Abstract: An apparatus for recovery of solids from a vapor, the apparatus including: a vessel comprising a cylindrical portion on top of an angled portion; a vapor inlet located in the cylindrical portion for introducing a solid-vapor mixture tangentially to the cylindrical portion; at least one inlet nozzle disposed in a top of the vessel for spraying a hydrocarbon fluid into the vessel; an indirect heat exchange device disposed concentrically within the cylindrical portion, thereby providing an annulus for vapor and hydrocarbon flow; a heat exchange device disposed at an exterior of the angled portion; an outlet located at a bottom of the angled portion to recover the vapor having a reduced solids content and a solid-hydrocarbon mixture. Also disclosed are processes to clean an oil vapor using such an apparatus.

Abstract: A shipboard system provides dry, oil-free utility air and inert gas for use on a marine vessel. A compressor converts ambient air into a pressurized air stream. The air stream is cooled by heat exchange with sea water in the vicinity of the vessel. The air stream is then dried in a dehydration membrane module, and some of the product of the dehydration module is taken for use as utility air. The remainder of the dried air is passed through an air separation module which includes a polymeric membrane. The product of the air separation module includes a nitrogen-enriched gas which is used as an inert gas on the vessel. The compressor is the only mechanically moving component of the system.

Abstract: The present invention provides a specially designed earring device configured to mechanically expand existing piercings. Fabricated of a durable stainless steel material, the X-Earring is essentially cylindrical in shape, having expansible side walls and measuring approximately one half to three quarters inch in overall length, and preferably approximately five eighths inch in length; and approximately one half to three quarters inch in overall diameter, and preferably approximately five eighths inch in overall diameter. The device further comprises an inner threaded conical member which acts as an expandable plug which increases the size of the opening. The conical member measures approximately one thirty-second inch in diameter at its small end and increases in diameter to approximately one half inch diameter at its large end.

Abstract: [Object] In manufacturing a GRIN lens by a sol-gel method, an operation for preparing a wet gel is facilitated and cracking in a base material during sintering and foaming during drawing are prevented. [Solution] The object is achieved by obtaining a GRIN lens by producing a wet gel from an alcohol solution containing a silicon alkoxide, a dopant alkoxide, and a boron alkoxide as the main ingredients, leaching the same, drying the same to form a dry gel, and sintering and drawing the same.

Abstract: A method of coloring a surface of a zirconium-based metallic glass component that includes the step of imparting interference colors by carrying out an anodizing process using an alkaline solution to form a film having a thickness of 300 nm or less on the surface of the zirconium-based metallic glass component.

Abstract: The present invention relates to a sintered product elaborated from a starting charge containing 75-99% of zircon, in mass percentage based on the oxides and having the following average weight chemical composition, in mass percentages based on the oxides 60%?ZrO2?72.8%, 27%?SiO2?36%, 0.1%?B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5, 0.1%?ZnO+PbO+CdO, B2O3+GeO2+P2O5+Sb2O3+Nb2O5+Ta2O5+V2O5+ZnO+PbO+CdO?5% 0% ?Al2O3+TiO2+MgO+Fe2O3+NiO+MnO2+CoO+CuO?5%, other oxides: ?1.5%, for a total of 100%. Notably used in a glass furnace.

Abstract: An optical fiber base material manufacturing method includes: supplying oxygen, hydrogen, and silicide to a core deposition burner; depositing silicon dioxide; adjusting a drawing up speed so that a deposition tip position remains at the same position in accordance with growth of a porous base material; calculating an average of the drawing up speed at each preset time interval; calculating a difference of the calculated average from a preset value of the drawing up speed; correcting a flow rate of silicon tetrachloride when the supplied hydrogen is hydrogen produced or stored at normal temperature, and correcting a flow rate of hydrogen when the supplied hydrogen is hydrogen obtained by vaporizing liquid hydrogen, where when correcting the flow rate of hydrogen, a flow rate of hydrogen supplied to a cladding deposition burner is also corrected in a ratio of before and after the correction of the flow rate of the hydrogen.

Abstract: It is an object of the present invention to provide a washing machine which is capable of substantially preventing vibrations of an outer tub occurring due to rotation of a rotary drum thereof from being transmitted from a base to a frame thereof. A lower edge portion (106A) of a left side face plate (106), a lower edge portion (107A) of a right side face plate (107) and a lower edge portion (108A) of a rear face plate (108) of a frame (101) surrounding an outer tub (4) are fixed to a base (102) by screws. On the other hand, a front portion (more specifically, a front left portion (111), a front right portion (112) and a second connection plate (110)) of the frame (101) and a control box (12) fixed to the front portion of the frame (101) by screws are not fixed to the base (102).

