摘要:
A pressure sensor has a measuring cell, a measuring cell mount and an electronic sensor system connected to the measuring cell. The pressure sensor is designed as a modular unit in which the electronic sensor system and its electric connections are protected against moisture and mechanical loads, in which the electronic sensor system is embedded in a protective cushion, and in which the protective cushion is surrounded by an encapsulation.
摘要:
A pressure measuring device with a housing (21, 53) and a pressure measuring cell is provided, the pressure measuring cell being protected from interference, in particular independently of its installation position in the housing (21, 53), and comprising: a housing (21, 53), a pressure measuring cell, which has at least one pressure-sensitive measuring diaphragm (3, 35, 37), on the outer side of which a pressure (P, P1, P2) acts during operation, which has a transducer for converting a pressure-dependent deflection of the measuring diaphragm (3, 35, 37) into an electrical measured variable and which has free outer circumferential surfaces, which are provided with an electrically conductive coating (31, 61), and an electronic circuit (13, 49) for converting the electrical measured variable into a measuring signal.
摘要:
An apparatus for determining and/or monitoring a physical and/or chemical, measured variable of a medium, including a housing, especially an elongated housing, and a sensor arranged in the housing. The sensor serves for registering the measured variable, wherein the housing has at least one opening, through which the sensor comes in contact with the medium. The housing has a first housing section, in which the sensor and a sensor electronics are arranged. The sensor electronics is arranged on a first carrier element. The sensor electronics serves for changing the measured variable into an analog electrical signal. An insert is applied in the first housing section, in which the sensor electronics is arranged. The insert is tubular.
摘要:
A pressure sensor that is particularly suitable inter alia for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal (3, 45) with a separating diaphragm (7, 53) on which a pressure (P) to be measured acts and having a ceramic measuring cell (9, 57) which is connected to the diaphragm seal (3, 45) exclusively by inorganic materials, is provided, in which sensor the separating diaphragm (7, 53) and all further sensor components coming into contact during measurement with a medium of which the pressure (P) is to be measured are metallic.
摘要:
A pressure sensor for measuring a pressure difference between a pressure being measured and the ambient atmospheric pressure surrounding the pressure sensor, including a platform and a membrane loadable with a pressure being measured. The membrane is secured at its edge to the platform, with a pressure chamber thus being formed between the platform and the measuring membrane. The pressure chamber communicates over a reference air path with the atmosphere, with the reference air path being a winding path.
摘要:
An apparatus for determining and/or monitoring a physical and/or chemical, measured variable of a medium, including a housing, especially an elongated housing, and a sensor arranged in the housing. The sensor serves for registering the measured variable, wherein the housing has at least one opening, through which the sensor comes in contact with the medium. The housing has a first housing section, in which the sensor and a sensor electronics are arranged. The sensor electronics is arranged on a first carrier element. The sensor electronics serves for changing the measured variable into an analog electrical signal. An insert is applied in the first housing section, in which the sensor electronics is arranged. The insert is tubular.
摘要:
A pressure sensor that is particularly suitable for the food industry and the measuring accuracy of which is stable over a long time, having a diaphragm seal with a separating diaphragm on which a pressure to be measured acts and having a ceramic measuring cell which is connected to the diaphragm seal exclusively by inorganic materials, is provided, in which sensor the separating diaphragm and all further sensor components coming into contact during measurement with a medium of which the pressure is to be measured are metallic.
摘要:
The invention is concerned with a pressure sensor which avoids temperature hysteresis effects caused on account of heat-induced expansions as a result of stresses between a ceramic pressure-measuring cell and a metallic housing. The inventive pressure sensor (100) for determining the pressure of a process medium comprises a metallic housing (110), which is open to a process medium and has a continuous hole (111) for accommodating the ceramic pressure-measuring cell (120), the pressure-measuring cell (120) comprising a ceramic base body (122) and a ceramic diaphragm (121), which is fitted thereon and is exposed to the process medium, and also suitable means (124a, 124b, 130), which supply an electrical signal which can be picked off and corresponds to the process pressure acting on the diaphragm (121). The pressure-measuring cell (120) is fixed axially in a resilient manner in the housing (110) by means of a metallic fixing device (150) which acts on a non-metallic intermediate body (140), which is provided between the pressure-measuring cell (120) and the fixing device (150) and can be moved radially at least with respect to the fixing device (150).
摘要:
A method for operating a pressure sensor, which includes a measuring membrane, at least one platform and a capacitive transducer having two pressure dependent capacitances between electrodes on the measuring membrane. The measuring membrane divides a volume pressure-tightly into two volume portions, wherein the second volume portion is enclosed in a measuring chamber between the measuring membrane and the platform. A deflection of the measuring membrane depends on a pressure measurement variable p, which is a difference between a first pressure p1 and second pressure p2 in the volume portions. The pressure measurement variable p follows from both capacitances, wherein, for an intact pressure sensor, the second capacitance is a predetermined function of the first capacitance and, in given cases, the temperature. The method has steps as follows: registering value pairs of both capacitances; testing whether the value pairs correspond within a tolerance range to the predetermined function; and determining a change, respectively damage, of the sensor, when this is too long not the case.
摘要:
A pressure sensor including: A pressure measuring cell having an end face loadable with the medium; a housing having a media opening and a ring-shaped, axial bearing surface, which surrounds the media opening; a clamping apparatus; and a ring-shaped sealing arrangement. The pressure measuring cell is positioned in the housing and the sealing arrangement is positioned between the bearing surface and the end face, and the sealing arrangement, as well as the pressure measuring cell, are axially clamped between the bearing surface and the clamping apparatus. The sealing arrangement includes, a decoupling ring, as well as a first and a second, ring-shaped sealing element. The first sealing element lies against the end face, the second sealing element lies against the bearing surface, and the decoupling ring is axially clamped between the first and the second sealing elements.