, such elastic elongation and/or compression generates a measured variable in the measuring element, which represents the applied pressure or the applied pressure differential at the membrane. It is provided in this context that the measuring element have at least partially a NiCr(Si) layer. Due to an at least partial crystallization in the production of the micromechanical pressure sensor, this NiCr(Si) layer has more advantageous piezoelectrical characteristics than an amorphous NiCr(Si) layer.

Abstract: A sensor, in particular a pressure sensor, having a housing 1; a housing interior 12 that contains a sensor element 9; electrical connecting elements 7 that are routed from the outside, through a housing part 2, and into the housing interior 19 and have connecting segments 17, which protrude into the housing interior on an inside 14 of the housing part 2 at respective entry points 15 and are electrically connected to the sensor element; and having a protective covering 21 that covers the connecting segments and the sensor element. To prevent air bubbles from getting into the protective covering, a sealing material 20 is applied onto the connecting segments 17, at least in the region of the entry point 15 of the respective connecting segments 17 into the housing interior 19 and the part 13 of the inside 14 of the housing part 2 encompassing the entry point 15, and the covering 21 is applied onto the sealing material 20 and the connecting segments 17.

Abstract: A capacitive sensor device for measuring properties of a medium to be measured when this medium surrounds and flows past the sensor. The sensor has a housing of metal, an opening in the housing transverse to the flow of said medium to be measured which is adapted to house at least one capacitive electrode, and where the electrode(s) of the sensor is/are electrically insulated from said medium to be measured by means of a glass ceramic material that is arranged to be flush with the outer surface of the sensor.

Abstract: A pressure sensor for detecting, e.g., an intake manifold pressure of an internal combustion engine is composed of a resin casing, a sensing member contained in the casing and conductor members embedded in the resin casing. The conductor members are disposed around the sensing member, and the sensing member is electrically connected to the conductor members by wire-bonding. Boundaries between the resin casing and the conductor members are sealed with an encapsulating member which is applied to the position at liquid state and dried thereafter. To prevent the liquid encapsulating member from flowing out of the applied position toward the sensing member, a bank is formed between the sensing member and the position where the encapsulating member is applied. A depressed portion for retaining the encapsulating member therein may be additionally formed next to the bank.

Abstract: A textured surface characterization system (100) includes a characterization apparatus (110) that contacts a textured surface (104) of an item (108) in order to characterize that surface. The characterization system includes a fluid delivery system (204) for flowing a fluid (128) across the textured surface when the textured surface is in contact with the characterization apparatus. Pressure measurement structures (144, 160) on the characterization apparatus provide pressure data for the fluid as it flows across the textured surface. This pressure data is used to characterize the textured surface.

Abstract: A pressure sensor includes a diaphragm for sealing liquid. The diaphragm includes a plurality of convexities, which are disposed concentrically on the diaphragm. Each convexity has a circular arc cross-section in a radial direction and has a ring shape. The sensor has a configuration factor. The configuration factor is in a range between 2.5 and 3.5. The diaphragm of the sensor has excellent deformability so that detection error of the sensor is reduced.

Abstract: A control box for use, for example, to open and close a bypass valve (18, 19) of a turbocharger, in which the closing movement occurs with higher force than the opening movement, wherein the closing movement occurs in the direction of a spring force and the opening movement in the direction against said spring force. The control box comprises two pressure chambers (4, 6) and both pressure chambers may be set to either atmospheric pressure or negative pressure.

Abstract: Apparatus for repeatedly indicating incremental pressure fluctuations and methods employing same are disclosed. A chamber may be sealed at an initial pressure and configured to respond to a pressure difference between the initial pressure and subsequent pressure within a container. The container may be filled via a valve mechanism exhibiting a first operational state that may allow for entry of material into the container while sealing the chamber at the initial pressure of the container as it began to be filled. A movable element communicating with the sealed chamber and the container may respond to a pressure differential therebetween, thus causing an indicator to indicate an incremental pressure fluctuation. The valve mechanism may exhibit a second operating state that may allow for the chamber and container pressures to be substantially equalized.

Abstract: A pressure transducer with a capillary tube filled with a fluid for high pressure measurements. The pressure transducer has a sensitive element formed with a bore defining a cylindrical sensitive chamber, and respective capillary tubes attached to either ends of the sensitive element in fluid communication with the sensitive chamber. Advantageously, each capillary tube has a respective end outside threaded to engage in a mating thread-way provided in the sensitive element; moreover, a perimeter weld is provided for safety around each capillary tube near the connection to the sensitive element.

