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7624642 |
Differential pressure sensor isolation in a process fluid pressure transmitter
A differential pressure transmitter includes first and second process fluid inlets. A differential pressure sensor is disposed within the transmitter and has first and second sensor inlets. A first...
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7516667 |
Differential pressure sensor having symmetrically-provided sensor chips and pressure introduction passages
A differential pressure sensor includes a case, a first and a second pressure sensing element, a first and a second pressure introduction passage, and a differential pressure determining element....
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7513163 |
Pressure sensor and device for measuring pressure
A pressure sensor and a pressure measuring device are provided applicable to a variety of pressure detection targets and capable of measuring a surface pressure. The pressure sensor is configured...
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7495302 |
Micromechanical component having a diaphragm
A micromechanical component having a diaphragm is provided, the structure of which effectively prevents the penetration of dirt particles into the cavity. A method for manufacturing such a...
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7454975 |
Expansion chamber for use with a pressure transmitter
A pressure monitoring system provides a pressure sensor and a body that has a first coefficient of thermal expansion and includes at least one opening for accessing a process fluid. At least one...
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7409866 |
Signal transmission system
A single wire interface for a transducer transmits the transducer output as a frequency modulated signal over one single wire during one interval. During a second interval a reference signal is...
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7404330 |
Pressure sensor
A pressure sensor includes a metal housing and a semiconductor chip. The housing has a diaphragm unitary with the housing and an inlet for introducing fluid to the diaphragm. The inlet has a first...
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7352287 |
Pneumatic controller
A pneumatic controller for controlling a device.
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7343810 |
Pressure sensor and manufacturing method therefor
A pressure sensor is composed of a pressure housing having a pressure chamber inside and a pressure sensitive element arranged in the pressure chamber, and a joint housing having a fluid passage...
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7325460 |
Force sensor method and construction
A method of making a force sensor, the force sensor being particularly sensitive the axial component of a force applied along a predetermined axis, of the type including a force-receiving membrane...
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7278317 |
Pressure measurement
Pressure measurement may be achieved by using a pressure-conveyance media that responds to externally applied pressure to convey pressure to a pressure sensor. With the conveyance of pressure, the...
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7275444 |
Pressure transducer apparatus adapted to measure engine pressure parameters
A pressure header assembly has a closed front and back surface. The back surface has an aperture for accommodating a separate dual die pressure header. The dual die pressure header has an absolute...
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7258020 |
Pressure sensor with conductive ceramic membrane
A pressure sensor for sensing a fluid pressure in harsh environments such as the air pressure in a tire formed on a wafer substrate. Associated circuitry deposited in CMOS layers on the wafer...
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7216546 |
Pressure sensor having integrated temperature sensor
A pressure sensor includes a case, terminals, a pressure sensing element, a port, and a temperature sensing element. The terminals are assembled to the case by insert molding and connectable to an...
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7213463 |
Pressure sensor having liquid in a pressure sensing chamber
A pressure sensor includes a sensor chip, a pressure receiving diaphragm, a connector case, and a case. A pressure sensing chamber is provide in the connector case and filled with oil. The sensor...
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7213464 |
System for visually monitoring pressure in an enclosed space
A compliant balloon having an outer reflective surface which is positioned next to a transparent window which has an opaque element thereon, the reflection of the opaque element from the outer...
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7176811 |
Pressure altimeter electrical testing
A test apparatus and method of electrical testing especially useful for verifying normal performance of essential functions in an aircraft atmospheric pressure responsive auxiliary altimeter under...
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7131335 |
Pressure sensor with barrier providing impending sensor failure indication
A pressure transmitter for transfer of a pressure prevailing in a first medium onto a second medium, including a pressure chamber 4 in a platform 1 , which chamber is separated from the first...
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7117746 |
Digital pressure gauge
A digital pressure gauge comprises a power supply, an input button unit, a pressure sensor, a display unit, a warning unit, and a control unit. The control unit counts the number of operations...
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7093494 |
Micro-electromechanical pressure sensor
A pressure sensor ( 30 ) for harsh environments such as vehicle tires, the sensor having a chamber ( 58 ) partially defined by a flexible membrane ( 50 ), the chamber ( 58 ) containing a fluid at a...
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7043993 |
Pressure sensor device having temperature sensor
A pressure sensor device having a temperature sensor includes a pressure sensor, a temperature sensor, a sensor casing for accommodating the pressure sensor and a connector pin for electrically...
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7043995 |
Pressure sensor with membrane and measuring elements arranged on the membrane
A pressure sensor includes a membrane having a radially peripheral edge region fixedly arranged on a support. One side of the membrane can be acted on by a medium being measured and the membrane...
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7032454 |
Piezoelectric cantilever pressure sensor array
A piezoelectric cantilever pressure sensor array is disclosed. The piezoelectric cantilever pressure sensor array contains a substrate, a readout circuit, and piezoelectric cantilever pressure...
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7013735 |
Pressure sensor
A differential pressure sensor chip ( 4 ) comprises a diaphragm for measuring a differential pressure and converts a pressure received by the diaphragm for measuring the differential pressure into...
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6964198 |
Sensor testing system and method
In general, a pressure rail can be provide, which includes one or more pressure inlets and a plurality of pressured cavities formed therein. Housing components can be respectively located atop the...
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6915698 |
Pressure sensor, and its manufacturing method
A small-sized pressure sensor having smaller numbers of parts and assembling steps, a simple structure, a high assembly precision, and little dispersion in the operation characteristics, and a...