Abstract: A laundry machine configured to supply a first amount of water to the wash tub wherein a wash plate can be oscillated such that clothes items directly above and in contact with the impeller are frictionally dragged in a oscillatory manner with the wash chamber while continuing to oscillate said wash plate, an additional supply of water is added to said wash tub such that as cloth items lost frictional engagement with the wash plate, the cloth items continue to move along an inverse toroidal rollover path at higher water levels.

Abstract: A latch system includes a latch and a key barrel operably coupled via a clutch to the latch. The clutch has an engaged condition where operation of the key barrel unlatches the latch, and the clutch has a disengaged condition where operation of the key barrel does not unlatch the latch.

Abstract: A theftproof device for a motorcycle includes a housing, a slide movably mounted in the housing, a first clutch line having a first end secured on the slide and a second end protruding from the housing, a second clutch line having a first end secured on the slide and a second end protruding from the housing, and a locking member movably mounted in the housing and movable to abut the slide to stop movement of the slide, the first clutch line and the second clutch line. Thus, the locking member is moved upward to lock the slide so that the first clutch line and the second clutch line are locked and cannot be moved to prevent the clutch lever of the motorcycle from being operated so as to achieve a clutch theftproof function.

Abstract: A word-based combination locking device comprising a body, a locking mechanism and a plurality of wheels. The wheels rotate relative to the body and locking mechanism and display a plurality of letters across the device. The wheels and the letters are configured to simultaneously spell two or more words across the device.

Abstract: The invention relates to an aqueous pigment preparation containing (A) at least one organic and/or inorganic pigment, (B) a dispersant of formula (I), (II), (III) or (IV) or mixtures of the dispersants of formula (I), (II), (III) or (IV), (C) optionally wetting agents, (C) optionally other surfactants and/other dispersants, (E) optionally at least one organic solvent or at least one hydrotropic substance, (F) optionally other additives commonly used to produce aqueous pigment dispersions.

Abstract: The device for satinizing and embossing packaging foils comprises at least two embossing rollers that are each provided with a toothing consisting of individual teeth, the pyramidal teeth having an essentially rectangular horizontal projection, and the sides of the teeth being essentially parallel and perpendicular, respectively, to the longitudinal axis of the embossing roller. In contrast to the prior art, the opening angle (?) between the radially aligned adjacent tooth flanks is smaller than the opening angle (?) between the axially aligned adjacent tooth flanks, and the tooth height in the radial direction, measured from the tooth tip to the tooth bottom, is greater than the tooth height in the axial direction measured from the tooth tip to the tooth bottom. This dimensioning and arrangement of the teeth provides an improved gearing with a reduced specific pressure as well as an improved processing of the paper part of the foil that results in its better folding, curling, and tubing behavior.

Abstract: A method for forming an U-shaped metal frame includes a preparing means: bend forming a straight tube in a continuous curve shape to be a billet including a spaced section and a first and a second side segments twisted toward opposite directions individually; a forming means: placing the billet into a cavity of a forming mold, closing two ends of the billet, and feeding a high-pressure fluid into the billet; a cutting means: cutting the billet into the first and the second pipes, the first pipe including a first connecting portion formed in a first cut position thereof, the second pipe including a second connecting portion formed in a second cut position thereof; a connecting means: twisting the first side segment and the second side segment toward the same direction, and connecting the first connecting portion and the second connecting portion together to obtain the U-shaped metal frame.

Abstract: A portable handheld device for introducing an external profile into a longitudinal workpiece by noncutting shaping includes a locking element and a profiling tool having a pitchless profile disposed opposite the locking element and disposable at an adjustable angle as a function of a desired lead angle of the external profile within a force transmission plane, wherein the workpiece is disposable and removable between the profiling tool and the locking element, and wherein the profile tool and the locking element are configured to execute a feed movement relative to one another and to be adjustable to a neutral position.

Abstract: A roller hemming device capable of correcting a positional error between a robot manipulator and a workpiece, and carrying out a pre-hemming and/or hemming process with appropriate pressing force. The roller hemming device has a position detecting part adapted to detect a current position of a roller attached to a front end of the robot manipulator; a force sensor arranged between a wrist section of the robot manipulator and the roller; and a controller adapted to control the position of the roller by using an output of the position detecting part and an output of the force sensor, so that pressing force applied to a mold by the roller is a predetermined value.