Abstract: The invention relates to a pressure sensor (1) with a housing (2), a sensor device (4), a sensor fastening device (8, 8b) for fastening the sensor device (4) onto and/or in the front area of the housing (2), and a seal (7) for sealing the transitional area between the housing (2) and the sensor device (4), where the housing (2) exhibits an inside housing wall (2W) and the sensor device (4) exhibits an outside sensor device wall (4W), such that the housing wall (2W) and the sensor device wall (4W) run in adjacent fashion one to the other and exhibit between the housing wall (2W) and the sensor device (4W) a reception space (6) for receiving the seal (7).

Abstract: A pressure sensor for measuring a pressure includes a pressure chamber; and a deformation body, which can be exposed to a medium under pressure, and which, additionally, at least partially bounds the pressure chamber and seals such pressure-tightly from the medium; wherein the walls of the sensor chamber have a hydrophobic coating, which was applied by gas and/or vapor phase deposition. The hydrophobic coating preferably includes a silane. Especially suited are silanes having one or more hydrophobic groups R and one or more anchoring groups X. Especially preferred are: R—Si—X3, R1R2—Si—X2, R1R2R3—Si—X. The hydrophobic group R is preferably an alkyl, perfluoroalkyl, phenyl or perflurorophenyl group. The anchoring group X is preferably an —OH (silanol), —X (halide, e.g. —Cl), —OR (ester, e.g. —OCH3), —NH2 (amine), or —SH (Mercaptosilane). Additionally, aliphatic or cyclic silazanes —Si—NH—Si—, e.g. hexamethyldisilazane, can be used. Likewise suitable are compounds of the type Ry—Me—Xz, with Me=e.g. Zr, Ti.

Abstract: A pressure sensing unit has a pressure responsive member, a pressure sensor, and a hydraulic connector hydraulically connecting the pressure responsive member with the pressure sensor to produce an indication of sensed pressure. The hydraulic connector includes a tubular member and a longitudinal insert in the tubular member with hydraulic fluid in the tubular member between the insert and the member. The tubular member, the insert and the hydraulic fluid and the dimensions of the tubular member and the insert are such that the hydraulic fluid transmitted to the pressure sensor is substantially independent of temperature changes.

Abstract: An apparatus for sensing one or more physical characteristics of a fluid flowing in a fluid line, in one embodiment having an isolator block mounted onto a fluid line and in another embodiment, having an adapter plate coupled with isolator plate mounted onto a fluid line.

Abstract: A pressure transmitter apparatus includes a unitary body with two, normally vertical pressure passageways communicating respectively between opposed pressure openings extending normally horizontally through the body portion. A transducer for generating a differential pressure signal mounts on a transducer mounting element, coupled to the body portion and located above the pressure passageways. A pair of diaphragm elements can form first and second process diaphragms, closing first and second pressure openings. Flange elements overlie the diaphragm elements and are removably and replaceably secured to the body portion, having liquid drainage and gas purging passageways. A flame retardation element can be disposed within at least one of the pressure passageways. An overrange protection element can be integrally arranged with the unitary body portion to protect the transducer from overrange pressure fluctuations.

Abstract: A pressure module includes a sensor assembly with tubes extending from a pressure sensor to fluid isolator members. The pressure sensor is contained in a cavity in a module housing. The module housing includes support members joined by joints to the fluid isolator members to provide barriers to leakage of process fluids into the cavity. Threaded process inlets on a bottom outside surface of the module housing couple the process fluids to the fluid isolator members through process passageways in the module housing.

Abstract: A pressure activated valve for a three-way connection between a catheter, an injector and a pressure transducer is disclosed. The valve includes a body that has an inlet for connection to an injector, an outlet for connection to a catheter and a secondary connection for connection to a pressure transducer. The body also includes a seal seat disposed between the secondary connection in both the inlet and the outlet. The body is flexibly connected to a plug seal. The plug seal is disposed between the seal seat in both the inlet and the outlet. The plug seal is movable between an open position spaced apart from the seal seat and biased towards the inlet and the outlet and a closed position against the seal seat thereby isolating the secondary connection from both the inlet and the outlet.

Abstract: Techniques are disclosed for improving pressure sensor shock robustness in fluid containment devices by providing a mechanical filter configured to prevent high-frequency pressure shocks from damaging the pressure sensor. One approach includes a body of elastomeric material disposed on an external surface of the sensor. Another approach is a porous plug in a fluid pathway leading to the sensor. Yet another approach is to provide a seal structure with a labyrinth fluid path.

