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JPH0785022B2 |
A circuits for compensating temperature-dependent and temperature-independent drift of a capacitive sensor including two measuring capacitors (3, 4) comprises pulse duration demodulators (11, 12) in the relevant input circuits. In accord...
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JPH07229805A |
PURPOSE: To provide a pressure/differential pressure measuring apparatus in which the indication error or the temperature characteristics are prevented from deteriorating due to generation of bubble in an encapsulated liquid. CONSTITUTIO...
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JPH07229806A |
PURPOSE: To suppress variation of span due to tightening of a cover flange without increasing the size by providing a seal ring and the body with inclination. CONSTITUTION: The seal ring 20a and the body 1a are inclined by such a extent ...
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JPH07229807A |
PURPOSE: To provide a differential pressure measuring apparatus with an overpressure preventive mechanism in which pressure loss due to movement of a liquid separation diaphragm is prevented through a simple structure while suppressing t...
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JPH07225167A |
PURPOSE: To obtain a differential pressure detector which can judge the abnormality within a detector by providincj a pressure buffer member between a reference pressure introduction port and a reference pressure chamber for relaxing the...
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JPH07225168A |
PURPOSE: To obtain a differential type pressure sensor which can be handled easily and is not affected by external force and noise for measurincj the pressure difference between two points and the alternate frequency. CONSTITUTION: A pie...
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JPH07218367A |
PURPOSE: To provide a differential pressure measuring apparatus in which no plastic deformation occurs in a central diaphragm even if the apparatus has an excess pressure preventing function at a high pressure difference and which has sm...
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JPH07218368A |
PURPOSE: To provide a differential pressure measuring apparatus in which weldability is improved and which has no characteristic error due to friction, hysteresis, etc. CONSTITUTION: The differential pressure measuring apparatus comprise...
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JPH07209120A |
PURPOSE: To prevent product damage and keep safety by protecting a capillary tube, and constituting a liquid-contact part to be adapted the process connection. CONSTITUTION: For sealant, silicone oil or fluorine-based oil with large comp...
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JPH0774767B2 |
A capacitive ratioing oscillator circuit utilizing a prior art pressure capsule, but through modification of the state variable oscillator circuit achieves a digital output which varies with the square root of the capacitance ratio C35 C...
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JPH07198519A |
PURPOSE: To adjust the compliance with shift quantity by a barrier diaphragm, reduce the hysteresis to the minimum, and solve problems such as zero shift or span shift. CONSTITUTION: A center diaphragm 7 is provided in a manner to be sei...
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JPH0733145Y2 |
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JPH07190874A |
PURPOSE: To simplify a pressure-sensitive sensor part and a cylindrical connection-part structure for a transmission part, to simplify a lead extraction structure at a sensor and to reduce the length of a sealed circuit from every pressu...
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JPH07190873A |
PURPOSE: To provide a simple and sturdy pressure sensor capable of giving the vibration of a bridge across diaphragms as a function of a pressure difference. CONSTITUTION: This differential pressure transducer has the first and the secon...
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JPH0769132B2 |
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JPH0762641B2 |
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JPH07159307A |
PURPOSE: To eliminate a need of inspecting the clogging-up state of a filter and to prevent an accident due to the clogging-up of the filter by automatically finding the replacement time of the filter. CONSTITUTION: In an apparatus, a ga...
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JPH0732523U |
[Purpose] We are trying to obtain a measuring instrument that can be used in a fluid flow meter and is not affected by external vibration and is easy to manufacture. [Constitution] The rubber-molded inner case 14 is airtightly surrounded...
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JPH07140028A |
PURPOSE: To provide a semiconductor-capacitor type differential-pressure sensor, which can readily apply measuring pressure on a sensor. CONSTITUTION: The diaphragm of a very thin silicon substrate, which is displaced in compliance with ...
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JPH07139977A |
PURPOSE: To install a differential pressure with a simple operation. CONSTITUTION: Pressure-guiding pipes 6a and 6b where flanges 7a and 7b are provided on pressure-guiding pipe connection holes 5a and 5b are aligned at the upstream and ...
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JPH07128170A |
PURPOSE: To lower output errors which are attributed to a gap generated at a contact part between a protective diaphragm and a main body due to a welding and will be caused by changes in ambient temperature and variations in introduction...
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JPH0720725Y2 |
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JPH07120338A |
PURPOSE: To measure stably by enduring an excessively large differential pressure from the high pressure side with the withstanding pressure, restricting a displacement of a center diaphragm to the low pressure side with a casing, and sh...
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JPH07113710A |
PURPOSE: To provide an inexpensive and easily assembled pressure sensor, which can continuously detect a pressure and sharply responds to a minute pressure so as to accomplish highly precise detection. CONSTITUTION: A pressure sensor is ...
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JPH07113712A |
PURPOSE: To provide a highly precise differential pressure signal and to improve controlling precision of a plant by arranging a thin part forming a differential pressure sensor serving as a main strain sensor on a semiconductor base boa...