Abstract: A contoured roller set and associated systems and methods are disclosed herein. A male roller having a convex surface and a pair of female rollers each having a concave surface can receive a generally thin sheet of material and impart a doubly-curved shape to the sheet. The convex and concave surfaces of the male and female rollers can have a radius of curvature chosen to match a radius of curvature of the sheet of material. The rollers are positioned and shaped to urge the sheet between the female rollers to cause the sheet to curve toward the male roller.

Abstract: A device and a process are described for bending a metallic strip (W) by means of bending tools (3, 4) which can rotate around a common axis (M) near a guide aperture (1) through which the metallic strip to be bent is fed. Controllable blocking means (5-8) are provided to lock the bending tools in positions mutually alongside the guide aperture when they are in the rest condition, and to release at least one of the bending tools in the operating condition in which the bending is performed.

Abstract: The invention concerns a method and a coiler mandrel for coiling metal strip (110), wherein the coiler mandrel (100) comprises a mandrel body (120), a plurality of radially expandable segments (115) arranged around the mandrel body (120), and a plurality of hydraulic cylinders (116) by which the segments (115) can be moved in the radial direction. To be able to coil the metal strip with a circular coil eye even when the friction varies in the individual cylinders, the invention proposes that each cylinder (116) of the plurality of cylinders be individually controlled.

Abstract: A thread rolling die includes a thread rolling region comprising a working surface including a thread form. The thread rolling region of the thread rolling die comprises a sintered cemented carbide material having a hardness in the range of 78 HRA to 89 HRA. In certain embodiments, the thread rolling die may further include at least one non-cemented carbide piece metallurgically bonded to the thread rolling region in an area of the thread rolling region that does not prevent a workpiece from contacting the working surface, and wherein the non-cemented carbide piece comprises at least one of a metallic region and a metal matrix composite region. Methods of forming a thread rolling die as embodied herein are also disclosed.

Abstract: A rationality diagnosis method and a rationality diagnosis apparatus for a sensor inside a tank are provided. The rationality diagnosis method and the rationality diagnosis apparatus can accurately and easily perform a diagnosis to determine whether rationality of all sensors is maintained. The rationality diagnosis method for the sensor inside the tank performs a rationality diagnosis of a concentration sensor, a liquid level sensor and a temperature sensor that are provided inside the tank that stores liquid. The rationality diagnosis method is characterized by diagnosing whether the rationality is lost in one of the concentration sensor, the liquid level sensor and the temperature sensor by determining whether there exists any contradiction between respective sensor values of the concentration sensor, the liquid level sensor and the temperature sensor.

Abstract: A breath test simulator for supplying a breath test analyzer with a vapor including ethyl alcohol includes a heated thermal mass to heat an inlet passage.

Abstract: An electronic apparatus includes: a recording unit configured to access a recording medium using a head; an acceleration sensor that detects acceleration generated in the electronic apparatus; and a control unit configured to write, in the recording medium or a predetermined memory, detection data indicating a result of the detection by the acceleration sensor or a state of the electronic apparatus detected on the basis of the detection result and retracting, when the detection result satisfies a drop condition for the electronic apparatus defined in advance, the head of the recording unit to a predetermined retraction position.

Abstract: A diagnostic method and system is described for diagnosing an operating condition of a conductive particulate matter sensor. The sensor has a substrate and two electrodes on the substrate adapted to collect particulate matter between the electrodes, thereby establishing an electrically conductive path through collected particulate matter between the electrodes that can be detected by measuring electrical resistance between the electrodes, Relect. The diagnosis is performed by detecting whether water vapor condensate may be present between the electrodes and if it is, then measuring resistance between the electrodes while subjecting the sensor to conditions sufficient to evaporate any water vapor condensate and diagnosing a validation that the sensor is in proper operating condition if resistance increases in a manner consistent with evaporation of condensate.

Abstract: A thermal conductivity detector includes a structure defining a cavity, the structure principally comprising a material having a first coefficient of thermal expansion; a sensing element for sensing a thermal conductivity of a gas flowing within the cavity, the sensing element having a second coefficient of thermal expansion different from the third first coefficient of thermal expansion, the sensing element being disposed at least in part within the cavity; and a compensation structure having a third coefficient of thermal expansion different from the first and second thermal coefficients of expansion. Over a selected temperature range, a stress within the sensing element is less than a yield stress of any component of the sensing element, and a stress within the compensation structure is less than a yield stress of any component of the compensation structure.