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6892582 |
Semiconductor pressure sensor and pressure sensing device
The object of the present invention is to propose an etch channel sealing structure characterized by excellent impermeability to moisture and resistance to temporal change of the diaphragm in the...
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6883378 |
Low TCE fill fluid for barrier diaphragm pressure sensors
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...
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6880405 |
Electrical/visual differential pressure indicator with solid state sensor
A differential pressure indicator has a housing with at least two ports in the housing. One port receives a first pressure, and the second port receives a second pressure. A pressure resistive...
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6860153 |
Gas pressure sensor based on short-distance heat conduction and method for fabricating same
A thermal pressure sensor monitors pressure by measuring effects caused by variations of thermal conductivity between a member and a substrate to which the member is adhered by stiction. The...
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6845674 |
Transfer fluid for pressure measurement technology and its application
Transfer fluid, in particular for electrical pressure transducers and pressure transmitters, that transfers deflections of a separating element between a substance to be measured and the transfer...
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6840111 |
Micromechanical component and pressure sensor having a component of this type
A micromechanical component in which lateral deformations, i.e., deformations of the component parallel to its two main surfaces, are concentrated in a defined area of the component structure,...
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6823739 |
Thin pressure sensor and biological information measuring device using same, and biological information measuring method
A thin pressure sensor includes: a pair of external electrodes, which are respectively made of conductive thin films that are respectively provided with piezoelectric layers on inner sides; and a...
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6769308 |
Low-cost stainless steel pressure sensor assembly for a pneumatic valve
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...
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6763724 |
Hermetic pressure transducer
A port fitting is formed with a closed, pedestal end forming a diaphragm on which a strain gauge sensor is mounted. A support member is received on the pedestal end and is formed with a flat end...
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6752021 |
Relative pressure measuring instrument
A relative pressure measuring instrument has a reference pressure feed that offers a high measure of safety and is easy to produce. Included is a relative pressure measuring cell having a pressure...
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6742395 |
Hermetic pressure transducer
A port fitting ( 102 ) is formed with a closed, pedestal end forming a diaphragm ( 102 a ) on which a strain gauge sensor is mounted. A support member ( 106 ) is received on the pedestal end and is...
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6688181 |
Membrane pressure sensor comprising silicon carbide and method for making same
The invention concerns a pressure sensor ( 1 ), able to operate at high temperature and measure the pressure of a hostile medium, comprising: a sensing element ( 4 ) integrating a membrane ( 8 )...
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6684712 |
Measuring instrument for a pressure gauge
The measuring instrument for a pressure gauge comprises an indicator unit with two plates that bear rotatably an indicator shaft carrying a pinion and that furthermore bear a gear segment. The...
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6651505 |
Pressure detecting apparatus
A pressure detecting apparatus includes: a housing ( 11 ) for forming fluid chambers ( 21 A and 21 B) into which external fluid pressures are imported respectively; a pressure-receiving member (...
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6649046 |
Device for measuring negative pressures in an extracorporeal blood circuit
A device for measuring the pressure of blood in a pipe ( 44 ) of an extracoporeal blood cicuit, includes a pressure measurement section ( 46 ) having a compartment ( 58 ) which is delimited...
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6615668 |
Semiconductor pressure sensor having signal processor circuit
A diaphragm that distorts according to pressure applied thereon and a signal processor circuit are formed on a semiconductor substrate having an (110)-surface-orientation. Stain gauges converting...
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6615664 |
Method of measuring pressure by means of a pressure gauge having a resonant element
The invention relates to a method of measuring pressure in which an evacuated capsule ( 1 ) containing a resonant element ( 5 ) is placed in the fluid whose pressure is to be measured, a vibration...
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6609427 |
Gas fill system in a pressure transmitter
A pressure transmitter with a hermetically sealed housing surrounding a cavity that is filled with a gas that is free of integrated circuit contaminants. A sensor circuit including an integrated...
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6581468 |
Independent-excitation cross-coupled differential-pressure transducer
The present invention provides a differential-pressure transducer having two sensors cross-coupled and independently excited. A first Wheatstone Bridge pressure sensor has a first sensitivity and...
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6578426 |
Pressure sensor having semiconductor sensor chip
A semiconductor sensor chip mounted on a thin diaphragm of a cylindrical metallic stem via an insulation layer is hermetically contained in a housing of a pressure sensor. The sensor chip includes...
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6497152 |
Method for eliminating output discontinuities in digital pressure transducers and digital pressure transducer employing same
Digital pressure transducers employing force-sensitive resonators are designed according to a method that eliminates spurious mode resonances. The dimensional and geometrical relationships of the...
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6159384 |
Methods and apparatus for monitoring a filter bed by differential pressure
A differential pressure monitor measures the pressure at a plurality of heights in a filter bed. A preferred embodiment of the monitor comprises an elongated body, a plurality of pressure sensors...
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6089097 |
Elongated pressure sensor for a pressure transmitter
A transmitter in a process control system transmits a pressure over a process control loop. The transmitter includes I/O circuitry, compensation circuitry and an absolute pressure sensor. The I/O...
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5959213 |
Semiconductor differential pressure measuring device
A semiconductor differential pressure measuring device comprising two measurement diaphragms and two detection sensors provided in a semiconductor substrate using micromachining techniques, and a...
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