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JPH07113711A |
PURPOSE: To divide the inside of a housing into a high pressure side chamber and a low pressure side chamber by means of the first center diaphragm with a silicon diaphragm so as to protect a sensor main body part from a momentary overpr...
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JPH07113707A |
PURPOSE: To accomplish highly precise measurement by providing a differential pressure detecting unit on a semiconductor base board and a static pressure detecting unit consisting of a V-shaped hole thin part, and a semiconductor strain ...
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JPH0739978B2 |
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JPH07110276A |
PURPOSE: To simplify the amplification stage of a later stage, improve its reliability, and reduce its cost by providing a means for compensating the temperature influence of a diffusion resistance formed on a semiconductor compound sens...
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JPH0723257U |
[Purpose] In the fitting joint between the detection unit body and the transmitter housing, improvement of vibration resistance, simplification of the coupling structure, reduction of the number of coupling parts, improvement of coupling...
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JPH07103839A |
PURPOSE: To provide a manometer/differential manometer for measuring the pressure, level, flow rate, etc., of a combustible fluid requiring an explosion-proof structure in which the temperature rise in a converter is restrained by suppre...
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JPH07103841A |
PURPOSE: To enhance the workability and manufacturability by employing a metal flow junction as means for fitting members airtightly each other. CONSTITUTION: A pressure receiving section for measuring fluid comprises a unit component of...
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JPH0716976Y2 |
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JPH0798258A |
PURPOSE: To provide a differential-pressure measuring apparatus, which can protect the main body part of a sensor against excessive pressure, can prevent the occurrence of the defective welding of a center diaphragm and can reduce hyster...
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JPH0720539U |
[Purpose] Provided is a differential pressure sensor which is excellent in responsiveness and inexpensive, and does not overload the differential pressure detection portion of the diaphragm even if an abnormal differential pressure is ge...
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JPH0714841Y2 |
An oil filter for filtering oil is combined with a differential pressure indicator with temperature compensation. The differential pressure indicator has a spool assembly slidably disposed in a spool insertion cylinder in axially confron...
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JPH0792047A |
PURPOSE: To provide a highly sensitive micro pressure difference detecting device with a hysteresis less than in the past. CONSTITUTION: A sealed space formed by a base 1 having a Hall element sensor 5 in the center part and a cover 2 th...
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JPH0783777A |
PURPOSE: To make it possible to perform self-diagnosis of the leakage of a seal diaphragm without detaching the seal diaphragm from a measuring line by comparing the stored output value of a strain detection element with the actual outpu...
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JPH0783778A |
PURPOSE: To prevent the welding inferiority of center diaphragms by moving a seal liquid through the communication hole of the second center diaphragm having a smaller diameter fixed to a first center diaphragm. CONSTITUTION: When pressu...
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JPH0726887B2 |
A diaphragm for use as a pressure receiving and dislocatable member in a condenser-type microphone detector. The diaphragm electrode is a thin metallic film member having a central movable portion, a supporting frame portion around the o...
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JPH0716114U |
[Purpose] The cylindrical connection part of the terminal box is connected to the through hole of the transmitter case with a structure that does not cause rattling due to its simple structure and has excellent vibration resistance. [Con...
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JPH0714344U |
[Purpose] It is easy to center and install the gasket, etc. that is interposed between the pressure-measured part and the pressure-measurement end, and there is no damage to the sealing surface or diaphragm, and the sealing performance c...
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JPH0721435B2 |
An excessive pressure differential indicating device for use with a filter in a liquid circulating system. The device has a reciprocable piston that reciprocates between a high pressure location, when the pressure differential is not exc...
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JPH079063Y2 |
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JPH0712942U |
[Purpose] Reduce and prevent the effects of deformation and temperature changes other than the diaphragm, enabling highly accurate measurement. [Constitution] An annular diaphragm portion 2 is provided on the substrate 1, and an annular ...
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JPH0755619A |
PURPOSE: To eliminate the influence by a metal wiring and improve detecting precision by designing the form and direction of the metal wiring. CONSTITUTION: Four diffusion leads 20 are formed substantially at equal intervals in the circu...
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JPH0712943U |
[Purpose] By integrating the differential pressure transmitter and the pressure transmitter, the production line can be unified, and it can be used as a differential pressure transmitter or as a pressure transmitter according to the spec...
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JPH0712944U |
[Purpose] The purpose is to calculate and display multiple pressures on one pressure measurement display device. [Constitution] At least two or more input ports 3a and 3b are provided, pressure sensors 14a and 14b for detecting pressure ...
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JPH0749280A |
PURPOSE: To provide a differential pressure measuring device simple and low- priced with high excessive pressure detecting reliability by computing the difference of both signals of distortion detecting elements disposed respectively at ...
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JPH0749281A |
PURPOSE: To enable manufacture at a low cost with high accuracy in the thickness dimension of a diaphragm by letting an epitaxial growth layer grow on the surface of an SOI wafer, and performing selective polishing with a silicon oxide f...
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