Abstract: A particle sensor including a diaphragm, a diaphragm heater, and at least two measuring electrodes situated on the diaphragm, for electrical conductivity measurement, the diaphragm having a thickness of less than or equal to 50 ?m, in order to allow a calorimetric particle quantity determination.

Abstract: A sensor head for measurement of a film, includes a guide surface (14) for the film, at least one sensor element (28, 30) integrated in the guide surface for measuring a property of the film, and a generator for generating an air cushion between the guide surface (14) and the film, the generator including a system for supplying a pressure medium, and a guide member (12) that is made of a porous material and forms at least a part of the guide surface (14) and is adapted to distributedly discharge the pressure medium into the air cushion, the guide member (12) having a channel system (16, 18) that divides the guide surface (14) into a plurality of fields (20, 22) that, if not disconnected, are connected only by narrow lands, the channel system being configured for draining the pressure medium from the air cushion.

Abstract: An air filter leak inspection method is provided. First, an aerosol to be filtered containing particles is passed through an air filter having a first edge and a second edge. Next, a leakage inspection unit is provided. The leakage inspection unit includes n probes, wherein n indicates a positive integer. Afterward, a moving procedure is set to make the probes traverse between the first edge and the second edge, thereby scanning the whole portions of the air filter. When the probes move to the second edge, the probes move along the extending direction of the second edge with a designed distance, wherein the designed distance is less than the length of each probe. Besides, the number of times that the probes traversing between the first and the second edge is determined according to the amount of the probe, the length of each probe and the height of the air filter.

Abstract: Concentrations of endogenous steroids in ovarian follicular fluid are used to develop steroid profiles which provide means for the diagnosis and prognosis of endocrine-related conditions and for identifying and developing appropriate treatments for related conditions, including the identification and development of suitable protocols for in vitro fertilization (IVF), treatment and predictive strategies for successful IVF outcomes and selected uses of oocytes for IVF or embryonic stem cell procedures.

Abstract: The present invention relates to a method for monitoring a subject suffering from heart failure, the method involving repeatedly determining, within given time intervals, the amounts of each of the following peptide markers: NT-proANP or a variant thereof; NT-proBNP or a variant thereof; a cardiac troponin or a variant thereof; and GDF-15 or a variant thereof; in a sample from the subject; and comparing the amounts measured in each determination with reference amounts of each marker; and assessing, based on differences in determined amounts in one or more of the markers, whether the subject is stable or has undergone a change in pathophysiological state.

Abstract: Described are techniques for use in connection with analyzing a droplet. One or more droplets of a sample are formed on a surface of a digital microfluidic device. The droplets are manipulated to perform processing using said one or more droplets generating one or more resulting droplets. The one or more resulting droplets may be transferred from the microfluidic device to another device for analysis. The one or more droplets may also be provided to the digital microfluidic device from yet another device or analysis instrument.

Abstract: A fitting for coupling a tubing to another component of a fluidic device, the fitting comprising a male piece having a front ferrule and a back ferrule both being slidable on the tubing, the male piece further having a first joint element configured slidably on the tubing, and a female piece having a recess configured for accommodating the front ferrule and the tubing and having a second joint element configured to be joinable to the first joint element, wherein the back ferrule is configured in such a manner that, upon joining the first joint element to the second joint element, the back ferrule exerts a pressing force on the front ferrule to provide a sealing between the front ferrule and the female piece, and the back ferrule exerts a grip force between the male piece and the tubing.

Abstract: This invention provides a device for detecting an analyte in a liquid sample, comprising a cup body (7), a lid (1) and a base (15), wherein, said the cup body (7) comprises a liquid storage chamber (9) and a test strip groove locating in one side of liquid storage chamber, the storage chamber (9) and the test strip groove communicates each other through a small hole in the bottom of liquid storage chamber, the test strip groove is configured with a test strip plate, said lid being able to seal the opening of the cup tightly, said opening of cup being directly connected with the liquid storage chamber.

Abstract: An indicator device is adapted to be disposed in the soil and is associated with an energy source for anaerobic microorganisms that is released into the soil in a manner to initiate anaerobic microbial activity in the soil in a manner that causes a change in color of the device over time. The color change on the device can be used to indicate the depth of the water table at the tested location.

