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WO/1993/024818 |
A two-wire transmitter includes a pressure sensor (5; 160) comprising first (11; R¿9?, R¿10?) and second (13; R¿11?, R¿12?) sensing means each having an impedance value which varies with pressure being measured and with a predetermin...
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WO/1993/022643 |
A method and apparatus for measuring differences between forces, pressures, and combinations thereof. One or more force or pressure deformable members, preferably metal bellows, are internally connected by rigid linkage which is in turn ...
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WO/1993/021506 |
A transmitter (8) with a flame arresting header (16) senses a pressure of a process fluid with a diaphragm (44) which is sealed to the header. The diaphragm (44) transfers the pressure of the process fluid acting on an outer surface of t...
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WO/1993/017313 |
The invention relates to a pressure difference sensor with a semiconductor measuring diaphragm which is clamped between two bearers of insulating material to form an inner chamber; each of the bearers is fitted with a flat electrode on t...
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WO/1993/008479 |
A two wire transmitter (12) responsive to a pressure differential sensor (30) includes a fixed module (28) and a removable module (26). The fixed module (28) is adapted for connection to an analog removable module (26) having a compensat...
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WO/1992/017757 |
A pressure sensing transmitter (10) is provided that has high overpressure protection. The transmitter (10) includes a housing (12) having a first cell(14), a second cell (16), a sensing chamber (18), first and second pressure signal rec...
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WO/1992/017756 |
A metal thin film (58) bonds a semiconductor bonding region (54, 56) of a diaphragm layer (50) to a ceramic bonding region (44) of a high modulus support block (40). The arrangement isolates a pressure sensing diaphragm (60) from undesir...
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WO/1992/015850 |
In a two wire transmitter (10), a capacitive sensor (5) senses differential pressure and provides a differential pressure signal based on the differential pressure sensed. The differential pressure signal varies with variations in static...
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WO/1992/010731 |
A pressure transmitter (10) has a pressure transducer (12) in a transmitter housing (14). The transmitter housing (14) includes a groove or a notch (20) defining a flexure closely proximate a housing outer rim (24). The outer rim (24) re...
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WO/1991/015743 |
An industrial machine such as a civil engineering machine and a construction machine, comprising a hydraulic system in a driving system thereof, wherein conditions of pressure in respective portions of the hydraulic system are detected a...
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WO/1991/005232 |
A capactive ratioing oscillator circuit utilizing a prior art pressure capsule, but through modification of the stable variable oscillator circuit achieves a digital output which varies with the square root of the capacitance ratio C35 C...
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WO/1991/000415 |
An apparatus is disclosed for the accurate measurement of pressure changes. That apparatus has a reference accumulator (10) and a differential pressure transducer (50). The reference accumulator (10) stores a pressure representative of t...
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WO/1990/011503 |
This invention relates to a differential pressure gauge utilized for measuring the difference between fluid pressures at two positions spaced apart from each other in a longitudinal direction of a fluid conduit line in the internal space...
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WO/1990/004701 |
A solid state pressure sensor (35) utilizes a brittle diaphragm (36) made of a material such as silicon, which is mounted between base plates of glass (37, 38), and which deflects in response to pressure. The base plates (37, 38) of glas...
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WO/1989/006350 |
The present invention concerns a differential pressure meter for measuring differential pressure between two different points. As taught by the invention, the meter comprises two vertical, substantially transparent tubes (1, 2), said tub...
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WO/1988/007185 |
An isolator apparatus (12) for coupling pressure from a pressurized fluid carried in a conduit (40) to a pressure sensor (10A) in a pressure transmitter (10) having an isolation diaphragm (24), isolation fluid (54), and a pressure sealin...
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WO/1988/002107 |
A pressure transmitter (10) is coupled directly to an industry standard flange adapter union (40) having a standard bolt hole spacing. Small diameter isolator diaphragms (30, 31) are positioned on the transmitter case (11) at locations s...
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WO/1988/001049 |
A deflecting diaphragm differential pressure sensor (10) is formed so all electrical elements (30A-30D) and connections (34B) from external circuitry to the sensor (10) are isolated from the pressure media. The deflecting, pressure sensi...
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WO/1988/000335 |
A cell for sensing differential pressures has a single brittle material diaphragm (63, 93, 102) mounted on support plates (50, 75, 120, 130) positioned on opposite sides of the diaphragm (63, 93, 102). The diaphragm surfaces (43C, 77C, 1...
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WO/1987/003088 |
A corrosion proof differential pressure transducer includes a central disk (12) and two thin diaphragms (14, 16) mounted close to but spaced from the disk on both sides thereof, with the diaphragms being intercoupled to move together. Th...
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WO/1986/002447 |
A pressure sensing cell construction (10) comprises a pair of plates (42, 43) which are joined together around the periphery, to form a first chamber (45). A second chamber (52), preferably identically constructed to the first chamber (4...
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WO/1985/004474 |
A differential pressure sensor (10) senses a difference in pressure between a first input (low) pressure (12) or "reference pressure" and a second input (high) pressure (14) and provides a differential sensor signal representative of the...
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WO/1985/002676 |
A transducer (10) for sensing pressure has a first (60) and a second (62) pressure chamber for sensing pressure and a center stop (20) which has two substantially flat faces (52, 54), each face cooperating with an associated sensor diaph...
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WO/1985/002677 |
A transducer (10) has a first (22) and second (24) sensing diaphragm configured such that a first pressure (P1) is applied to the first diaphragm (22) and a second pressure (P2) is applied to the second diaphragm (24) and wherein both di...