Abstract: A pressure sensor has a housing with an opening exposing a cavity, a barrier diaphragm across the opening, a pressure sensing element within the cavity, and a fill fluid within the cavity. The fill fluid comprises a fluid and a filler, the fluid has a TCE associated therewith, the housing has a TCE associated therewith, and the filler lowers the TCE of the fluid to a level matching the TCE of the housing. Accordingly, the housing and the fill fluid do not exhibit temperature induced dimensional changes relative to one another that cause plastic deformation of the barrier diaphragm.

Abstract: An absolute-pressure type of pressure sensor is provided. The sensor has a pressure detecting device having a metal diaphragm. Strain gauges are disposed on one surface of the diaphragm, whose other surface is formed to receive fluid to be detected. The sensor comprises a lid, relay board, two seal rings, and input/output terminal. The lid provides a reference pressure space. The relay board is electrically connected to the gauge and composed of laminated ceramic members having both of through holes formed to pass through both sides thereof and a protrusion formed outwardly. The two seal rings are located to face the two sides of the board, respectively. The one seal ring air-tightly connects the relay board and the diaphragm. The other seal ring air-tightly connects the relay board and the lid. The terminal is electrically connected to the relay board and mounted on the protrusion of the relay board.

Abstract: The aim of the invention in particular is to reduce the risk of haemolysis in extracorporeal blood circulation. To this end, a system element for releasably sealingly connecting a transducer to a fluid system comprises a measuring chamber (7) which can be connected to the fluid system in such a way as to allow throughflow. Said measuring chamber (7) is formed in a housing (10). Part of the wall of the measuring chamber (7) is formed by a membrane (11) which is considerably more flexible than the rest of the wall (15) of said measuring chamber (7). The membrane (11) has a peripheral built-up section (20) which is located on the side of the membrane (11) that faces towards the measuring chamber (7). Said built-up section (20) engages in a channel (19) which is formed in the housing (10) and which extends around the measuring chamber (7).

Abstract: A pressure sensor assembly includes an elongate pressure sensor mounted to a sensor mounting block. A protective element covers the elongate pressure sensor to prevent the pressure sensor from contacting process fluid.

Abstract: Apparatus for repeatedly indicating incremental pressure fluctuations and methods employing same are disclosed. A chamber may be sealed at an initial pressure and configured to respond to a pressure difference between the initial pressure and subsequent pressure within a container. The container may be filled via a valve mechanism exhibiting a first operational state that may allow for entry of material into the container while sealing the chamber at the initial pressure of the container as it began to be filled. A movable element communicating with the sealed chamber and the container may respond to a pressure differential therebetween, thus causing an indicator to indicate an incremental pressure fluctuation. The valve mechanism may exhibit a second operating state that may allow for the chamber and container pressures to be substantially equalized.

Abstract: A case of a pressure sensor has an atmospheric pressure introduction port for introducing atmospheric pressure into the case, and a water repellent filter that is attached to the atmospheric pressure introduction port to prevent passage of moisture, dust and the like while allowing flow of air. The filter is disposed to have a filter surface extending along a gravitational direction when the pressure sensor is used.

Abstract: Methods and apparatus for sensing a gauge pressure use a pressure gauge pressure sensor that includes a housing and a gauge pressure sensing element having a first pressure inlet and a second pressure inlet. The first pressure inlet is associated with a pressure to be measured and the second pressure inlet is associated with an atmospheric pressure. A flame arrestor disposed within the sensor housing fluidly couples the second pressure inlet to an internal portion of an explosion proof device.

Abstract: A pressure sensor is provided with a semiconductor device that is capable of detecting a pressure, a terminal that is connected to the semiconductor device by a bonding wire, a housing having an accommodation space for the semiconductor device, the bonding wire, and the terminal, a diaphragm for sealing the accommodation space, and working fluid that is sealed in the accommodation space and transmits a pressure applied to the diaphragm to the semiconductor device. The working fluid is silicone-based oil, and the terminal and the housing are sealed by fluorine-based adhesive.

Abstract: The invention relates to a pressure dome for connecting a transducer with a fluid system comprising an inlet channel and an outflow channel as well as a measuring chamber in which a fluid is able to circulate and which has a measuring membrane. To improve fluid circulation and simplify handling, the measuring chamber ceiling is configured in the shape of a calotte and the pressure dome is removably coupled to the transducer housing by means of a snap connection.

