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JP2001091397A |
To provide a method for easily measuring the airtightness of a building without requiring exclusive airtightness measurement facilities, or the like. In the method for measuring the airtightness of a unit-type building 1 according to pre...
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JP2001091392A |
To provide a differential pressure transmitter that has a small number of parts and can be easily maintained. In the differential pressure transmitter equipping with first and second pressure reception chambers 201 and 202 for transmitti...
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JP2001083063A |
To provide a specific gravity measuring device, capable of accurately measuring the specific gravity of an etchant in real time by measuring the hydraulic pressure of the etchant, which is circulated in a circulation channel. A part of a...
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JP3148883B2 |
To prevent a tensile stress or a bending stress from being generated in the welding part of a capillary tube and at the same time to prevent salinity from entering. The end of a capillary tube 2 is connected to the end surface of the one...
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JP3148884B2 |
To obtain a site-type measuring instrument which can satisfy an explosionproof regulation by a method wherein a terminal base which is provided integrally with a meter housing part having an opening part in a tip face protruding to the f...
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JP3150500B2 |
PURPOSE: To easily detect secular changes without stopping the operation of a plant, etc. CONSTITUTION: A reference resistor section 80 which does not cause much temperature change is provided near a pressure receiving section 70 and the...
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JP2001074578A |
To provide a temperature characteristic regulating method for a differential pressure measuring device of a remote seal type with excellent productivity. A static pressure characteristic of a zero-point output in the differential pressur...
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JP3147280B2 |
PURPOSE: To simplify instrumentation, to enhance the reliability and to prevent a misoperation in the zero-adjustment by a method wherein a measurement differential pressure is detected by a differential pressure-measuring device body in...
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JP3147778B2 |
To improve static pressure span characteristics by reducing an area of a conductive film coated to a surface opposite to a diaphragm in a fixed electrode facing close to the diaphragm. A fixed electrode comprises an insulating plate 1 ha...
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JP3147972B2 |
PURPOSE: To prevent wear of a metal surface resulting from sliding by furnishing a coating layer in that part of a spring element which contacts a center diaphragm or a housing, wherein the spring element is provided for suppressing the ...
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JP3147275B2 |
PURPOSE: To obtain a diagnostic apparatus by which a fault part is discriminated without removing a differential-pressure detector by providing a function or the like which discriminates the kind of a fault on the basis of the response c...
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JP3142752B2 |
To provide a fixing structure of a shaft part by which a shaft part can be firmly fixed by preventing a crack and a rupture of the shaft part by stress concentration. A fixing structure of a shaft part is composed of a body 1 in which a ...
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JP2001059791A |
To provide a structure for mounting a pressure sensor for detecting hydraulic pressure which does not require drilling work for mounting a pressure sensor. In this structure for mounting a pressure sensor for detecting hydraulic pressure...
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JP3141371B2 |
PURPOSE: To provide a highly reliable differential manometer in which dust is removed and abnormal function is prevented at the sensor part while reducing the manufacturing cost. CONSTITUTION: The differential manometer comprising a meta...
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JP2001502056A |
The invention concerns a cell (28) for converting differential pressure into an electric signal comprising: two chambers (38, 40) filled with an incompressible fluid each delimited by a membrane (32, 34) capable of being deformed by the ...
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JP3134828B2 |
To provide the structure of a differential pressure sensor that is suited for obtaining an accurate pressure signal and can be manufactured easily and a method for assembling the sensor. A semiconductor chip 1 with a pressure-sensitive p...
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JP3133759B2 |
A pressure transmitter has a pressure transducer in a transmitter housing. The transmitter housing includes a groove or a notch defining a flexure closely proximate a housing outer rim. The outer rim receives a large clamping force from ...
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JP2001033333A |
To measure the pressure of fluid at an arbitrary piping place to be measured while lowering cost and simplifying constitution. This pressure measuring instrument has a static pressure detection part 7 and a flow rate measuring part 8 uni...
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JP3129613B2 |
PURPOSE: To diagnose the abnormality of a sensor so as to improve the reliability of a device by providing the sensor possessing sensibility mainly to a static pressure on a semiconductor chip, and comparing its measured signal with a st...
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JP3131374B2 |
To provide a differential pressure type semiconductor sensor of thin type. On the side surface of a body 2 to which a sensor chip 1 containing a pressure reception diaphragm 10a is jointed, first and second insertion openings 15 and 16 w...
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JP2001027572A |
To obtain a differential pressure type pressure transducer which is small-sized, lightweight, and low-cost.Bellows 5 which are made of rubber or plastic are used as a balanced previous pressure generation part 21 which generates balanced...
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JP3129100B2 |
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JP3129121B2 |
PURPOSE: To detect the clogging of a pressure introduction pipe by an apparatus easy to maintain and improve the pressure-measuring reliability, by detecting a clogging state of one or both of the pressure introduction pipes from the cor...