Abstract: The present invention is designed to measure air mass flow for fuel injection applications, by utilizing a digital signal processor as part of the air measuring device's circuitry so that calibration tables associated with various engine types may be loaded into the processor. The digital signal processor stores a plurality of calibration tables for various engine types onboard. These may be chosen through the use of an external programming device or an onboard selection device such as a switch. The digital signal processor will convert output into either voltage or frequency outputs depending on the requirements of the particular engine control unit.

Abstract: A method of testing the functionality of an oxidation catalytic converter of an internal combustion engine, particularly a diesel engine, of a motor vehicle, includes the following steps: (a) verifying whether the motor vehicle is at a standstill; (b) verifying whether the internal combustion engine is idling; (c) verifying whether a temperature lies within a predetermined range upstream and downstream of the oxidation catalyst. Then, if all of the steps (a) to (c) yield an affirmative result, an intervention in the engine management is made in such a way that a predetermined temperature is set in the oxidation catalyst; (e) hydrocarbons (HCs) are actively produced by post-injecting fuel at a late point in time; (f) a lambda value is measured upstream and downstream of the oxidation catalyst as soon as the predetermined temperature from step (d) has been reached, and while HCs are actively produced in step (e).

Abstract: The detection appatatus includes means for detecting rotation speed information of the respective wheels of a vehicle; means for estimating, a frequency characteristic of the wheel rotation speed information; and means for determining, based on the estimated frequency characteristic, a tire having a decreased air pressure. The frequency characteristic estimate means includes, to a time-series signal including the wheel rotation speed information: means for time-series estimating a third order or more linear model parameter; means for generating pseudo input data; means for estimating, based on the estimated linear model parameter and the pseudo input data, output data to a linear model; means for identifying, based on the pseudo input data and the estimated output, a linear model parameter for which the order is reduced to a second order; and means for estimating, based on the identified parameter for which the order is reduced to the second order, a resonance frequency of a tire torsional direction.

Abstract: The invention relates to a flow state sensor (10) for detecting a flow state at a body (16) that may be impinged on by a flow (12). A flow state sensor (10) that is of a simple construction and that is simple to evaluate is characterised in accordance with the invention by at least one frequency detecting device (20) for detecting at least one predefined frequency characteristic of the flow state. The frequency detecting device (20) has at least one oscillation element (22; 22a, 22b, 22c) excitable to resonant oscillatory movement (30) by a flow (12) and having a resonant frequency or natural frequency adapted to the predefined frequency characteristic, especially corresponding to the predefined frequency characteristic. Uses of the flow state sensor (10) in a flow measuring device (62) and in a flow measuring method, and an advantageous production method for the flow state sensor (10) are also proposed.

Abstract: An apparatus comprising a downhole tool configured for conveyance within a borehole penetrating a subterranean formation, wherein the downhole tool comprises: a probe assembly configured to seal a region of a wall of the borehole; a perforator configured to penetrate a portion of the sealed region of the borehole wall by projecting through the probe assembly; a fluid chamber comprising a fluid; and a pump configured to inject the fluid from the fluid chamber into the formation through the perforator.

Abstract: In order to provide a robust, weather resistant, portable, low-noise, relatively inexpensive, wind direction detection device, disclosed herein is a method and device for detecting fluid flow direction based on sensing a temperature variation transmitted from a temperature variation source to one or more temperature sensors. One or more indicators are utilized to communicate the measured fluid flow direction to a user. An implementation of the fluid flow direction detection device utilizes a resistance heater as the temperature variation source, thermistors as the temperature sensors, and light emitting diodes (LEDs) corresponding to each thermistor as the indicators. The thermistors and LEDs are arranged in a circular fashion around the resistance heater to accurately detect the direction of a thermal plume generated by the resistance heater.

Abstract: A thermal type fluid flow sensor includes an air flow detecting portion and a temperature detecting portion formed above the same substrate, capable of correcting a humidity, and having a high measuring accuracy at a low cost, and a heat generating resistor, a temperature measuring resistor for the heat detecting resistor, a temperature measuring resistor for detecting an air flow, and a heat generating resistor for detecting a humidity are arranged in a diaphragm formed above a semiconductor substrate, an air cavity layer, and a protecting film above the air cavity layer are formed above the heat generating resistor for detecting the humidity, and the protecting film is provided with plural holes reaching the air cavity layer.