Abstract: An improved self-retaining pressure sensor assembly includes a pressure sensor having a housing, a depending ported stem terminated in an enlarged foot, and a flanged resilient seal disposed about the stem between the pressure sensor housing and foot, with the seal flange having one or more notches about its circumferential periphery to ease insertion and extraction of the assembly with respect to a circular opening formed in a pressure vessel. The notches reduce the effective area of the flange, proportionately decreasing the force (insertion force) needed to insert the assembly at the time of installation and the force (extraction force) needed to subsequently remove the assembly for repair or replacement. The number and size of the notches can be adjusted to provide acceptable insertion and extraction forces, without lubricant, while not significantly compromising the self-retention capability of the assembly.

Abstract: An improved low-cost pressure sensor assembly incorporates a stainless steel sensor element welded to an outboard face of a stainless steel insert captured in a low-cost metal pressure port adapted for attachment to a pneumatic valve. The pressure port includes outboard and inboard cavities separated by neck portion; the stainless steel insert is captured in the outboard cavity, while the inboard cavity is adapted for attachment to the pneumatic valve. The stainless steel insert includes a base portion that seats against an O-ring in a floor of the outboard cavity, and a stem portion within the O-ring that extends axially through the neck portion of the pressure port and into its inboard cavity. The insert has a first bore that extends axially from its outboard face into, but not through, the stem portion, and a second bore that intersects the first bore and opens into the inboard cavity of the pressure port.

Abstract: A pressure reading structure used in a pressure gauge is disclosed to include an index dial shaped like a circular cap and mounted in a hollow transparent cylindrical housing, and an angled pointer suspended over an angled top-view index dial portion and a side-view index dial portion of the index dial for enabling the user to view the readings of the pressure gauge from the top side as well as the peripheral side of the pressure gauge so as to enhance the convenience of using the gauge.

Abstract: A liquid measurement system including interface apparatus for sharing the excitation and signal processing of an ultrasonic transonic transducer and temperature measuring device remotely located at a liquid container is disclosed. The interface apparatus includes a common conduction path coupled to both of the ultrasonic transducer and the temperature device for conducting first excitation signals to the ultrasonic transducer and the corresponding echo signals therefrom, and for conducting second excitation signals to the temperature measuring device and the response signals therefrom, and an interface circuit for governing the conduction of the first and second excitation signals over the common conduction path from their generating sources and for providing a balanced interface for receiving both of the echo signals and response signals from the common conduction path.

Abstract: Described is a sensing device, which is suspended in a filling material, particularly a liquid, by means of a cable 30. The cable 30 consists of a cable jacket of insulating material, a shielding jacket 32 of metal mesh beneath the cable jacket 31, and the electrical conductors connected to the sensor proper 11. In accordance with the invention, the shielding jacket 32 also serves to relieve pull. To this end, the end 33 that projects into the sensor housing 10 is exposed, i.e., is free of the insulating jacket material, and has a solid mechanical connection to the adapting piece 21 of a cable seat 20 inserted into the housing 10, and the connection is electrically conductive.

Abstract: Methods and apparatus for sensing a gauge pressure use a pressure gauge pressure sensor that includes a housing and a gauge pressure sensing element having a first pressure inlet and a second pressure inlet. The first pressure inlet is associated with a pressure to be measured and the second pressure inlet is associated with an atmospheric pressure. A flame arrestor disposed within the sensor housing fluidly couples the second pressure inlet to an internal portion of an explosion proof device.

Abstract: A pressure sensing unit has a pressure responsive member, a pressure sensor, and a hydraulic connector hydraulically connecting the pressure responsive member with the pressure sensor to produce an indication of sensed pressure. The hydraulic connector includes a tubular member and a longitudinal insert in the tubular member with hydraulic fluid in the tubular member between the insert and the member. The tubular member, the insert and the hydraulic fluid and the dimensions of the tubular member and the insert are such that the hydraulic fluid transmitted to the pressure sensor is substantially independent of temperature changes.

Abstract: The aim of the invention in particular is to reduce the risk of haemolysis in extracorporeal blood circulation. To this end, a system element for releasably sealingly connecting a transducer to a fluid system comprises a measuring chamber (7) which can be connected to the fluid system in such a way as to allow throughflow. Said measuring chamber (7) is formed in a housing (10). Part of the wall of the measuring chamber (7) is formed by a membrane (11) which is considerably more flexible than the rest of the wall (15) of said measuring chamber (7). The membrane (11) has a peripheral built-up section (20) which is located on the side of the membrane (11) that faces towards the measuring chamber (7). Said built-up section (20) engages in a channel (19) which is formed in the housing (10) and which extends around the measuring chamber (7).

