摘要:
Disclosed is a pressure sensor, with a base body (1) of ceramic, a measuring membrane (3, 41) arranged on the base body (1), a pressure measurement chamber (5) enclosed in the base body (1) under the measuring membrane (3, 41), and at least one metal body connected to the base body (1) using a pressure-tight, preferably elastomer-free, mechanical connection (7, 37, 49), wherein thermomechanical stresses caused by the connection (7, 37, 49) are reduced by the fact that the pressure-tight mechanical connection (7, 37, 49) is achieved using an adjustment body (9, 19, 39, 51) arranged between the base body (1) and the metal body, wherein the adjustment body has a thermal expansion coefficient (a(z)) that increases, in a direction (z) from the base body (1) to the metal body, from an expansion coefficient corresponding to a thermal expansion coefficient (a
k ) of the ceramic of the base body (1) to an expansion coefficient corresponding to the thermal expansion coefficient (a
M ) of the metal body, and the adjustment body (9, 19, 39, 51) is connected to the base body (1) by a first join (11) and to the metal body by a second join (13).
摘要:
A wireless circuit includes a housing having at least one opening, and sensor connected to the housing at the opening. The sensor includes a first layer having a first dimension and a second layer having a second dimension shorter than the first dimension. The second layer may be positioned entirely within the housing and a surface of said first layer may be exposed to an exterior of the housing.
摘要:
The invention relates to a pressure sensor system comprising a pressure sensor chip (1) which is mounted, together with a pressure feed (22) leading to the pressure sensor chip (1), on a mounting seat (20) of a ceramic housing body (2). The housing body (2) has a three-dimensional, monolithic design and is produced from a ceramic material with a thermal expansion coefficient which, in a temperature range of greater than or equal to -40 °C and less than or equal to 150°C, deviates by less than 30% from the thermal expansion coefficient of the pressure sensor chip (1).
摘要:
A process pressure measuring system includes a transmitter having a first sealed system in which a first outlet couples to a pressure sensor, a first isolator diaphragm assembly, a first capillary passage, and a first isolation fluid. The first isolation fluid couples a first pressure from the first isolator diaphragm to the first outlet and the pressure sensor. A second sealed system includes a second pressure outlet that is coupled to the first isolator diaphragm assembly, a second isolator diaphragm assembly, a second capillary passage and a second isolation fluid. The second isolation fluid is adapted for use in a first temperature range and couples a pressure from the second isolator diaphragm assembly to the second pressure outlet. A third sealed system includes a third pressure outlet that is coupled to the second isolator diaphragm assembly, a third isolator diaphragm assembly, a third capillary passage and a third isolation fluid. The third isolator fluid is adapted for use in a second temperature range and couples a process pressure to the third pressure outlet.
摘要:
A process fluid pressure measurement system (10) is provided. The system includes a process fluid pressure transmitter (12) having a pair of process fluid ports disposed coplanar with one another on a bottom surface thereof. The process fluid pressure transmitter (12) is configured to measure a differential pressure between the pair of process fluid ports and provide an indication of the measured differential pressure over a process communication loop. A process fluid flange (18) has a first surface (36) configured to mount to the surface of the process fluid pressure transmitter (12), a second surface (34) opposed to the first surface (36), and at least one lateral sidewall (37) extending between the first and second surface (36, 34). A plurality of fins (32) are disposed proximate the lateral surface (37).
摘要:
An amplifier-embedded pressure sensor 1 includes: a pressure-detecting element 3 which detects the differential pressure between the fluid and the space where the pipe including a fluid passage of the fluid is installed, and outputs the pressure signal; an amplifier circuit board 5 having an amplifier circuit 5a for amplifying the pressure signal; a housing 2 to which the pressure-detecting element 3 is fixed; and a separation part 4 which is fixed to the housing 2 and separates a space inside the housing 2 into a first space R1 where the pressure-detecting element 3 is disposed and a second space R2 where the amplifier circuit board 5 is disposed. The housing 2 includes an inflow port 7 for letting cooling gas for cooling the amplifier circuit board 5 flow into the second space R2 and a discharge port 8 for discharging the cooling gas from the second space.
摘要:
The invention relates to a thermal protection element (1), which is arranged on the front side for protecting a diaphragm (11) of a pressure sensor (10) to which pressure is applied. According to the invention, the thermal protection element (1) has, in the region of the sensor diaphragm (11), lamellae (2) which run parallel or are configured as circular arc segments (8) and cover 40% to 60% of the diaphragm surface, with the ratio between the cross-sectional height (h) of the lamellae (2) and the cross-sectional width (b) thereof being 8:1 to 12:1.
摘要:
Die Erfindung betrifft ein Druckmesssensor bestehend aus einem Sensorträger und einem eine Membran tragenden Membranträger. Der Sensorträger ist mit einem Verbindungskanal ausgestattet, um den vor der Membran angeordneten Membranraum mit dem Druckmessraum zu verbinden. Es ist eine Umlenkung vorgesehen, durch welche die von dem Druckmessraum durch den Verbindungskanal in den Membranraum laufende Gasdruckwelle eine Kühlung erfährt.