Abstract: Capacitive detector and measuring device integrating it; the detector including: a ribbon made of a dielectric material, first and second electrodes in the form of combs formed on a first surface of said ribbon and a third electrode formed on the other surface of said ribbon opposite said first and second electrodes; the thickness (e) of the dielectric ribbon is less than or equal to said determined period (?) divided by four times PI, i.e.: ?/4??e; and the ratio resulting from the division, as numerator, of the capacitance (C) between two adjacent branches of said first and second electrodes in the presence of at least one fluid with a dielectric permittivity (?f) and, as denominator, by the dielectric permittivity (?f) of the fluid multiplied by the capacitance (Co) between the two adjacent branches of the first and second electrodes in the presence of the vacuum is greater than or equal to one, i.e.: C/(?f*Co)?1. Method for manufacturing a detector fulfilling the above conditions.

Abstract: To assemble a sensor array having plural sections, the sections of the sensor array are sealably attached, where the sections include sensors and cable segments. An inert gas is flowed through at least one inner fluid path inside the sensor array when the sections of the sensor array are being sealably attached.

Abstract: A crash sensor assembly including a printed circuit board and a crash sensor mounted on the printed circuit board, At least one connector pin is mounted to the printed circuit board so as to permit external electrical communication with the crash sensor. A first insert molded soft inner layer of material partially covers the printed circuit board and covers the crash sensor, and a second overmolded hard outer layer of material covers the first soft inner layer of material and bonded thereto and rigidly contacts the printed circuit board.

Abstract: An angular velocity signal detection circuit includes: a first current-voltage conversion circuit that converts, into a voltage, a current outputted from a first detection electrode of a gyroscope, and amplifies the voltage, thereby outputs a first conversion signal; a second current-voltage conversion circuit that converts, into a voltage, a current outputted from a second detection electrode of the gyroscope, and amplifies the voltage, thereby outputs a second conversion signal; an arithmetic operation unit that performs arithmetic operations by using the first conversion signal and the second conversion signal, and outputs a first processing signal and a second processing signal; and a third difference arithmetic operation circuit that amplifies a difference between the first processing signal and the second processing signal.

Abstract: An inspection device (300) has an ultrasonic transducer (304) encased in a couplant block (302) mounted in a housing (328). The housing (328) has a pair of encoders (340, 342) mounted thereto. The transducer (304) is mounted to scan perpendicular to the contact surface (306) of the block (302). A coupling block with a PTFE layer on the contact surface is also provided.

Abstract: A MEMS pressure sensor for sensing the pressure in a sealed cavity of a MEMS device, comprises a resonant MEMS device having a pressure sensor resonator element which comprises an array of openings. The resonant frequency of the resonant MEMS device is a function of the pressure in the cavity, with resonant frequency increasing with pressure. Over the pressure range 0 to 0.1 kPa, the average change in frequency is at least 10?6/Pa. The invention is based on the recognition that for fast oscillation, the elastic force causes the resonance frequency to shift. Therefore, it is possible to sense the pressure by a device with resonance frequency that is sensitive to the pressure.

Abstract: The present disclosure relates to pressure sensors. In one illustrative embodiment, the pressure sensor may include a pressure sensor assembly having pressure ports on opposite sides of the pressure sensor assembly. The pressure sensor may include a protective housing including a first housing member and a second housing member defining a cavity for securely housing the pressure sensor assembly. The protective housing may include a first port coupled to one of the pressure ports of the pressure sensor assembly and a second port coupled to the other pressure port of the pressure sensor assembly. In some cases, the protective housing may include one or more aligning features, one or more positioning features, and a boss, which can include two or more bumps, on each side of the cavity around the pressure ports.

Abstract: A filter assembly for use with a static-dynamic piezoresistive pressure transducer that measures low amplitude, dynamic pressure perturbations superimposed on top of a high static pressure through the implementation of a low-pass mechanical filter assembly is disclosed. The filter assembly may comprise a dual lumen reference tube and a removable filter subassembly further comprising a porous metal filter and narrow diameter tube. The transducer, which may be capable of operating at ultra-high temperatures and in harsh environments, may comprise of a static piezoresistive pressure sensor, which measures the large pressures on the order of 200 psi and greater, and an ultrasensitive, dynamic piezoresistive pressure sensor which may capture small, high frequency pressure oscillations on the order of a few psi or less.