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公开(公告)号：EP2232220A1
公开(公告)日：2010-09-29
申请号：EP08862655.1
申请日：2008-12-05
申请人： Rosemount, Inc.
发明人： BEHM, Steven, M. , KRUEGER, William, B. , SMITH, Jay, W. , REDDICK, Jeffrey, P. , GRAUPMANN, Jeffrey , SEELIG, Aaron
CPC分类号： G01L19/0681 , F28F13/00 , F28F2013/008 , G01L19/0645
摘要： A direct mount for coupling a pressure transmitter to a process fluid of an industrial process includes a transmitter coupling configured to couple to a pressure transmitter. A process coupling is configured to couple an industrial process. A capillary tube extends between the transmitter coupling and the process coupling. A thermally conductive path having relatively high thermal conductivity extends between the process coupling and the transmitter coupling. Preferably, a thermal switch selectively thermally connects the thermally conductive path between the process coupling and the transmitter coupling.
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公开(公告)号：EP0670995B1
公开(公告)日：1998-05-27
申请号：EP93921244.5
申请日：1993-08-30
申请人： ROSEMOUNT INC.
CPC分类号： G01L19/0618 , G01L9/0042
摘要： A low range pressure sensor (10) includes a base plate of brittle material (12), and a diaphragm plate assembly (14) mounted on the base plate (12) and sealed around a periphery (16) to the base plate (12). Pressures are introduced to cause a center diaphragm section (18) to deflect toward the base plate (12), and the deflection of the diaphragm (18) is sensed through strain gauges (32) to provide an indication of the pressure. The diaphragm (18) is provided with a plurality of individual support posts (36) on a side facing the base plate (12), so that when the diaphragm (18) is deflected toward the base plate (12) under high overpressures the support posts (36) will support the diaphragm (18) against movement to avoid failure or breakage of the diaphragm (18). The number of support posts (36) can be varied as desired. In a preferred form of the invention, the base plate is provided with a very thin layer (40) of silicon dioxide, which is a good electrical insulator and which also serves to help accommodate slight movement of the support posts (36) as they touch the surface of the base plate (12) to reduce stress buildup in the diaphragm (18) as the overpressure increases.
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公开(公告)号：EP1216403B1
公开(公告)日：2007-01-03
申请号：EP00966927.6
申请日：2000-09-26
申请人： ROSEMOUNT INC.
IPC分类号： G01L9/00
CPC分类号： G01L19/143 , G01D1/00 , G01L9/0072 , G01L9/045 , G01L9/125 , G01L13/026 , G01L19/0681 , H01R29/00
摘要： A pressure transmitter (20, 21, 60, 150, 190, 200, 201) with a transmitter housing (22, 62, 152) having an outer wall (64, 154) providing thermal resistance (66). The outer wall (64, 154) extends from an isothermal island (68, 156) at a first end (70) to a heat sink island (72, 159) at a second end (74). The isothermal island (68, 156) includes a fluid inlet (38, 76, 158, 202), and pressure and temperature sensors (34, 78, 164; 42, 80, 166). The heat sink island (72, 159) includes a primary heat load device (40, 41, 110, 174) that is heat sunk to an outer shell (104, 170) of an electrical connector. The connector (102, 168) contacts (24, 26, 108, 172) carry a current controlled by the transmitter, and a portion of the current is conducted by a primary heat load device (40, 41, 110, 174). A circuit board (120, 176) controls the current to represent the pressure. A high accuracy, temperature compensated current output represents pressure.
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公开(公告)号：EP1216403A1
公开(公告)日：2002-06-26
申请号：EP00966927.6
申请日：2000-09-26
申请人： ROSEMOUNT INC.
IPC分类号： G01L9/00
CPC分类号： G01L19/143 , G01D1/00 , G01L9/0072 , G01L9/045 , G01L9/125 , G01L13/026 , G01L19/0681 , H01R29/00
摘要： A pressure transmitter (20, 21, 60, 150, 190, 200, 201) with a transmitter housing (22, 62, 152) having an outer wall (64, 154) providing thermal resistance (66). The outer wall (64, 154) extends from an isothermal island (68, 156) at a first end (70) to a heat sink island (72, 159) at a second end (74). The isothermal island (68, 156) includes a fluid inlet (38, 76, 158, 202), and pressure and temperature sensors (34, 78, 164; 42, 80, 166). The heat sink island (72, 159) includes a primary heat load device (40, 41, 110, 174) that is heat sunk to an outer shell (104, 170) of an electrical connector. The connector (102, 168) contacts (24, 26, 108, 172) carry a current controlled by the transmitter, and a portion of the current is conducted by a primary heat load device (40, 41, 110, 174). A circuit board (120, 176) controls the current to represent the pressure. A high accuracy, temperature compensated current output represents pressure.
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公开(公告)号：EP0670995A1
公开(公告)日：1995-09-13
申请号：EP93921244.0
申请日：1993-08-30
申请人： ROSEMOUNT INC.
CPC分类号： G01L19/0618 , G01L9/0042
摘要： A low range pressure sensor (10) includes a base plate of brittle material (12), and a diaphragm plate assembly (14) mounted on the base plate (12) and sealed around a periphery (16) to the base plate (12). Pressures are introduced to cause a center diaphragm section (18) to deflect toward the base plate (12), and the deflection of the diaphragm (18) is sensed through strain gauges (32) to provide an indication of the pressure. The diaphragm (18) is provided with a plurality of individual support posts (36) on a side facing the base plate (12), so that when the diaphragm (18) is deflected toward the base plate (12) under high overpressures the support posts (36) will support the diaphragm (18) against movement to avoid failure or breakage of the diaphragm (18). The number of support posts (36) can be varied as desired. In a preferred form of the invention, the base plate is provided with a very thin layer (40) of silicon dioxide, which is a good electrical insulator and which also serves to help accommodate slight movement of the support posts (36) as they touch the surface of the base plate (12) to reduce stress buildup in the diaphragm (18) as the overpressure increases.
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