Abstract: The invention relates to a pressure transmitter for an overload-proof pressure gauge, comprising a base body, a separating membrane disposed on a pressure-sensitive side of the pressure transmitter and subjectable to a pressure to be measured, a communicating chamber located inside said base body, which receives a pressure transmission medium, said chamber being closed on the pressure-sensitive side by the separating membrane, wherein the coefficient of thermal expansion of the pressure transmission medium is established in such a way that a temperature-induced change in the volume of the communicating chamber equals a temperature-induced change in the volume of the pressure transmission medium.

Abstract: An apparatus and method for pressure sensing includes a Bourdon tube connected to a source of fluid pressure for sensing pressure changes therein, the Bourdon tube containing a pressure sensitive medium, a socket having a bore therethrough and positioned to fluidly connect the Bourdon tube with the source of pressure, a diaphragm positioned in the bore between the Bourdon tube and the source of pressure so as to isolate the pressure sensitive medium from the fluid whose pressure is sensed, and a dampener positioned between the diaphragm and the Bourdon tube, the dampener having a porous metallic body effective for substantially dampening transmission of a pressure pulse from the source of pressure to the pressure sensitive medium.

Abstract: A pressure-measuring cell having a base and a diaphragm positioned on the base is deformed by a pressure being measured. A temperature-measuring sensor is positioned between the diaphragm and the base preferably embedded in a material layer that seals a compartment. The diaphragm is preferably made of a ceramic and the material layer is preferably made of a glass.

Abstract: In a pressure sensor, a sensor element is mounted on a side of a first surface of a first case, and a second case having a cylindrical hollow portion is bonded to the first case to cover a part of a second surface of the first case, opposite to the first surface. Terminals are embedded in the first case to protrude from the second surface, and branch portions are branched from the terminals from an embedded portion in the first case to have exposed portions exposed to the second surface. A chip capacitor is mounted on the exposed portions on the second surface to be electrically connected to the exposed portions. In the pressure sensor, a diameter (D1) of the second surface of the first case is larger than an inner diameter (D2) of the hollow portion at a position where protrusion top ends of the terminals are positioned.

Abstract: A pressure sensor element for mounting in a connecting element comprises an isolator body with a laterally projecting membrane. The laterally projecting membrane covering an opening of a passage through which the pressure present at the surface of the membrane is conveyed to a pressure transducer element by means of a hydraulic fluid. In order to mount the pressure sensor element, it is secured in a mounting aperture of the connecting element. The projecting perimeter of the membrane is secured to the surface surrounding the mounting aperture of the connecting element by means of a continuous seam. A membrane type ring in combination with a conventional membrane may be substituted for the projecting membrane, wherein the membrane type ring covers the gap between the pressure sensor element and the adapter element.

Abstract: A pressure detecting apparatus includes: a housing (11) for forming fluid chambers (21A and 21B) into which external fluid pressures are imported respectively; a pressure-receiving member (31) slidably provided in the housing (11) for receiving the fluid pressures from the fluid chambers (21A and 21B); an elastic member (35) supported by the housing (11) and elastically deformed due to a slide displacement of the pressure-receiving member (31) from a predetermined position; a displacement detecting means (12) for detecting the displacement of the pressure-receiving member (31) from the predetermined position; the elastic member including a base portion supported by the housing, an engagement portion engaged with the pressure-receiving member, and a flexible arm extending from the base portion toward the engagement portion along a plane approximately perpendicular to a direction of sliding of the pressure-receiving member.

Abstract: A pressure sensor according to the present invention comprises a pressure measuring portion which is composed of a resin and contacts fluid, and a sensor element which measures pressure imposed on the pressure measuring portion. Furthermore, a conductive layer having electrical conductivity is provided between the pressure measuring portion and the sensor element, and the conductive layer is connected to a ground. According to this pressure sensor, static electricity accumulated in the pressure measuring portion is released to a ground through the conductive layer without being transmitted to the sensor element.

Abstract: A pressure sensor is provided, in which dead space is not formed under the diaphragm so that air or fluid will not be remained in the dead space. The pressure sensor having a passage for flowing fluid from one end to the other end thereof comprises a sensor head having a pressure sensitive area responsive to the fluid pressure and a diaphragm having a pressure receiving surface for receiving the fluid pressure directly, wherein the pressure receiving surface is disposed so as to protrude to the inside of the passage, and the pressure sensitive area is disposed on the opposite surface from the pressure receiving surface of the diaphragm.