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JP3127430B2 |
To prevent a transmission part from rotating to the main body at the time of receiving external forces. A tubular part 18 is protrudingly provided for the enclosure 5 of a main body 2, and this tubular part 18 is fitted into a cylindrica...
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JP3127431B2 |
To enable measurement with high accuracy even by a diaphragm with small pore size. Each of reference static pressure, reference differential pressure, and reference temperature is impressed on the main body of detection by a few points i...
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JP2001009216A |
To provide the subject device simple in a structure, inexpensive, capable of precisely detecting the clogging from the outside and applicable even to an end pipe.In this device, the bypass line of a filter device 1 such as a strainer 2 i...
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JP3124773B2 |
A metal thin film bonds a semiconductor bonding region of a diaphragm layer to a ceramic bonding region of a high modulus support block. The arrangement isolates a pressure sensing diaphragm from undesired strain, improving sensor accura...
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JP3123314B2 |
PURPOSE: To prevent a center diaphragm from zero-point variation during jointing and when an excessive pressure is applied by making a pressure receiving member with a single member, arranging two sets of pressure receiving chambers, tha...
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JP3120640B2 |
PURPOSE: To prevent clearance corrosion from occurring by providing a space part or a qroove at the outer-periphery side of the diaphragm mounting part of a pressure reception chamber. CONSTITUTION: A pressure reception cover 8, two sepa...
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JP2000346734A |
To provide a device for reliably measuring differential pressure by preventing power object or the like from being deposited in a monitor pipe for clogging.An air-feeding pipe 2 is mounted to one portion of a monitor pipe 1 where a tip p...
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JP2000337986A |
To provide a capacitive pressure detecting element which can secure good responsiveness in a high flow rate domain while maintaining sensitivity required for detecting a very small differential pressure in a low flow rate domain and, in ...
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JP3111816B2 |
PURPOSE: To facilitate maintenance while reducing the size and saving manhour by providing a signal processing section with a deflectable inlet for introducing time wiring of host controls. CONSTITUTION: Under a state where a transmitter...
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JP2000314650A |
To provide a capacitance-type gas/liquid detector by which a change in a capacitance caused by a liquid coming into contact with a sensor can be detected surely and easily. This gas/liquid detector 10 for an ionic liquid is provided with...
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JP3107516B2 |
To realize a composite sensor which can detect by single sensor the water level and water quality or the flow rate and water quality in the water storage system such as reservoir, paddy field, etc. A first glass substrate 2 having a pres...
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JP3105680B2 |
PURPOSE: To provide a miniature semiconductor differential pressure sensor having protective function for diaphragm in which a microgap can be obtained between a diaphragm and an excess pressure stopper member. CONSTITUTION: Two fluid pr...
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JP3106805B2 |
A displacement converter in which a pressure difference is determined by detecting capacitances C1 and C2 between fixed electrodes (3, 4) and a diaphragm (1), which receives pressure differences on both of its sides and can be displaced....
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JP3106249B2 |
A differential pressure sensor is attached to a process via a high and a low pressure impulse line. An absolute pressure sensor is also attached to each impulse line. To determine if an impulse line is blocked, a noise signal is acquired...
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JP3105087B2 |
PURPOSE: To obtain a differential-pressure detector, which can obtain the highly reliable detected value of differential pressure all the time without the effect of temperature change. CONSTITUTION: Liquid separating diaphragms 4 and 5 a...
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JP2000283399A |
To improve airtight performance by limiting a mechanical joint part to be only between a process connector and a transmitter by jointing stainless steel pipes to each other by welding to constitute required piping. This piping mechanism ...
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JP3095025B2 |
An amplifier stage (10) includes an operational amplifier (12) having inverting (16) and non-inverting (14) inputs and an output (20) and a resistive tee network (22) coupled in the feedback loop between the inverting input (16) and outp...
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JP3094380B2 |
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JP3089580B2 |
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JP3090175B2 |
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JP3089834B2 |
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JP3087268B2 |
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JP2000241277A |
To avoid standing of bubbles in a fluid within a sensor. A first substrate 1 is provided with a detection electrode 16 while a second substrate 2 is provided with a boss part 4 oppositely to the detection electrode 16 and a measuring rec...
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JP2000241290A |
To determine a test time corresponding to the threshold value of pressure variation of a pressure sensor easily without relying upon calculation. The volume varying unit M comprises a body 10 having a cylinder chamber 11, a piston 20 scr...
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JP2000234978A |
To provide a differential-pressure detecting device which can be miniaturized easily and which is of high reliability and to provide a fluid-pressure actuator which uses the detecting device and which is of high reliability. In this diff...
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JP3080212B2 |
To improve static pressure and temperature characteristic by providing 1st to 4th measuring chambers for forming diaphragms in a semiconductor substrate, first and second sensors for allowing the 3rd and 4th measuring chambers the to com...
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JP3070338B2 |
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