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WO/1984/000532 |
An automatic pressure sensitive regulation assembly and process for use with a non-mechanical particulate solids flow apparatus (2). The automatic pressure sensitive regulation assembly comprises first and second pressurized fluid distri...
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WO/1983/004308 |
A pressure transducer for measuring the difference in pressures between two liquids, includes two very closely spaced plates (12 and 14), at least one of which (14) is a diaphragm, and opposed conductive coatings (18 and 20) on these two...
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WO/1983/004286 |
The method is applied to a turbomachine, particularly to a pump, and to a support for a pressure sensor of a gaseous or liquid fluid, particularly an electronic pressure pick-off. The pressure or differential pressure of the fluid (3) co...
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WO/1983/002004 |
Improved apparatus (16, 17) for conveying fluid pressures to a differential pressure transducer (14). The apparatus (16, 17) comprises a single flange (16) connected to and fluidly coupled to the differential pressure transducer for conv...
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WO/1982/004125 |
Capacitive pressure transducer in which a sensing diaphragm (40) bearing an electrode (56) is mounted to flex in response to applied fluid pressure relative to a reference member (42) having an opposed electrode (64). A thin film or laye...
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WO/1982/002093 |
In a method for measuring the partial pressure of a gas in a medium that is not critical as to the selection of such medium, a load quantity is supplied to a material having a selectivity with respect to ions. The potential difference be...
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WO/1982/001250 |
A capacitance transducer has a central chamber (53, 55) with a conductive diaphragm (36) disposed therein to separate the chamber into at least two portions (53 and 55), at least one portion having an electrical conductor (61, 63) dispos...
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WO/1982/001041 |
The electropneumatic converter comprises a control part (10) responsive to a pressure difference, connectable to conduits (4, 5) of a pneumatic circuit and having a device with capillary tubes (12, 13) arranged in a casing (35) and parti...
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WO/1980/001318 |
The device (10) includes a housing (12) defining a primary chamber (26). The primary chamber (26) has a first end (28), a second end (30) and an axis (32) extending between the two ends. A movable member (34, 62) is supported in the prim...
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JP2013019732 |
To optionally set a set value of excessive pressure that a diaphragm of a differential pressure/pressure transmitter reacts to.A differential pressure/pressure transmitter including a main body 1 having a high pressure-side pressure rece...
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JP2013003097 |
To provide a pressure sensor having stable characteristics, and capable of saving cost.A pressure sensor in which a strain sensor is formed on a measurement diaphragm, includes a semiconductor strain gauge formed on one surface of a firs...
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JP2013003098 |
To materialize a pressure sensor having high reliability to abrupt pressure fluctuation such as water impact, stabilizing temperature characteristics, and capable of saving a cost.A pressure sensor formed with a strain sensor on a measur...
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JP2012252002 |
To provide a dual port pressure sensor.A dual port pressure sensor includes a lead frame having a flag, a lead, and a finger. First and second openings are extended via the flag. A sealing member is arranged around a portion of the flag,...
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JP2012242351 |
To provide a differential pressure and pressure measuring device whose withstand pressure is improved.In a semiconductor pressure measuring device including a mold package having one plane connected to one plane of a semiconductor pressu...
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JP2012242328 |
To provide a high resolution water pressure measuring device suitable to measure the penetration depth of a probe for a cone penetration test to underwater ground of a large water depth region with high accuracy, a depth measuring device...
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JP2012225787 |
To provide a differential pressure measuring unit in which the quantity of liquids in a liquid tank divided into a plurality of accommodation chambers can be estimated by a single unit, and a liquid quantity estimation system including t...
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JP2012198153 |
To provide a rotation structure of a detector and a converter, which can easily rotate the converter against the detector.The rotation structure of the detector and the converter includes: the detector composed of a large-diameter part a...
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JP2012189349 |
To provide a flow velocity sensor especially in which one of a plurality of pressure-sensitive elements is not affected by change in pressure of the other pressure-sensitive element.A flow velocity sensor 10 of the present invention comp...
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JP2012181062 |
To keep accuracy in pressure measurement by discharging residual air in a circumference, while protecting a seal diaphragm.A force detector housing case 10 for housing a pressure sensor 210 includes: a cylindrical container; a flange par...
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JP2012163499 |
To determine and recover a failure in a differential pressure sensor including independent two pressure sensors.A differential pressure sensor includes first and second pressure sensors disposed at first and second measuring points of a ...
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JP2012127710 |
To provide a differential pressure measurement method and a device for the same by which the work efficiency of leakage inspection is enhanced and the degree of precision of the leakage inspection is improved.A differential pressure meas...
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JP2012118034 |
To provide a failure determination method and a failure determination device for a differential pressure sensor, capable of failure determination in the differential pressure sensor having two independent pressure sensors.The failure det...
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JP2012112983 |
To provide a differential pressure detection device capable of accurately detecting a fine differential pressure regardless of an initial pressure of a detection object.The differential pressure detection device comprises: a high pressur...
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JP2012107891 |
To provide a differential pressure transmitter with which zero-point adjustment can be performed with good work efficiency.A differential pressure transmitter which is constructed such that the zero-point adjustment of a variable which i...
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JP2012002688 |
To reduce the number of parts and costs.A dual physical quantity sensor includes: a pressure sensor 3A for detecting the pressure of a first object to be measured; a pressure sensor 3B for detecting the pressure of a second object to be ...
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JP2012002728 |
To reduce an influence of a difference in detection output characteristics between two detection elements in a measurement range and to improve accuracy in obtaining a difference in detection output of each detection element.Each of func...
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