Abstract: A pressure sensor device having high reliability and excellent workability, which can be used for both types of sensor elements which receive pressure on the front side and the rear side, can be reduced in size, whose characteristic properties can be confirmed before a sensor module is set in the case, and which eliminates the need for changing the internal structure of the case when the external shape of the case or the shape of a connector is altered. A wall portion projecting to surround a sensor element is formed on the surface of a sensor module, a groove potion is formed in an upper case or a lower case at a position corresponding to the wall portion, and an end of the wall portion is mated with this groove portion through an adhesive to form a closed space for storing the sensor element.

Abstract: The present invention pertains to a pressure-measurement device with a pressure sensor (1) for measuring the pressure of liquid or gaseous media and with a diaphragm seal (2) that subjects measuring diaphragm (11) of pressure sensor (1) to a pressure to be measured. Pressure sensor (1) has a connection part (12) made of a ceramic material which is connected to measuring diaphragm (11) on the diaphragm side via a joint (14) that is diffusion-tight towards the exterior, and is connected diffusion-tightly to diaphragm seal (2) on the diaphragm seal side. In this way, it is assured that no gases or water vapor can enter the pressure-transfer medium via pressure sensor (1). The operational mode of the pressure transducer remains functional over a long time, and particularly at high temperatures.

Abstract: A pressure mediator includes a base body 20; a divider diaphragm system having a first divider diaphragm 31 and a second divider diaphragm 21, between which an intermediate chamber is enclosed in pressuretight fashion, in which the first surface of the first divider diaphragm 321, remote from the intermediate chamber, can be acted upon by the pressure prevailing in the first medium, and the first surface of the second divider diaphragm 21, remote from the intermediate chamber, is oriented toward the base body and is secured by its peripheral region to the base body, forming a pressure chamber between the base body and the second divider diaphragm 31, and the pressure chamber can be filled with the second medium and has a pressure chamber opening, through which the pressure can be transmitted by means of the second medium, and an exertion of pressure of the first divider diaphragm can also be transmitted to the second divider diaphragm via the intermediate volume; and having a sensor 4, for monitoring a proper

Abstract: A pressure sensor is mounted upon a hydraulic valve body. The sensor has a base which extends into a bore formed in the valve body. The valve body bore is in communication with a pressurized hydraulic fluid. A cover that is removably attached to the valve body encloses the pressure sensor. A circuit substrate is disposed within the cover and electrically connected to the pressure sensor.

Abstract: Methods and systems for measuring the pressure of a fluid. A flexible barrier separates the fluid from the pressure receiving surface of a pressure sensing device. The pressure of the fluid is transferred through the flexible barrier to the pressure receiving surface. The flexible barrier may be in abutting juxtaposition with or may be spaced apart from the pressure sensing surface. In either case, the flexible barrier is coupled or held in defined relationship to the pressure sensing surface such that the pressure receiving surface will receive the substantially actual pressure of the fluid even when the pressure of the fluid is less than the ambient atmospheric pressure. Coupling of the flexible barrier to the pressure receiving surface may be achieved by any suitable means, including adhesive or the application of a full or partial vacuum between the flexible barrier and the pressure receiving surface.

Abstract: A non-contaminating pressure transducer module having an isolation member is disclosed. The isolation member isolates a pressure sensor within the transducer module from exposure to fluids flowing through a conduit in the module. The transducer module may be positioned in-line within a fluid flow circuit carrying corrosive materials, wherein the pressure transducer module produces a control signal proportional to either a gauge pressure or an absolute pressure of the fluid flow circuit. The pressure transducer module of the present invention also avoids the introduction of particulate, unwanted ions, or vapors into the flow circuit.

Abstract: A non-contaminating pressure transducer module having an isolation member is disclosed. The isolation member isolates a pressure sensor within the transducer module from exposure to ultra high purity fluids flowing through a conduit in the module without significantly affecting the accuracy of the pressure measurement. The transducer module may be positioned within a fluid flow circuit carrying corrosive materials, wherein the pressure transducer module produces a control signal proportional to either a gauge pressure or an absolute pressure of the fluid flow circuit. The pressure transducer module of the present invention also avoids the introduction of particulate, unwanted ions, or vapors into the flow circuit.